CN104333112B - A kind of RTC electric power controller and method - Google Patents
A kind of RTC electric power controller and method Download PDFInfo
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- CN104333112B CN104333112B CN201410603758.4A CN201410603758A CN104333112B CN 104333112 B CN104333112 B CN 104333112B CN 201410603758 A CN201410603758 A CN 201410603758A CN 104333112 B CN104333112 B CN 104333112B
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Abstract
The present invention provides a kind of RTC electric power controller, and it is suitable in the RTC system of equipment, and described electric power controller includes device power supply (DPS) power supply circuits, a battery feed circuit, a RC charge-discharge circuit and a MCU；Described device power supply (DPS) power supply circuits connect battery feed circuit and RC charge-discharge circuit respectively, described RC charge-discharge circuit is additionally coupled to device power supply (DPS) power supply circuits and forms to be connected the junction point A of RTC chip U1 feeder ear on the connecting line of battery feed circuit and on described connecting line, and described device power supply (DPS) power supply circuits, battery feed circuit and RTC chip are all controlled by described MCU.The present invention also provides for a kind of RTC method for managing power supply.The medicine have the advantages that by the management to RTC system backup power supply, adopt multichannel back-up source power supply plan, solve RTC system time reset issues, and can automatically investigate RTC low-voltage alarm problem by mistake.
Description
[technical field]
The present invention relates to a kind of RTC method for managing power supply and device.
[background technology]
At present, the RTC system in media player, generally adopt disposable button cell or farad capacitor power supply in support.Shortcoming 1: when adopting disposable button cell, (such as shutdown one week) after equipment shutdown, if button cell electricity is not enough, will cause RTC system time to be reset；Shortcoming 2: when adopting farad capacitor, reaches the standard grade (such as at least one moon) during this period of time at the media player media player that dispatches from the factory, farad capacitor self discharge, can cause back-up source electricity deficiency too, cause RTC system time to be reset；Shortcoming 3: when the RTC clock chip in RTC system is because, when battery, farad capacitor electricity are low or circuit is subject to the low electricity warning of other interference triggered, RTC system cannot investigate fault automatically.
[summary of the invention]
One of the technical problem to be solved in the present invention, it is in that to provide a kind of RTC electric power controller, it adopts multichannel back-up source, solve the problem that the RTC system time of existing equipment is easily reset, when battery electric quantity deficiency, the short time shutdown of equipment can be tackled, ensure the normal operation of RTC, thus the present invention can significantly reduce the workload of after-sales service.
The present invention one solves one of above-mentioned technical problem by the following technical programs:
A kind of RTC electric power controller, it is suitable in the RTC system of equipment, and described electric power controller includes device power supply (DPS) power supply circuits, a battery feed circuit, a RC charge-discharge circuit and a MCU；Described device power supply (DPS) power supply circuits connect battery feed circuit and RC charge-discharge circuit respectively, described RC charge-discharge circuit is additionally coupled to device power supply (DPS) power supply circuits and forms to be connected the junction point A of RTC chip feeder ear on the connecting line of battery feed circuit and on described connecting line, described device power supply (DPS) power supply circuits, battery feed circuit and RTC chip are all controlled by described MCU, and described RTC chip is the master chip of RTC system.
Further, described device power supply (DPS) power supply circuits are made up of resistance R1, audion Q1, communication relay LS1 and diode D1；One end of described resistance R1 connects the P1 pin of described MCU, the B pole of other end connecting triode Q1, the C pole of described audion Q1 is connected to the 2nd pin of described communication relay LS1,1st pin and the 3rd pin of described communication relay LS1 are also connected with the system power supply of equipment, 4th pin of described diode D1 and described communication relay LS1 is connected, and described diode D1 is additionally coupled to described junction point A.
Further, described audion Q1 is NPN type triode.
Further, described diode D1 is Schottky diode.
Further, described RC charge-discharge circuit is made up of resistance R2, electric capacity CB1, diode D2, communication relay LS2, audion Q2 and resistance R4；One end of described resistance R4 connects the P2 pin of described MCU, the B pole of other end connecting triode Q2, the C pole of described audion Q2 connects the 2nd pin of described communication relay LS2,3rd pin of described communication relay LS2 connects junction point A, 1st pin of described communication relay LS2 connects the system power supply of equipment, 5th pin of described communication relay LS2 connects one end of diode D2, the other end of described diode D2 is also respectively connected with one end of resistance R2 and the positive pole of electric capacity CB1, and the other end of described resistance R2 connects described device power supply (DPS) power supply circuits.
