JPS553043A - Microcomputer control circuit - Google Patents

Microcomputer control circuit

Info

Publication number
JPS553043A
JPS553043A JP7508678A JP7508678A JPS553043A JP S553043 A JPS553043 A JP S553043A JP 7508678 A JP7508678 A JP 7508678A JP 7508678 A JP7508678 A JP 7508678A JP S553043 A JPS553043 A JP S553043A
Authority
JP
Japan
Prior art keywords
order
circuit
acc9
alu8
kept
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
JP7508678A
Other languages
Japanese (ja)
Other versions
JPS5732818B2 (en
Inventor
Yoshiaki Daimatsu
Takashi Sakao
Toshiaki Suzuki
Kazuaki Mayumi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7508678A priority Critical patent/JPS553043A/en
Publication of JPS553043A publication Critical patent/JPS553043A/en
Publication of JPS5732818B2 publication Critical patent/JPS5732818B2/ja
Granted legal-status Critical Current

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  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE: To save the program memory by executing only the first order when the same order continues as well as accepting the interruption even at the order execution time.
CONSTITUTION: With the first load immediate (Li) order, the Li order is decoded through order decoder 4 and the lower 4 bits of order code A of IR3 are applied to ACC9 via bus 6 and ALU8. On the other hand, for store signal D of ACC9, Li order signal B becomes H with the Li order and the output of delay circuit 14 is kept at L. Accordingly, AND circuit 16 features H and the data of ALU8 supplied to ACC9 is kept to be stored as it is. Then with the Li order, the output of circuit 14 also becomes H with circuit 16 turned to L. Thus the storage of the data is inhibited for ACC9. If an interruption takes place at that moment, the signals of circuit 14 are also shunted to stack 5.
COPYRIGHT: (C)1980,JPO&Japio
JP7508678A 1978-06-20 1978-06-20 Microcomputer control circuit Granted JPS553043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7508678A JPS553043A (en) 1978-06-20 1978-06-20 Microcomputer control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7508678A JPS553043A (en) 1978-06-20 1978-06-20 Microcomputer control circuit

Publications (2)

Publication Number Publication Date
JPS553043A true JPS553043A (en) 1980-01-10
JPS5732818B2 JPS5732818B2 (en) 1982-07-13

Family

ID=13566005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7508678A Granted JPS553043A (en) 1978-06-20 1978-06-20 Microcomputer control circuit

Country Status (1)

Country Link
JP (1) JPS553043A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55105752A (en) * 1979-02-07 1980-08-13 Nec Corp Information processor
JPS5736348A (en) * 1980-08-14 1982-02-27 Toshiba Corp Branched controlling circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55105752A (en) * 1979-02-07 1980-08-13 Nec Corp Information processor
JPS6329293B2 (en) * 1979-02-07 1988-06-13 Nippon Electric Co
JPS5736348A (en) * 1980-08-14 1982-02-27 Toshiba Corp Branched controlling circuit
JPS6032207B2 (en) * 1980-08-14 1985-07-26 株式会社東芝 Branch control circuit

Also Published As

Publication number Publication date
JPS5732818B2 (en) 1982-07-13

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