JPS55123740A - Information processing unit - Google Patents

Information processing unit

Info

Publication number
JPS55123740A
JPS55123740A JP3050679A JP3050679A JPS55123740A JP S55123740 A JPS55123740 A JP S55123740A JP 3050679 A JP3050679 A JP 3050679A JP 3050679 A JP3050679 A JP 3050679A JP S55123740 A JPS55123740 A JP S55123740A
Authority
JP
Japan
Prior art keywords
interrupt
signal
detector
change
high level
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
JP3050679A
Other languages
Japanese (ja)
Inventor
Kazuhide Kawada
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
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3050679A priority Critical patent/JPS55123740A/en
Publication of JPS55123740A publication Critical patent/JPS55123740A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to perform a complicated interrupt control accurately with a simple circuit constitution, by detecting the change from a high level to a low level or the change from the low level to the high level for the signal of an interrupt signal input terminal to perform the interrupt control.
CONSTITUTION: Rise signal detector 2 and fall signal detector 3 are connected in parallel to terminal 1 where the interrupt signal is inputted. The change from a low level to a high level of the input signal is detected by detector 2, and by the output of detector 2, rise interrupt address generating circuit 4 writes the interrupt address to program counter 6, and CPU9 executes the instruction, which is written at the interrupt address, dependently upon this address designation. Meanwhile, the change from the high level to the low level of the input signal executes the instruction, which is written at the interrupt address, through detector 3, fall interrupt address generating circuit 5 and counter 6 similarly. As a result, a complicated interrupt control can be performed accurately with a simple circuit constitution.
COPYRIGHT: (C)1980,JPO&Japio
JP3050679A 1979-03-15 1979-03-15 Information processing unit Pending JPS55123740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3050679A JPS55123740A (en) 1979-03-15 1979-03-15 Information processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3050679A JPS55123740A (en) 1979-03-15 1979-03-15 Information processing unit

Publications (1)

Publication Number Publication Date
JPS55123740A true JPS55123740A (en) 1980-09-24

Family

ID=12305694

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3050679A Pending JPS55123740A (en) 1979-03-15 1979-03-15 Information processing unit

Country Status (1)

Country Link
JP (1) JPS55123740A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249142A (en) * 1985-04-27 1986-11-06 Sharp Corp Interruption circuit
JPH0193827A (en) * 1987-10-05 1989-04-12 Nec Corp Interrupting circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125946A (en) * 1974-08-27 1976-03-03 Kawasaki Heavy Ind Ltd
JPS52130252A (en) * 1976-04-24 1977-11-01 Meidensha Electric Mfg Co Ltd Digital control unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125946A (en) * 1974-08-27 1976-03-03 Kawasaki Heavy Ind Ltd
JPS52130252A (en) * 1976-04-24 1977-11-01 Meidensha Electric Mfg Co Ltd Digital control unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61249142A (en) * 1985-04-27 1986-11-06 Sharp Corp Interruption circuit
JPH0193827A (en) * 1987-10-05 1989-04-12 Nec Corp Interrupting circuit

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