Further, described battery feed circuit is made up of diode D3, resistance R3 and battery BAT, and described diode D3, resistance R3 and battery BAT are sequentially connected with, and described diode D3 is also connected with described junction point A.
Further, described MCU also includes SCL pin and SDA pin, and the RTC chip of described RTC system includes SCL pin and SDA pin；The SCL pin of described MCU connects the SCL pin of described RTC chip, and the SDA pin of described MCU connects the SDA pin of described RTC chip, forms described I by this two connection2C-channel.
The two of the technical problem to be solved in the present invention, are in that to provide a kind of RTC method for managing power supply, and it adopts multichannel back-up source, solves the problem that the RTC system time of existing equipment is easily reset, meanwhile, passes through I2C-channel investigation RTC low-voltage is missed alarm problem and is accurately judged to battery electric quantity deficiency, when battery electric quantity deficiency, can tackle the short time shutdown of equipment, ensure the normal operation of RTC.
The present invention two solves the two of above-mentioned technical problem by the following technical programs:
A kind of RTC method for managing power supply, this management method is based on a kind of RTC electric power controller and realizes, described electric power controller its suitable in the RTC system of equipment, described RTC electric power controller includes device power supply (DPS) power supply circuits, a battery feed circuit, a RC charge-discharge circuit and a MCU；Described method for managing power supply includes shutdown power management step and start power management step；
Described shutdown power management step is: during equipment shutdown, if the voltage of described RC charge-discharge circuit output is higher than the voltage of described battery feed circuit output, then RC charge-discharge circuit is to the power supply of RTC system, if the voltage of described RC charge-discharge circuit output is equal to the voltage of described battery feed circuit output, then RC charge-discharge circuit and battery feed circuit give the power supply of RTC system simultaneously, if the voltage that the voltage of described RC charge-discharge circuit output exports less than described battery feed circuit, described battery feed circuit give described RTC system power supply；
Described start power management step is: after described device power, MCU controls the power supply of equipment offer by described device power supply (DPS) power supply circuits to the power supply of RTC system, the power supply that the equipment of MCU control simultaneously provides charges to described RC charge-discharge circuit, and described battery feed circuit and RC charge-discharge circuit all do not provide power supply for described RTC system power supply.
Further, after described device power, also perform automatically to get rid of low charge alert step after performing start power management step, the described low charge alert of automatic eliminating particularly as follows:
After step 100, described device power, described MCU closes described device power supply (DPS) power supply circuits and RC charge-discharge circuit, and only by described battery feed circuit to RTC system power supply, described MCU passes through I2C-channel reads the low-voltage indicating bit of RTC system, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and opens described device power supply (DPS) power supply circuits, keeps the closed mode of RC charge-discharge circuit；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If I2C-channel miscommunication, performs step 120；
Step 110, described MCU remove low-voltage indicating bit, and now device power supply (DPS) power supply circuits and RC charge-discharge circuit are closed, after time delay a period of time, again by I2C-channel reads described low-voltage indicating bit, if now low-voltage indicating bit is not set, then it represents that set before is once set, then all goes well now, opens described device power supply (DPS) power supply circuits, keeps the closed mode of RC charge-discharge circuit；If now low-voltage indicating bit is still set, then it represents that battery has been low-voltage state, send low-voltage warning information, then open device power supply (DPS) power supply circuits, close battery feed circuit and RC charge-discharge circuit；The time of described time delay sets according to actual needs；
Step 120, I2C-channel miscommunication, described MCU opens described device power supply (DPS) power supply circuits, again low-voltage indicating bit of detection, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and keeps the open mode of device power supply (DPS) power supply circuits and keeps the closed mode of RC charge-discharge circuit；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If finding I after checking2C-channel communication or mistake, then it represents that RTC electricity fault, described MCU opens device power supply (DPS) power supply circuits and RC charge-discharge circuit, stops battery feed circuit and powers, to save battery electric quantity.
Further, step 121 is also included after described step 120, particularly as follows: described MCU will detect that RTC circuit malfunction and warning information are sent to the primary processor of equipment by the UART interface of single-chip microcomputer.
