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JPS5633725A - Connecting system for external unit - Google Patents

Connecting system for external unit

Info

Publication number
JPS5633725A
JPS5633725A JP10884879A JP10884879A JPS5633725A JP S5633725 A JPS5633725 A JP S5633725A JP 10884879 A JP10884879 A JP 10884879A JP 10884879 A JP10884879 A JP 10884879A JP S5633725 A JPS5633725 A JP S5633725A
Authority
JP
Japan
Prior art keywords
circuit
bus
unit
address
control unit
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
JP10884879A
Other languages
Japanese (ja)
Inventor
Yoshitaka Ito
Ikuo Tokizawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP10884879A priority Critical patent/JPS5633725A/en
Publication of JPS5633725A publication Critical patent/JPS5633725A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To facilitate an easy formation of the central control unit into LSI, by securing an interface in terms of the hardware with connection of the external control unit and even trough the input and output interfaces are limited to three buses.
CONSTITUTION: When the central control unit 1 executes the instruction which means the contents of the data bus transmission/reception circuit 101, the address of the external control unit is supplied to the address bus transmission/reception circuit 102 via the address bus 3. And the command is supplied to the control part 103 via the control bus 4 to transmit the contents of the circuit 101. Here the address of the external control unit received at the circuit 102 is detected by the unit number collating circuit 116 to be indentical to the address of the self-unit. And thus the control part 103 transfers the data of the input circuit 111 to the circuit 101 via the AND circuit 106 and the OR circuit 108, and then transmits the contents onto the data bus 2. And at the same time, the transmission signal is sent to the control bus 4 to inform it to the unit 1. Receiving this information, the unit 1 stores the data on the bus 2 into the designated register to complete the working.
COPYRIGHT: (C)1981,JPO&Japio
JP10884879A 1979-08-27 1979-08-27 Connecting system for external unit Pending JPS5633725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10884879A JPS5633725A (en) 1979-08-27 1979-08-27 Connecting system for external unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10884879A JPS5633725A (en) 1979-08-27 1979-08-27 Connecting system for external unit

Publications (1)

Publication Number Publication Date
JPS5633725A true JPS5633725A (en) 1981-04-04

Family

ID=14495111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10884879A Pending JPS5633725A (en) 1979-08-27 1979-08-27 Connecting system for external unit

Country Status (1)

Country Link
JP (1) JPS5633725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125919U (en) * 1986-01-30 1987-08-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62125919U (en) * 1986-01-30 1987-08-10
JPH0417880Y2 (en) * 1986-01-30 1992-04-21

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