JPS6446865A - Microprocessor - Google Patents

Microprocessor

Info

Publication number
JPS6446865A
JPS6446865A JP62204712A JP20471287A JPS6446865A JP S6446865 A JPS6446865 A JP S6446865A JP 62204712 A JP62204712 A JP 62204712A JP 20471287 A JP20471287 A JP 20471287A JP S6446865 A JPS6446865 A JP S6446865A
Authority
JP
Japan
Prior art keywords
wait
programmable
microprocessor
signal
devices
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
JP62204712A
Other languages
Japanese (ja)
Inventor
Seiji Arai
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP62204712A priority Critical patent/JPS6446865A/en
Publication of JPS6446865A publication Critical patent/JPS6446865A/en
Pending legal-status Critical Current

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  • Microcomputers (AREA)

Abstract

PURPOSE:To enable a programmable wait function to apply other I/O devices without adding hardware to other I/O devices, by using a wait display circuit. CONSTITUTION:A microprocessor wait terminal 4 is provided together with an external wait input buffer 2, an OR gate 1 which secures an OR between a programmable wait signal A and an external wait signal, and a transfer gate 3 which outputs the programmable wait signal to outside. A pull-up resistance 5 and an external wait buffer 6 are connected to the terminal 4. A coprocessor contains a coprocessor wait terminal 7 and an input buffer 8. In such a constitution, a wait display circuit outputs a ready signal to the outside of a microprocessor during the bus wait time set by a program. Thus it is possible to apply the programmable wait function of the microprocessor without adding any hardware like a register, etc., to other I/O devices (coprocessors).
JP62204712A 1987-08-17 1987-08-17 Microprocessor Pending JPS6446865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62204712A JPS6446865A (en) 1987-08-17 1987-08-17 Microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62204712A JPS6446865A (en) 1987-08-17 1987-08-17 Microprocessor

Publications (1)

Publication Number Publication Date
JPS6446865A true JPS6446865A (en) 1989-02-21

Family

ID=16495059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62204712A Pending JPS6446865A (en) 1987-08-17 1987-08-17 Microprocessor

Country Status (1)

Country Link
JP (1) JPS6446865A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419451A (en) * 1987-07-15 1989-01-23 Hitachi Ltd Microprocessor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6419451A (en) * 1987-07-15 1989-01-23 Hitachi Ltd Microprocessor

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