Present invention have the advantage that
The present invention adopts device power supply (DPS) power supply circuits, battery feed circuit and RC charge-discharge circuit power supply in support, effectively solve the problem that RTC system time is easily reset after equipment stock and equipment shut down, meanwhile, the present invention can investigate filtration RTC low-voltage alarm problem by mistake and be accurately judged to battery electric quantity deficiency.The present invention can also identify battery low-electricity quantity and send alarm, and by RC charging circuit as RTC back-up source, it is possible to the shutdown of reply equipment short time (within a week), ensure RTC system worked well.This device can also significantly reduce after-sales service workload.
[accompanying drawing explanation]
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is one RTC electric power controller of the present invention.
Fig. 2 is the flow chart that the present invention investigates low charge alert automatically.
[detailed description of the invention]
Embodiment one:
Referring to Fig. 1, a kind of RTC electric power controller, it is suitable in the RTC system of equipment, and described electric power controller includes device power supply (DPS) power supply circuits 1, RC charge-discharge circuit 2, battery feed circuit 3 and a MCU；Described device power supply (DPS) power supply circuits 1 connect battery feed circuit 3 and RC charge-discharge circuit 2 respectively, described RC charge-discharge circuit 2 is additionally coupled to device power supply (DPS) power supply circuits 1 and forms to be connected the junction point A of RTC chip U1 feeder ear on the connecting line of battery feed circuit 3 and on described connecting line, described device power supply (DPS) power supply circuits 1, battery feed circuit 3 and RTC chip U1 are all controlled by described MCU, and described RTC chip U1 is the master chip of RTC system.Described battery feed circuit 3 is generally adopted button cell.
In the present embodiment, described device power supply (DPS) power supply circuits 1 are made up of resistance R1, audion Q1, communication relay LS1 and diode D1；One end of described resistance R1 connects the P1 pin of described MCU, the B pole of other end connecting triode Q1, the C pole of described audion Q1 is connected to the 2nd pin of described communication relay LS1,1st pin and the 3rd pin of described communication relay LS1 are also connected with the system power supply of equipment, 4th pin of described diode D1 and described communication relay LS1 is connected, and described diode D1 is additionally coupled to described junction point A.Described audion Q1 generally selects NPN type triode；Described diode D1 generally selects Schottky diode.
Described RC charge-discharge circuit 2 is made up of resistance R2, electric capacity CB1, diode D2, communication relay LS2, audion Q2 and resistance R4；One end of described resistance R4 connects the P2 pin of described MCU, the B pole of other end connecting triode Q2, the C pole of described audion Q2 connects the 2nd pin of described communication relay LS2, 3rd pin of described communication relay LS2 connects junction point A, 1st pin of described communication relay LS2 connects the system power supply of equipment, 5th pin of described communication relay LS2 connects one end of diode D2, the other end of described diode D2 is also respectively connected with one end of resistance R2 and the positive pole of electric capacity CB1, the other end of described resistance R2 connects described device power supply (DPS) power supply circuits 1, in the present embodiment, the other end of described resistance R2 connects described diode D1.
Described battery feed circuit 3 is made up of diode D3, resistance R3 and battery BAT, and described diode D3, resistance R3 and battery BAT are sequentially connected with, and described diode D3 is also connected with described junction point A.
Described MCU also includes SCL pin and SDA pin, and the RTC chip of described RTC system includes SCL pin and SDA pin；The SCL pin of described MCU connects the SCL pin of described RTC chip, and the SDA pin of described MCU connects the SDA pin of described RTC chip, forms described I by this two connection2C-channel.
nullDuring equipment shutdown，The step that this device is RTC system power supply is: the P1 pin output low level of described MCU，3rd pin of described communication relay LS1 and the 4th pin disconnect，Described device power supply (DPS) power supply circuits 1 can not be RTC system power supply，The P2 pin output low level of described MCU，3rd pin of described communication relay LS2 and the conducting of the 4th pin，Described electric capacity CB1 passes through diode D2 and described communication relay LS2 to RTC system power supply，When electric capacity CB1 voltage is more than described battery BAT voltage，Described diode D3 is not turned on，Only by described RC charge-discharge circuit to RTC system power supply，When electric capacity CB1 voltage is equal to described battery BAT voltage，Described diode D2 and diode D3 is both turned on，Electric capacity CB1 and battery BAT gives RTC system power supply simultaneously，When electric capacity CB1 voltage is less than described battery BAT voltage，Described RTC system power supply is given by described battery feed circuit 3.
