JPS6467797A - Semiconductor memory device - Google Patents

Semiconductor memory device

Info

Publication number
JPS6467797A
JPS6467797A JP22552987A JP22552987A JPS6467797A JP S6467797 A JPS6467797 A JP S6467797A JP 22552987 A JP22552987 A JP 22552987A JP 22552987 A JP22552987 A JP 22552987A JP S6467797 A JPS6467797 A JP S6467797A
Authority
JP
Japan
Prior art keywords
data
memory cell
read
dummy
state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP22552987A
Other languages
Japanese (ja)
Other versions
JPH07105147B2 (en
Inventor
Eishin Minagawa
Hiroshi Iwahashi
Masamichi Asano
Mizuho Imai
Yuichi Tatsumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Toshiba Electronic Device Solutions Corp
Original Assignee
Toshiba Corp
Toshiba Microelectronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Toshiba Microelectronics Corp filed Critical Toshiba Corp
Priority to JP22552987A priority Critical patent/JPH07105147B2/en
Priority to US07/241,748 priority patent/US4967394A/en
Priority to EP19880114825 priority patent/EP0306990A3/en
Priority to KR1019880011650A priority patent/KR910007433B1/en
Publication of JPS6467797A publication Critical patent/JPS6467797A/en
Publication of JPH07105147B2 publication Critical patent/JPH07105147B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Read Only Memory (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)

Abstract

PURPOSE:To measure data read speed without writing data in a memory cell by constituting the titled device so that data '0' is read out when a dummy row line is selected during the test mode, and data '1' is read when a row line connected to a memory cell is selected. CONSTITUTION:In addition to a memory cell array 7 constituted of nonvolatile memory cells which no electrons are injected to whose floating gate and are in a state that data '1' is stored, dummy cells set in a state equivalent to a state that data '0' is stored are provided to constitute a dummy cell array 10. The array 10 is selected by the second row decoder 11 during the test mode to measure the speed of data read. As a result, the data read speed can be accurately measured without programming in a regular memory cell array.
JP22552987A 1987-09-09 1987-09-09 Semiconductor memory device Expired - Lifetime JPH07105147B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP22552987A JPH07105147B2 (en) 1987-09-09 1987-09-09 Semiconductor memory device
US07/241,748 US4967394A (en) 1987-09-09 1988-09-08 Semiconductor memory device having a test cell array
EP19880114825 EP0306990A3 (en) 1987-09-09 1988-09-09 Semiconductor memory device with dummy cell array
KR1019880011650A KR910007433B1 (en) 1987-09-09 1988-09-09 Semiconductor memora device with dummy cell array

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22552987A JPH07105147B2 (en) 1987-09-09 1987-09-09 Semiconductor memory device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP62306165A Division JPH0677399B2 (en) 1987-09-09 1987-12-03 Semiconductor memory device

Publications (2)

Publication Number Publication Date
JPS6467797A true JPS6467797A (en) 1989-03-14
JPH07105147B2 JPH07105147B2 (en) 1995-11-13

Family

ID=16830732

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22552987A Expired - Lifetime JPH07105147B2 (en) 1987-09-09 1987-09-09 Semiconductor memory device

Country Status (1)

Country Link
JP (1) JPH07105147B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059599A (en) * 1983-09-13 1985-04-05 Nec Corp Non-volatile semiconductor memory

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6059599A (en) * 1983-09-13 1985-04-05 Nec Corp Non-volatile semiconductor memory

Also Published As

Publication number Publication date
JPH07105147B2 (en) 1995-11-13

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term