JPS60117918A - Coincidence detecting circuit - Google Patents

Coincidence detecting circuit

Info

Publication number
JPS60117918A
JPS60117918A JP22434083A JP22434083A JPS60117918A JP S60117918 A JPS60117918 A JP S60117918A JP 22434083 A JP22434083 A JP 22434083A JP 22434083 A JP22434083 A JP 22434083A JP S60117918 A JPS60117918 A JP S60117918A
Authority
JP
Japan
Prior art keywords
circuit
bits
counter
trpl
channel
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
JP22434083A
Other languages
Japanese (ja)
Other versions
JPH0416968B2 (en
Inventor
Joji Murakami
村上 丈示
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP22434083A priority Critical patent/JPS60117918A/en
Publication of JPS60117918A publication Critical patent/JPS60117918A/en
Publication of JPH0416968B2 publication Critical patent/JPH0416968B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
    • H03K19/21EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one input; COINCIDENCE circuits, i.e. giving output only if all input signals are identical
    • H03K19/215EXCLUSIVE-OR circuits, i.e. giving output if input signal exists at only one input; COINCIDENCE circuits, i.e. giving output only if all input signals are identical using field-effect transistors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To attain a high-speed operation and reduction of the power consumption with a coincidence detecting circuit by actuating a circuit totally only in case the coincidence is obtained between the state of one of plural bits of data and the prescribed conditions. CONSTITUTION:A sequence control circuit contains a circuit which detects that all output bits of a 16-bit counter are zero. The outputs of counter cells CH0, CH1-CHF are connected to the gates of n channel transistors TRN0, N1- NF respectively. Each source of these TRs is grounded drians connected in common with each other. Then these drains are connected to the drain of a p channel TRPL. This TRPL forms a ratio circuit together with TRN0-NF. The p channel TRPL is turned on only when the upper two bits of a counter circuit are set at 0. Then a current flows to the ratio circuit. In other words, all bits are never set at 0 unless said upper two bits are not zero. Thus it is not needed to flow a current to the ratio circuit.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、半導体集積装置に係シ、特に、順序制御回路
、例えばカウンタ等において一定の条件を検出する一致
検出回路に関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a semiconductor integrated device, and particularly to a coincidence detection circuit that detects a certain condition in a sequential control circuit, such as a counter.

〔従来技術と問題点〕 □ カウンタ回路においては、一定の条件、例えば、全ビッ
ト0を検出することが、しばしば必要とされる。
[Prior Art and Problems] □ In counter circuits, it is often necessary to detect a certain condition, for example, all bits are 0.

16ビツトのダウンカウンタを例にとると、OからFt
でのピットに対応するカウンタセルの全出力が0(すな
わち、0000#□x)であることの検出は、第1図の
回路構成によシ行われる。
Taking a 16-bit down counter as an example, from O to Ft
Detection that the total output of the counter cells corresponding to the pits is 0 (ie, 0000#□x) is performed by the circuit configuration shown in FIG.

第1図において、ノア回路NORは従来N1111O8
回路の場合には簡単に構成することができたが、0M0
8回路としてNORを構成する場合には、通常の方法で
は第2図に示すように構成する必要がある。第2図の回
路は、Pチャンネルトランジスタを16個たてづみした
構成になっておシ、所定の特性を得るためには、パター
ンレイアウトが難しく、かつ、占有面遺が大きくなって
しまう不都合が生じる。
In Figure 1, the NOR circuit NOR is conventionally N1111O8
In the case of a circuit, it was easy to configure, but 0M0
When configuring the NOR as 8 circuits, it is necessary to configure it as shown in FIG. 2 in the normal method. The circuit shown in Figure 2 has a configuration in which 16 P-channel transistors are stacked in a row, and in order to obtain the desired characteristics, the pattern layout is difficult and the area occupied becomes large. arise.

従って、0M08回路で第1図の回路を構成する場合に
は、低速動作の回路であれば、プリチャージ方式を用い
るとか、NORを多段構成にする等の手段がとられてい
る。しかし、高速動作が要求される0M08回路の場合
には、前記の手段を用いることができず、NORをレシ
オ回路として構成し電流を流す方法がとられている。こ
の方法では、0M08回路の低電流特性がそこなわれる
という問題がある。
Therefore, when configuring the circuit shown in FIG. 1 using the 0M08 circuit, if the circuit operates at low speed, measures such as using a precharge method or using a multi-stage NOR configuration are taken. However, in the case of an 0M08 circuit that requires high-speed operation, the above-mentioned means cannot be used, and a method is used in which the NOR is configured as a ratio circuit and current is caused to flow. This method has a problem in that the low current characteristics of the 0M08 circuit are impaired.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、前記の従来技術の問題点にかんがみ、
順序制御回路における一定の出力条件を検出する回路に
おいて、高速動作が可能でかつ消費電力を低減させるこ
とができる回路構成方法を提供することにある。
In view of the problems of the prior art described above, the object of the present invention is to
An object of the present invention is to provide a circuit configuration method that enables high-speed operation and reduces power consumption in a circuit that detects a certain output condition in a sequential control circuit.