During device power-up, the step that this device is RTC system power supply is: after described device power, the P1 pin output high level of MCU, the P2 pin output high level of MCU, 3rd pin of described communication relay LS1 and the conducting of the 4th pin, the power supply that equipment provides passes through communication relay LS1 through communication relay LS1 and diode D1 to the power supply of RTC system, 3rd pin of described communication relay LS2 and the 4th pin disconnect, described electric capacity CB1 can not give described RTC system power supply, the power supply that equipment provides is by communication relay LS1, diode D1 and resistance R2 charges to electric capacity CB1.
Equipment is after the manufacturing; would generally there is shutdown a period of time (inventory time; road haulage time); just meeting on-line running; the such as unused time reaches one month, then after the electric capacity CB1 self discharge in RC charge-discharge circuit 2, and electricity is not enough; battery in battery feed circuit 3 then can continued power (time was more than 3 years), thus can avoid the occurrence of the problem that the time of RTC system is reset.
During equipment on-line running; often have switching on and shutting down operation; when disposable button cell electricity deficiency; MCU can detect battery low-voltage, and sends warning information prompting replacing battery, during battery is not changed; after equipment shutdown; by RC charge-discharge circuit to RTC system power supply, power-on time can continue more than one week, so can avoid the occurrence of the problem that RTC time is reset.
Referring to Fig. 2, the step realizing automatically investigating low charge alert by this device is:
After step 100, described device power, described MCU closes described device power supply (DPS) power supply circuits 1 and RC charge-discharge circuit 2, is only given RTC system power supply by described battery feed circuit 3, and described MCU passes through I2C-channel reads the low-voltage indicating bit of RTC system, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and opens described device power supply (DPS) power supply circuits 1, keeps the closed mode of RC charge-discharge circuit 2；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If I2C-channel miscommunication, performs step 120；Described set refers to: refer to that arranging low-voltage indicating bit is 1, for instance, when low-voltage indicating bit is 0, expression system is not in low-voltage state；When low-voltage indicating bit is 1, expression system is in low-voltage state；
Step 110, described MCU remove low-voltage indicating bit, and now device power supply (DPS) power supply circuits 1 and RC charge-discharge circuit 2 are closed, after time delay a period of time, again by I2C-channel reads described low-voltage indicating bit, if now low-voltage indicating bit is not set, then it represents that set before is once set, then all goes well now, opens described device power supply (DPS) power supply circuits 1, keeps the closed mode of RC charge-discharge circuit 2；If now low-voltage indicating bit is still set, then it represents that battery has been low-voltage state, send low-voltage warning information, then open device power supply (DPS) power supply circuits 1, close battery feed circuit 3 and RC charge-discharge circuit 2；The time of described time delay sets according to actual needs, for instance, set delay time as 200ms；
Step 120, I2C-channel miscommunication, described MCU opens described device power supply (DPS) power supply circuits 1, again low-voltage indicating bit of detection, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and keeps the open mode of device power supply (DPS) power supply circuits 1 and keeps the closed mode of RC charge-discharge circuit 2；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If finding I after checking2C-channel communication or mistake, then it represents that RTC electricity fault (acquiescence RTC system low-voltage), described MCU opens device power supply (DPS) power supply circuits 1 and RC charge-discharge circuit 2, stops battery feed circuit 3 and powers, to save battery electric quantity.
Step 121, described MCU will detect that RTC circuit malfunction and warning information are sent to the primary processor of equipment by the UART interface of single-chip microcomputer.
RTC low-voltage alarm problem by mistake can be investigated by above-mentioned steps and be accurately judged to battery electric quantity deficiency, starting alarm prompt and change battery, and filter out some low-voltage caused by interference alarm erroneous judgement information.When battery electric quantity deficiency, the short time shutdown of equipment can be tackled by RC charge-discharge circuit, ensure the normal operation of RTC.
