JPS604232A - Method for designating test mode of lsi - Google Patents

Method for designating test mode of lsi

Info

Publication number
JPS604232A
JPS604232A JP58112163A JP11216383A JPS604232A JP S604232 A JPS604232 A JP S604232A JP 58112163 A JP58112163 A JP 58112163A JP 11216383 A JP11216383 A JP 11216383A JP S604232 A JPS604232 A JP S604232A
Authority
JP
Japan
Prior art keywords
test
input
test mode
specified
signals
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.)
Pending
Application number
JP58112163A
Other languages
Japanese (ja)
Inventor
Shinji Nishibe
西部 晋二
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
Original Assignee
Toshiba 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 filed Critical Toshiba Corp
Priority to JP58112163A priority Critical patent/JPS604232A/en
Publication of JPS604232A publication Critical patent/JPS604232A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L22/00Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Testing Of Individual Semiconductor Devices (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
  • Semiconductor Integrated Circuits (AREA)

Abstract

PURPOSE:To enable to perform the function for designating an arbitrary test mode without necessity of specified arrangement of pins for exclusive use of test by decoding input signals of specified several input pins which are predetermined to detect several kinds of bit patterns which are hardly available in usual operation. CONSTITUTION:Among the signals inputted in input and output pins 1011-101N of the LSI100, the signals inputted in the predetermined three input pins 101i, 101j and 101k are inputted in a decoder 104 through input signal lines 103i, 103j and 103k respectively, and detection signals are outputted from one decode output terminal corresponding to the bit pattern of said signals inputted in the decoder 104. At this time, when a bit pattern of the input signal is a test mode designating signal consisting of a specified bit pattern which is hardly available in a usual operation, a specified decode output terminal being applicable to that, e.g. D5 outputs detection signals, which becomes a designating signal TEST-1 of test mode-1 to start the predetermined test function operation.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本’Jb明は髄′しこLSI (Large 5cal
e Integration)のテストモード指示子1
々を改良したLSIのテストモード指定方式にIN、1
する。
[Detailed Description of the Invention] [Technical Field of the Invention] This Jb light is the core of the LSI (Large 5 cal
e Integration) test mode indicator 1
IN, 1 is an improved LSI test mode specification method.
do.

〔発明の技術的静思とその問題点〕[Technical thoughts on the invention and its problems]

一般に、LSIの試験には膨大す址のテストデータを必
−安とし、これに伴って多くの試験時間を必装とする。
Generally, testing of LSI requires a huge amount of test data, which requires a lot of testing time.

そこでDL来では、テストデータの圧縮化を計るべく、
LSSD (Level 5ensitiveScan
 Design )方式を採用し、専用のテストビ/を
用いてテストを行なう手段が探られている。
Therefore, in order to compress the test data in DL,
LSSD (Level 5 sensitive scan
A method of conducting tests using a dedicated test machine is currently being explored.

しかしながら、このような従来のテスト手段においては
、LSIの限られた入出力ビンのうち、榎数のビンをテ
スト専用ビンとして割付けなければならず、入出力ビン
の4T効利用が損われ、これに伴いチップのイ良能性が
一1tjわれるという大きな問題があった。
However, in such conventional test means, among the limited input/output bins of the LSI, Enoki's bins must be allocated as test-only bins, which impairs the 4T efficiency of the input/output bins. As a result, there was a major problem in that the performance of the chip was reduced by 11tj.

〔発明の目的〕[Purpose of the invention]

本発明は上記実情に(べみなされたもので、テスト専用
ピンを割付けることなく、問!l−な磯、i1毛回路を
付加するのみで、仮故神のデストシードを任意に設定す
ることのできるLSIのテストモード指定方式を提供す
ることを目的とする。
The present invention has been developed based on the above-mentioned situation, and it is possible to arbitrarily set the death seed of a pseudo-dead god by simply adding a Q!l-Iso and i1-hair circuit without allocating a test-dedicated pin. The purpose of this invention is to provide an LSI test mode designation method that allows the following.

〔発明の概要〕[Summary of the invention]

本発明は、板数の人力ビンからの人力悟号のうち、予め
定めだ数個の特定人カビ′ンの人力信号をデコードして
、通常動作ではあり得ない数種のビットパターンを]莢
出し、そのデコード出力をそれぞれテストモー1″′指
足信号として用いる41’を成としたもので、これによ
り、テスト等用ビンの割付りを−リノ必要とせずに、任
意のテスト1ニード4旨シ、己イ表能を実現できる。
The present invention decodes the human power signals of a predetermined number of specific people from among the human power words from the human power bins of the number of boards, and generates several kinds of bit patterns that cannot occur in normal operation. 41' to use the decoded output as the test mode 1''' finger/toe signal.This allows any test 1 need 4 to be assigned without the need to allocate bins for tests, etc. You can realize your own self-expression ability.