〔発明の構成〕[Structure of the invention]

前記の目的を達成するために、本発明においては複数ピ
ットのデータが所定の条件を満足したことを検出する一
致検出回路であって、該複数ピットのうち一部分のピッ
トの状態が該所定の条件に部分一致した時のみ回路全体
を動作可能な状態にせしめる制御回路を具備することを
特徴とする一致検出回路が提供される。
In order to achieve the above object, the present invention provides a coincidence detection circuit that detects that data of a plurality of pits satisfies a predetermined condition, wherein the state of a portion of the plurality of pits satisfies the predetermined condition. There is provided a coincidence detection circuit characterized in that it includes a control circuit that makes the entire circuit operable only when there is a partial coincidence.

〔発明の実施例〕[Embodiments of the invention]

本発明の一実施例としての順序制御回路を第3図に示す
。第3図の回路は、第1図の場合と同様に16ピツトダ
ウンカウンタにおいて全出力ピットがゼロであることを
検出する回路を備えている。
FIG. 3 shows a sequential control circuit as an embodiment of the present invention. The circuit of FIG. 3 includes a circuit for detecting that all output pits are zero in the 16 pit down counter, as in the case of FIG. 1.

各カウンタセルCNo、 CN、 、・・・# CN、
の出力は、NチャンネルトランジスタN。、N1.・・
・N、 、 N。
Each counter cell CNo, CN, ,...#CN,
The output of is an N-channel transistor N. , N1.・・・
・N, , N.

のダートに接続される。各NチャンネルトランジスタN
。、N4.・・・、Nつl N、のソースは接地され、
ドレインは共通接続されPチャンネルトランジスタPL
のドレインに接続される。このPチャンネルトランジス
タPLは、各NチャンネルトランジスタN。、N1.・
・・、Nヨ、NFとレシオ回路を形成するもので、その
ソースは電源V。。に接続される。
connected to the dart. Each N-channel transistor N
. , N4. . . ., the source of N is grounded,
The drains are commonly connected to the P-channel transistor PL.
connected to the drain of This P-channel transistor PL is connected to each N-channel transistor N. , N1.・
..., Nyo, and NF form a ratio circuit, and its source is the power supply V. . connected to.

上位2ビツトのカウンタセルCNつl CN、の反転出
力がナンド回路NADに入力され、ナンド回路NADの
出力はPチャンネルトランジスタPLのダートに接続さ
れる。
The inverted outputs of the upper two bits of the counter cells CN, CN, are input to the NAND circuit NAD, and the output of the NAND circuit NAD is connected to the dart of the P-channel transistor PL.

第3図の回路においては、カウンタ回路の上位2ビツト
がともにゼロの場合にのみ、Pチャンネルトランジスタ
PLがオンとなシ、レシオ回路に電流が流れる。すなわ
ち、上位2ビツトがゼロでない場合には、全ピットがゼ
ロとなることはないので、レシオ回路に電流を流さなく
てもよい。このように構成することによシ、検出回路の
パターンレイアウトはNMO8回路の場合とほぼ同程度
であって、高速性を失うことなしで消費電流を1/4程
度に低減することができる。
In the circuit shown in FIG. 3, only when both upper two bits of the counter circuit are zero, P channel transistor PL is turned on and current flows through the ratio circuit. That is, if the upper two bits are not zero, all the pits will not be zero, so there is no need to apply current to the ratio circuit. With this configuration, the pattern layout of the detection circuit is almost the same as that of the NMO8 circuit, and the current consumption can be reduced to about 1/4 without losing high speed.

本発明の他の一つの実施例としての順序制御回路が第4
図に示される。第4図の回路は、シリアル通信における
5DLC(5ynchronous DataLink
 Control )方式の場合のフラグ(01111
110)ノfターン検出回路の例であり、sfmのシフ
トレジスタセルSFo、 SF4.・・・。
A fourth sequential control circuit as another embodiment of the present invention
As shown in the figure. The circuit in Figure 4 is a 5DLC (5 synchronous DataLink) in serial communication.
Control ) method flag (01111
110) This is an example of a turn detection circuit, and includes shift register cells SFo, SF4. ....

SF5の出力ノヤターンが検出される。この場合には、
検出回路の消費電流をIAに低減することができる。
The output noya turn of SF5 is detected. In this case,
The current consumption of the detection circuit can be reduced to IA.