Embodiment two:
Refer to Fig. 1, a kind of RTC method for managing power supply, this management method is based on a kind of RTC electric power controller and realizes, described electric power controller its suitable in the RTC system of equipment, described RTC electric power controller includes device power supply (DPS) power supply circuits 1, battery feed circuit 3, RC charge-discharge circuit 2 and a MCU；Described method for managing power supply includes shutdown power management step and start power management step；
Described shutdown power management step is: during equipment shutdown, if the voltage of described RC charge-discharge circuit 2 output is higher than the voltage of described battery feed circuit output, then RC charge-discharge circuit 2 gives the power supply of RTC system, if the voltage of described RC charge-discharge circuit 2 output is equal to the voltage of described battery feed circuit 3 output, then RC charge-discharge circuit 2 and battery feed circuit 3 give the power supply of RTC system simultaneously, if the voltage that the voltage of described RC charge-discharge circuit 2 output exports less than described battery feed circuit 3, described battery feed circuit 3 give described RTC system power supply；
Described RC charge-discharge circuit 2 is made up of resistance R2, electric capacity CB1, diode D2, communication relay LS2, audion Q2 and resistance R4；One end of described resistance R4 connects the P2 pin of described MCU, the B pole of other end connecting triode Q2, the C pole of described audion Q2 connects the 2nd pin of described communication relay LS2, 3rd pin of described communication relay LS2 connects junction point A, 1st pin of described communication relay LS2 connects the system power supply of equipment, 5th pin of described communication relay LS2 connects one end of diode D2, the other end of described diode D2 is also respectively connected with one end of resistance R2 and the positive pole of electric capacity CB1, the other end of described resistance R2 connects described device power supply (DPS) power supply circuits 1, in the present embodiment, the other end of described resistance R2 connects described diode D1.
Described battery feed circuit 3 is made up of diode D3, resistance R3 and battery BAT, and described diode D3, resistance R3 and battery BAT are sequentially connected with, and described diode D3 is also connected with described junction point A
Described shutdown power management step particularly as follows:
nullDuring equipment shutdown，The P1 pin output low level of described MCU，3rd pin of described communication relay LS1 and the 4th pin disconnect，Described device power supply (DPS) power supply circuits 1 can not be RTC system power supply，The P2 pin output low level of described MCU，3rd pin of described communication relay LS2 and the conducting of the 4th pin，Described electric capacity CB1 passes through diode D2 and described communication relay LS2 to RTC system power supply，When electric capacity CB1 voltage is more than described battery BAT voltage，Described diode D3 is not turned on，Only by described RC charge-discharge circuit to RTC system power supply，When electric capacity CB1 voltage is equal to described battery BAT voltage，Described diode D2 and diode D3 is both turned on，Electric capacity CB1 and battery BAT gives RTC system power supply simultaneously，When electric capacity CB1 voltage is less than described battery BAT voltage，Described RTC system power supply is given by described battery feed circuit 3.
Described start power management step is: after described device power, MCU controls the power supply of equipment offer by described device power supply (DPS) power supply circuits 1 to the power supply of RTC system, MCU controls the power supply of equipment offer to described RC charge-discharge circuit charging 2 simultaneously, and described battery feed circuit 3 and RC charge-discharge circuit 2 all do not provide power supply for described RTC system power supply.
Described device power supply (DPS) power supply circuits 1 are particularly as follows: described device power supply (DPS) power supply circuits 1 are made up of resistance R1, audion Q1, communication relay LS1 and diode D1；One end of described resistance R1 connects the P1 pin of described MCU, the B pole of other end connecting triode Q1, the C pole of described audion Q1 is connected to the 2nd pin of described communication relay LS1,1st pin and the 3rd pin of described communication relay LS1 are also connected with the system power supply of equipment, 4th pin of described diode D1 and described communication relay LS1 is connected, and described diode D1 is additionally coupled to described junction point A.Described audion Q1 generally selects NPN type triode, and described diode D1 generally selects Schottky diode.
Described start power management step is: after described device power, the P1 pin output high level of MCU, the P2 pin output high level of MCU, 3rd pin of described communication relay LS1 and the conducting of the 4th pin, the power supply that equipment provides passes through communication relay LS1 through communication relay LS1 and diode D1 to the power supply of RTC system, 3rd pin of described communication relay LS2 and the 4th pin disconnect, described electric capacity CB1 can not give described RTC system power supply, and the power supply that equipment provides is charged to electric capacity CB1 by communication relay LS1, diode D1 and resistance R2.
Described MCU also includes SCL pin and SDA pin, and the RTC chip U1 of described RTC system includes SCL pin and SDA pin；The SCL pin of described MCU connects the SCL pin of described RTC chip U1, and the SDA pin of described MCU connects the SDA pin of described RTC chip U1, forms described I by this two connection2C-channel.