〔発明(/−1実h「1」例〕 以下1′’41而をジ8照して本発明の一実施例を説明
する。図は本発明の一実施例葡示したもので、図中、1
0oはフルカスタム又はセミカスタムによるLSI 、
 101..1012、−.101Nはそれぞれ人力ビ
ン、102. + 7022.・1702Mはそれ宅れ
出力ビンである。1031.103j。
[Invention (/-1 Actual Example 1)] An embodiment of the present invention will be described below with reference to 1''41.The figure shows an embodiment of the present invention. Medium, 1
0o is a fully custom or semi-custom LSI,
101. .. 1012, -. 101N is a manual bottle, 102. +7022.・1702M is a separate output bin. 1031.103j.

10.7には上記人力ビン1011.1θ12+・・・
In 10.7, the above human power bin 1011.1θ12+...
.

101 Nのうち、予めフ九ばれた3個の入力ビン(1
011,1θlj、1olk)につながる入カ信シ)ラ
イン、104はこの入力信号ライン103・1 103J、103にの谷1[1号全入力しデコードする
デコーダである。この際、デコーダ104の入力端につ
ながれる3本の入力信号ライン103・1 1033.103にの組合わせは、通常動作時において
起こり得ないビットパターンを少くとも3種以上設定で
きるようなものが選ばれる。上記デコーダ104は上記
人カイ1号ライン1o3゜103j、103に上の3種
の人力18号をデコードし、通常動作時において起こシ
得ない3 j+9のビットzP ターンの検出信号を牛
テ定のテ゛コート出力端D51 D6 + D7 より
スヘ択的に出力するもので、との%定のデコード出力☆
1IiiD5 r JJ6 r D7より得られる検出
1,1号が、それぞれ特定のテストモ)” k 指定す
るテストモート(a 号(TEST −7、TEST 
−、? 、 TEST −3)として用いられる。
101 N, three input bins (1
011, 1θlj, 1olk), and 104 is a decoder that inputs all the valleys 1 [1] to these input signal lines 103, 1, 103J, and 103 and decodes them. At this time, the combination of the three input signal lines 103.1 1033.103 connected to the input terminal of the decoder 104 is such that at least three types of bit patterns that cannot occur during normal operation can be set. To be elected. The decoder 104 decodes the above three types of human power No. 18 on the human power No. 1 lines 1o3゜103j, 103, and outputs the detection signal of the bit zP turn of 3j+9, which cannot occur during normal operation, as It selectively outputs from the code output terminal D51 D6 + D7, and the decoding output is fixed in %☆
1IiiiD5 r JJ6 r Detection No. 1 and No. 1 obtained from D7 are respectively specific test motes)" k Specified test motes (a (TEST -7, TEST
-,? , TEST-3).

ここで図面を参照して一実施例の動作を説明する。LS
I100の各人出カビ71 (711+ 1012+・
・・、101Nに入力された信号のうち、予め定められ
た3個の入力ビン(10111101j、101k)に
入力された信号はそれぞれ人力信号ライン1030,1
o3□、103kを介してデコーダ104に人力される
。デコーダ104は人力された信号をデコードし、その
ビットパターンに対応する一つのデコード出方端よシ検
出信号を出力する。この際、デコーダ104に人力され
た3ビツトの入力信号のビッレぐターンが、通′、・i
動作ではあり得ない’F定のビットパターンでなるテス
トモード相別1゜号でろろと、そのビット・ぐターンに
1痰当−する’l’:+定のデコード出ノル喘(例えば
Ds)よりtit出イ、1けか出力される。このデコー
ド出力端1〕5の(矢田伯−号はテストモート−1の指
定信号となり、このテストモード化け(TEST −2
) r(より、予め足められたテスト機能1山作が開始
される。このテスト機能には、1りUえは力1ンンタチ
ェインり分’5ill l 1li11411フリ、)
゛フロ、ノ状四の外部への出力、レソスクのデークセッ
ト/リード等があり、これらのテスト機11ヒがブ゛コ
ーダ104のテ゛コード出力端1)5 + D6 +1
)7より出力ネれるテストモード伯号(TEST−1。
The operation of one embodiment will now be described with reference to the drawings. L.S.
I100 each person's mold 71 (711+ 1012+・
..., 101N, the signals input to three predetermined input bins (10111101j, 101k) are respectively input to human signal lines 1030, 101N.
It is manually input to the decoder 104 via o3□ and 103k. The decoder 104 decodes the manually input signal and outputs one decode output end detection signal corresponding to the bit pattern. At this time, the billet turns of the 3-bit input signal input to the decoder 104 are
When the test mode is 1° with a constant bit pattern of 'F', which is impossible in operation, one sputum is applied to that bit/turn, 'l': + constant decode output (for example, Ds) When the tit is output, one digit is output. This decode output terminal 1]5's (Yada Haku-) becomes the designated signal for test mode-1, and this test mode transformation (TEST-2
) r (The pre-added test function 1 stack is started. This test function has 1 input and 1 input chain '5ill l 1li11411,)
There are outputs to the outside of ``FROM'', ``4'', and data sets/reads for RESOS.
) 7 output test mode number (TEST-1).

rgsT−z 、 TEST −3) Itcx リ選
択的ニ実施すれる。
rgsT-z, TEST-3) Itcx is selectively implemented.