本発明は、前記の例に限らず順序制御回路において、そ
の出力条件が検出回路で検出されるものに適用すること
ができる。例えば、多項式カウンタ回路、シフトレジス
タ回路、またはコンピュータの順序制御回路等に適用す
ることができる。
The present invention is not limited to the above example, but can be applied to sequential control circuits whose output conditions are detected by a detection circuit. For example, it can be applied to a polynomial counter circuit, a shift register circuit, a computer sequence control circuit, etc.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、効率の良いt4ターンレイアウトと高
速性とをそこなうことなしで、順序制御回路の出力条件
検出回路を省電力形に構成することができる。
According to the present invention, the output condition detection circuit of the sequential control circuit can be constructed in a power-saving manner without sacrificing the efficient t4 turn layout and high speed.

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

第1図は、順序制御回路の一例としての、16ビツトカ
ウンタ回路における全ピットゼロの検出回路を示し、 第2図は、CMO8回路でノア回路を構成した場合を示
し、 第3図は、第1図の順序制御回路に本発明を適用した場
合の実施例を示し、 第4図は、本発明をシリアル通信回路に適用した場合の
実施例を示す。 (符号の説明) CN、CN1.・・・、 CN、 l CN、:カウン
タセル、NOR:ノア回路、Pg + P、+ ”’ 
r Pg + Py: Pチャンネルトランジスタ、N
o、 N、 、・・・、 N、 I N。 :Nチャンネルトランジスタ、NAD二ナンド回路、P
L二Pチャンネルト2ンジスタ、SFo r8F 、・
・・#SF7:シ7トレジスタセル。
FIG. 1 shows a detection circuit for all pit zeros in a 16-bit counter circuit as an example of a sequential control circuit, FIG. 2 shows a case where a NOR circuit is configured with eight CMO circuits, and FIG. An embodiment is shown in which the present invention is applied to the sequence control circuit shown in the figure, and FIG. 4 shows an embodiment in which the present invention is applied to a serial communication circuit. (Explanation of codes) CN, CN1. ..., CN, l CN,: Counter cell, NOR: NOR circuit, Pg + P, + "'
r Pg + Py: P channel transistor, N
o, N, ,..., N, I N. :N channel transistor, NAD second NAND circuit, P
L2P channel 2 register, SFor r8F,・
...#SF7: Sheet 7 register cell.

Claims (1)

【特許請求の範囲】[Claims] 複数ビットのデータが所定の条件を満足したことを検出
する一致検出回路であって、該複数ピットのうち一部分
のピットの状態が該所定の条件に部分一致した時のみ回
路全体を動作可能な状態にせしめる制御回路を具備する
ことを特徴とする一致検出回路。
A coincidence detection circuit that detects that data of multiple bits satisfies a predetermined condition, and the entire circuit is operable only when the state of some of the plurality of pits partially matches the predetermined condition. A coincidence detection circuit characterized by comprising a control circuit for causing
JP22434083A 1983-11-30 1983-11-30 Coincidence detecting circuit Granted JPS60117918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22434083A JPS60117918A (en) 1983-11-30 1983-11-30 Coincidence detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22434083A JPS60117918A (en) 1983-11-30 1983-11-30 Coincidence detecting circuit

Publications (2)

Publication Number Publication Date
JPS60117918A true JPS60117918A (en) 1985-06-25
JPH0416968B2 JPH0416968B2 (en) 1992-03-25

Family

ID=16812217

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22434083A Granted JPS60117918A (en) 1983-11-30 1983-11-30 Coincidence detecting circuit

Country Status (1)

Country Link
JP (1) JPS60117918A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0964724A (en) * 1995-08-21 1997-03-07 Fujitsu Ltd Nor logic circuit
JPH10144098A (en) * 1996-11-11 1998-05-29 Oki Electric Ind Co Ltd Semiconductor integrated circuit
JP2018074403A (en) * 2016-10-31 2018-05-10 株式会社デンソーウェーブ Remote controller

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5333026A (en) * 1976-09-09 1978-03-28 Toshiba Corp Coincidence detection circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5333026A (en) * 1976-09-09 1978-03-28 Toshiba Corp Coincidence detection circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0964724A (en) * 1995-08-21 1997-03-07 Fujitsu Ltd Nor logic circuit
JPH10144098A (en) * 1996-11-11 1998-05-29 Oki Electric Ind Co Ltd Semiconductor integrated circuit
JP2018074403A (en) * 2016-10-31 2018-05-10 株式会社デンソーウェーブ Remote controller

Also Published As

Publication number Publication date
JPH0416968B2 (en) 1992-03-25

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