Referring to Fig. 2, the step realizing automatically investigating low charge alert by this device is:
After step 100, described device power, described MCU closes described device power supply (DPS) power supply circuits 1 and RC charge-discharge circuit 2, is only given RTC system power supply by described battery feed circuit 3, and described MCU passes through I2C-channel reads the low-voltage indicating bit of RTC system, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and opens described device power supply (DPS) power supply circuits 1, keeps the closed mode of RC charge-discharge circuit 2；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If I2C-channel miscommunication, performs step 120；Described set refers to: refer to that arranging low-voltage indicating bit is 1, for instance, when low-voltage indicating bit is 0, expression system is not in low-voltage state；When low-voltage indicating bit is 1, expression system is in low-voltage state；
Step 110, described MCU remove low-voltage indicating bit, and now device power supply (DPS) power supply circuits 1 and RC charge-discharge circuit 2 are closed, after time delay a period of time, again by I2C-channel reads described low-voltage indicating bit, if now low-voltage indicating bit is not set, then it represents that set before is once set, then all goes well now, opens described device power supply (DPS) power supply circuits 1, keeps the closed mode of RC charge-discharge circuit 2；If now low-voltage indicating bit is still set, then it represents that battery has been low-voltage state, send low-voltage warning information, then open device power supply (DPS) power supply circuits 1, close battery feed circuit 3 and RC charge-discharge circuit 2；The time of described time delay sets according to actual needs, for instance, set delay time as 200ms；
Step 120, I2C-channel miscommunication, described MCU opens described device power supply (DPS) power supply circuits 1, again low-voltage indicating bit of detection, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and keeps the open mode of device power supply (DPS) power supply circuits 1 and keeps the closed mode of RC charge-discharge circuit 2；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If finding I after checking2C-channel communication or mistake, then it represents that RTC electricity fault (acquiescence RTC system low-voltage), described MCU opens device power supply (DPS) power supply circuits 1 and RC charge-discharge circuit 2, stops battery feed circuit 3 and powers, to save battery electric quantity.
Step 121, described MCU will detect that RTC circuit malfunction and warning information are sent to the primary processor of equipment by the UART interface of single-chip microcomputer.
RTC low-voltage alarm problem by mistake can be investigated by above-mentioned steps and be accurately judged to battery electric quantity deficiency, starting alarm prompt and change battery, and filter out some low-voltage caused by interference alarm erroneous judgement information.When battery electric quantity deficiency, the short time shutdown of equipment can be tackled by RC charge-discharge circuit, ensure the normal operation of RTC.
Present invention have the advantage that
The present invention adopts device power supply (DPS) power supply circuits, battery feed circuit and RC charge-discharge circuit power supply in support, effectively solve the problem that RTC system time is easily reset after equipment stock and equipment shut down, meanwhile, the present invention can investigate filtration RTC system low-voltage alarm problem by mistake and be accurately judged to battery electric quantity deficiency.The present invention can also identify battery low-electricity quantity and send alarm, and by RC charging circuit as RTC back-up source, it is possible to the shutdown of reply equipment short time (within a week), ensure RTC system worked well.This device can also significantly reduce after-sales service workload.
Although the foregoing describing the specific embodiment of the present invention; but those familiar with the art is to be understood that; we are merely exemplary described specific embodiment; rather than for the restriction to the scope of the present invention; those of ordinary skill in the art, in the equivalent modification made according to the spirit of the present invention and change, should be encompassed in the scope of the claimed protection of the present invention.
Claims (10)
1. a RTC electric power controller, it is suitable in the RTC system of equipment, it is characterised in that: described electric power controller includes device power supply (DPS) power supply circuits, a battery feed circuit, a RC charge-discharge circuit and a MCU；Described device power supply (DPS) power supply circuits connect battery feed circuit and RC charge-discharge circuit respectively, described RC charge-discharge circuit is additionally coupled to device power supply (DPS) power supply circuits and forms to be connected the junction point A of RTC chip feeder ear on the connecting line of battery feed circuit and on described connecting line, described device power supply (DPS) power supply circuits, battery feed circuit and RTC chip are all controlled by described MCU, and described RTC chip is the master chip of RTC system；
During equipment shutdown, if the voltage of described RC charge-discharge circuit output is higher than the voltage of described battery feed circuit output, then RC charge-discharge circuit is to the power supply of RTC system, if the voltage of described RC charge-discharge circuit output is equal to the voltage of described battery feed circuit output, then RC charge-discharge circuit and battery feed circuit give the power supply of RTC system simultaneously, if the voltage that the voltage of described RC charge-discharge circuit output exports less than described battery feed circuit, described battery feed circuit give described RTC system power supply.