このようなテストモード指定手段により、テスト用の人
力ビンを設りることなく、各種のテストモードを指定で
き、入出力ビンを有効に用いて任意の試験機能を実現で
きる。
With such a test mode specifying means, various test modes can be specified without providing a manual bin for testing, and an arbitrary test function can be realized by effectively using input/output bins.

尚、上記した実施例においては、特定の3種の入71号
をデコードし、ぞのデコード出力のうち、特定3稗のビ
ット・ξターンに4コ応するデコード出力をテストモー
トイrj号(’l’EsT−1,TEST−2、TES
T −3)としているか、これに限るものではなく、任
意の設定がIIJ能でJ)る。
In the above-mentioned embodiment, three specific input numbers 71 are decoded, and among the decoded outputs, four decoded outputs corresponding to the specific three bits/ξ turns are sent to the test motor number rj ( 'l'EsT-1, TEST-2, TES
T-3), but it is not limited to this, and any setting can be made.

〔発明の効果」 以上連記したように本発明によるLSIのテストモード
指定方式によれは、仮数の入力ビンからの入力信号のう
ち、予め定めだ数個の特定入力ビンの入力1ε7号をデ
コードして、1(11常動作ではあり得ない数種のピノ
トノやターンヶ検出し、そのデコード出力をそれぞ社テ
スト七−ド指冗1a号として用いる4417成とじン一
二ことにより、テスト専用ビンの割付けを一切必′堤と
せずにIJ意のテストモード指定様能を′〕5現でき、
これより入出力ビンを有効に利用して内部(釧屯奮拡充
できる。
[Effects of the Invention] As mentioned above, according to the LSI test mode designation method according to the present invention, inputs 1ε7 of a predetermined number of specific input bins are decoded among the input signals from the mantissa input bins. 1 (11) Detects several types of pinots and turns that cannot occur in normal operation, and uses the decoded output as the 4417 test number 1a. It is possible to specify the test mode of IJ without requiring any allocation,
This allows for effective use of input/output bins for internal expansion.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の一実施例におりる要部の回路購成を示す図
である。 1 θ 0・・ LSI 、101. .1012. 
・ + 101N・・人カビ/、102..1θ22.
”’+ 102.、、・・出力ピン、103□、Itノ
3J、 / 0 、ik・ 人力1g号ライン、104
・−デコーダ、TEST −1、TEST −2、TE
ST −、? テスト4−−ド1.1号。 出願人代理人 弁理士 F+i KL 八 IX101
41(Yl
The figure is a diagram showing the circuit purchase of main parts in one embodiment of the present invention. 1 θ 0...LSI, 101. .. 1012.
・ + 101N...human mold/, 102. .. 1θ22.
``'+ 102.,... Output pin, 103□, It-3J, / 0, ik・Manpower No. 1g line, 104
・-Decoder, TEST-1, TEST-2, TE
ST-,? Test 4--Do No. 1.1. Applicant's agent Patent attorney F+i KL 8 IX101
41(Yl

Claims (1)

【特許請求の範囲】[Claims] LSI内部に、’Si一定の榎数の入力ビンの組合わせ
信号をデコードするデコーダを設け、i亥デコーダのデ
コード出力のうぢ、通常動作において・i?3生ずるこ
とのないデコー ド出力をテストモード指定信号として
用いることを%徴とするLSIの1ストモ一ド1旨定方
式。
A decoder is provided inside the LSI to decode a combination signal of a fixed number of input bins, and in normal operation, the decoded output of the i? 3. This is a method for determining one mode per LSI, which uses a decoded output that never occurs as a test mode designation signal.
JP58112163A 1983-06-22 1983-06-22 Method for designating test mode of lsi Pending JPS604232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58112163A JPS604232A (en) 1983-06-22 1983-06-22 Method for designating test mode of lsi

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58112163A JPS604232A (en) 1983-06-22 1983-06-22 Method for designating test mode of lsi

Publications (1)

Publication Number Publication Date
JPS604232A true JPS604232A (en) 1985-01-10

Family

ID=14579817

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58112163A Pending JPS604232A (en) 1983-06-22 1983-06-22 Method for designating test mode of lsi

Country Status (1)

Country Link
JP (1) JPS604232A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61256268A (en) * 1985-05-09 1986-11-13 Nec Corp Testing apparatus
JPH07146344A (en) * 1993-11-25 1995-06-06 Nec Corp Logic circuit and its testing method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760865A (en) * 1980-09-30 1982-04-13 Nec Corp Integrated circuit device
JPS5787150A (en) * 1980-11-19 1982-05-31 Matsushita Electric Ind Co Ltd Large-scale integrated circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5760865A (en) * 1980-09-30 1982-04-13 Nec Corp Integrated circuit device
JPS5787150A (en) * 1980-11-19 1982-05-31 Matsushita Electric Ind Co Ltd Large-scale integrated circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61256268A (en) * 1985-05-09 1986-11-13 Nec Corp Testing apparatus
JPH07146344A (en) * 1993-11-25 1995-06-06 Nec Corp Logic circuit and its testing method

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