JPS5785132A - Digital input circuit - Google Patents

Digital input circuit

Info

Publication number
JPS5785132A
JPS5785132A JP55162144A JP16214480A JPS5785132A JP S5785132 A JPS5785132 A JP S5785132A JP 55162144 A JP55162144 A JP 55162144A JP 16214480 A JP16214480 A JP 16214480A JP S5785132 A JPS5785132 A JP S5785132A
Authority
JP
Japan
Prior art keywords
signal
circuit
counter
memory
signal input
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
JP55162144A
Other languages
Japanese (ja)
Inventor
Naoki Yoshinari
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.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing Co 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 Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Priority to JP55162144A priority Critical patent/JPS5785132A/en
Publication of JPS5785132A publication Critical patent/JPS5785132A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
    • G06F1/14—Time supervision arrangements, e.g. real time clock

Abstract

PURPOSE:To realize a small-sized counter, by using a pair of bus signals as a signal input line and handling plural signals with a sheet of module card. CONSTITUTION:A transmitting circuit of an input module card usually outputs a clock pulse train to a signal input bus 101. A synchronism detecting circuit of a signal input interface S1 detects the synchronous pulse out of the above-mentioned pulse train to deliver a sampling signal SP to a photocoupler PC2 as well as to a counter 12 and a memory 15. When the coupler PC2 received the signal SP is turned on, a signal input photocoupler PC1 conducts. Then the coupler PC1 works when an input contact K1 is closed, and 1 is stored in a memory circuit 15 synchronously with the signal SP. When the contact K1 is open, 0 is stored in the circuit 15. On the other hand, a counter 12 counts the clock pulses supplied from a receiver 9 and delivers a signal to a driver 8 when the count value of the pulses reaches a prescribed value. Then the signal in the memory 15 is delivered.
JP55162144A 1980-11-18 1980-11-18 Digital input circuit Pending JPS5785132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55162144A JPS5785132A (en) 1980-11-18 1980-11-18 Digital input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55162144A JPS5785132A (en) 1980-11-18 1980-11-18 Digital input circuit

Publications (1)

Publication Number Publication Date
JPS5785132A true JPS5785132A (en) 1982-05-27

Family

ID=15748867

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55162144A Pending JPS5785132A (en) 1980-11-18 1980-11-18 Digital input circuit

Country Status (1)

Country Link
JP (1) JPS5785132A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61275923A (en) * 1985-01-30 1986-12-06 ワイズ・テクノロジ− Computer system containing terminal and keyboard

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033383A (en) * 1973-07-28 1975-03-31
JPS52129348A (en) * 1976-04-23 1977-10-29 Sanyo Electric Co Ltd Cashless service unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5033383A (en) * 1973-07-28 1975-03-31
JPS52129348A (en) * 1976-04-23 1977-10-29 Sanyo Electric Co Ltd Cashless service unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61275923A (en) * 1985-01-30 1986-12-06 ワイズ・テクノロジ− Computer system containing terminal and keyboard

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