2. a kind of RTC electric power controller according to claim 1, it is characterised in that: described device power supply (DPS) power supply circuits are made up of resistance R1, audion Q1, communication relay LS1 and diode D1；One end of described resistance R1 connects the P1 pin of described MCU, the B pole of other end connecting triode Q1, the C pole of described audion Q1 is connected to the 2nd pin of described communication relay LS1, the E pole ground connection of described audion Q1,1st pin and the 3rd pin of described communication relay LS1 are also connected with the system power supply of equipment, 4th pin of described diode D1 and described communication relay LS1 is connected, and described diode D1 is additionally coupled to described junction point A.
3. a kind of RTC electric power controller according to claim 2, it is characterised in that: described audion Q1 is NPN type triode.
4. a kind of RTC electric power controller according to claim 2, it is characterised in that: described diode D1 is Schottky diode.
5. a kind of RTC electric power controller according to claim 1, it is characterised in that: described RC charge-discharge circuit is made up of resistance R2, electric capacity CB1, diode D2, communication relay LS2, audion Q2 and resistance R4；One end of described resistance R4 connects the P2 pin of described MCU, the B pole of other end connecting triode Q2, the C pole of described audion Q2 connects the 2nd pin of described communication relay LS2, the E pole ground connection of described audion Q2, 3rd pin of described communication relay LS2 connects junction point A, 1st pin of described communication relay LS2 connects the system power supply of equipment, 5th pin of described communication relay LS2 connects one end of diode D2, the other end of described diode D2 is also respectively connected with one end of resistance R2 and the positive pole of electric capacity CB1, the other end of described resistance R2 connects described device power supply (DPS) power supply circuits.
6. a kind of RTC electric power controller according to claim 1, it is characterized in that: described battery feed circuit is made up of diode D3, resistance R3 and battery BAT, described diode D3, resistance R3 and battery BAT are sequentially connected with, and described diode D3 is also connected with described junction point A.
7. a kind of RTC electric power controller according to claim 1, it is characterised in that: described MCU also includes SCL pin and SDA pin, and the RTC chip of described RTC system includes SCL pin and SDA pin；The SCL pin of described MCU connects the SCL pin of described RTC chip, and the SDA pin of described MCU connects the SDA pin of described RTC chip, forms I by this two connection2C-channel.
8. a RTC method for managing power supply, it is characterized in that: this management method is based on a kind of RTC electric power controller and realizes, described electric power controller its suitable in the RTC system of equipment, described RTC electric power controller includes device power supply (DPS) power supply circuits, a battery feed circuit, a RC charge-discharge circuit and a MCU；Described method for managing power supply includes shutdown power management step and start power management step；
Described shutdown power management step is: during equipment shutdown, if the voltage of described RC charge-discharge circuit output is higher than the voltage of described battery feed circuit output, then RC charge-discharge circuit is to the power supply of RTC system, if the voltage of described RC charge-discharge circuit output is equal to the voltage of described battery feed circuit output, then RC charge-discharge circuit and battery feed circuit give the power supply of RTC system simultaneously, if the voltage that the voltage of described RC charge-discharge circuit output exports less than described battery feed circuit, described battery feed circuit give described RTC system power supply；
Described start power management step is: after described device power, MCU controls the power supply of equipment offer by described device power supply (DPS) power supply circuits to the power supply of RTC system, the power supply that the equipment of MCU control simultaneously provides charges to described RC charge-discharge circuit, and described battery feed circuit and RC charge-discharge circuit all do not provide power supply for described RTC system power supply.
9. a kind of RTC method for managing power supply according to claim 8, it is characterised in that: after described device power, also perform automatically to get rid of low charge alert step after performing start power management step, the described low charge alert of automatic eliminating particularly as follows:
After step 100, described device power, described MCU closes described device power supply (DPS) power supply circuits and RC charge-discharge circuit, and only by described battery feed circuit to RTC system power supply, described MCU passes through I2C-channel reads the low-voltage indicating bit of RTC system, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and opens described device power supply (DPS) power supply circuits, keeps the closed mode of RC charge-discharge circuit；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If I2C-channel miscommunication, performs step 120；
Step 110, described MCU remove low-voltage indicating bit, and now device power supply (DPS) power supply circuits and RC charge-discharge circuit are closed, after time delay a period of time, again by I2C-channel reads described low-voltage indicating bit, if now low-voltage indicating bit is not set, then it represents that set before is once set, then all goes well now, opens described device power supply (DPS) power supply circuits, keeps the closed mode of RC charge-discharge circuit；If now low-voltage indicating bit is still set, then it represents that battery has been low-voltage state, send low-voltage warning information, then open device power supply (DPS) power supply circuits, close battery feed circuit and RC charge-discharge circuit；The time of described time delay sets according to actual needs；
Step 120, I2C-channel miscommunication, described MCU opens described device power supply (DPS) power supply circuits, again low-voltage indicating bit of detection, if I2C-channel communication is normal, and described low-voltage indicating bit is not set, then it represents that all go well, and keeps the open mode of device power supply (DPS) power supply circuits and keeps the closed mode of RC charge-discharge circuit；If I2C-channel communication is normal, and described low-voltage indicating bit is set, then it represents that too low voltage alarm occurs in RTC system, performs step 110；If finding I after checking2C-channel communication or mistake, then it represents that RTC electricity fault, described MCU opens device power supply (DPS) power supply circuits and RC charge-discharge circuit, stops battery feed circuit and powers, to save battery electric quantity.
10. a kind of RTC method for managing power supply according to claim 9, it is characterized in that: also include step 121 after described step 120, particularly as follows: described MCU will detect that RTC circuit malfunction and warning information are sent to the primary processor of equipment by the UART interface of single-chip microcomputer.
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| CN106293796B (en) * | 2015-06-10 | 2019-11-26 | 联想(北京)有限公司 | A kind of information processing method and electronic equipment |
| CN106354075B (en) * | 2016-11-25 | 2020-01-21 | 北京意同创科技有限公司 | Remote controller control circuit with backlight screen |
| CN111836347B (en) * | 2020-06-16 | 2024-07-16 | 厦门汉印电子技术有限公司 | Electric quantity display method, device, equipment and readable storage medium |
| CN112366803A (en) * | 2020-11-06 | 2021-02-12 | 杭州叙简未兰电子有限公司 | Power supply method, power supply circuit and law enforcement recorder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5905365A (en) * | 1997-10-28 | 1999-05-18 | Twinhead International Corp. | Real time-clock power supply device |
| CN1804574A (en) * | 2006-01-19 | 2006-07-19 | 湖南大学 | Method and apparatus for measuring running performance parameters of hybrid electric vehicle |
| CN200947549Y (en) * | 2006-09-07 | 2007-09-12 | 安凯（广州）软件技术有限公司 | Power supply circuit of double voltage source real-time clock circuit |
| CN201063794Y (en) * | 2007-07-16 | 2008-05-21 | 浙江三维通信股份有限公司 | Mobile communications network overlapping effect remote dial testing system |
| CN103607037A (en) * | 2013-11-01 | 2014-02-26 | 恒动能源（深圳）有限公司 | Switching apparatus of UPS power supply |
| CN103944254A (en) * | 2014-04-15 | 2014-07-23 | 福建星网视易信息***有限公司 | Power-fail protection circuit and device |
-
2014
- 2014-10-31 CN CN201410603758.4A patent/CN104333112B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5905365A (en) * | 1997-10-28 | 1999-05-18 | Twinhead International Corp. | Real time-clock power supply device |
| CN1804574A (en) * | 2006-01-19 | 2006-07-19 | 湖南大学 | Method and apparatus for measuring running performance parameters of hybrid electric vehicle |
| CN200947549Y (en) * | 2006-09-07 | 2007-09-12 | 安凯（广州）软件技术有限公司 | Power supply circuit of double voltage source real-time clock circuit |
| CN201063794Y (en) * | 2007-07-16 | 2008-05-21 | 浙江三维通信股份有限公司 | Mobile communications network overlapping effect remote dial testing system |
| CN103607037A (en) * | 2013-11-01 | 2014-02-26 | 恒动能源（深圳）有限公司 | Switching apparatus of UPS power supply |
| CN103944254A (en) * | 2014-04-15 | 2014-07-23 | 福建星网视易信息***有限公司 | Power-fail protection circuit and device |
Non-Patent Citations (1)
| Title |
|---|
| 基于单片机C8051F 的智能温控***的设计与实现;赵跃齐等;《计算机测量与控制》;20090331;第17卷(第3期);第490-491页 * |
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