JPS5771049A - One-chip microcomputer - Google Patents

One-chip microcomputer

Info

Publication number
JPS5771049A
JPS5771049A JP55146510A JP14651080A JPS5771049A JP S5771049 A JPS5771049 A JP S5771049A JP 55146510 A JP55146510 A JP 55146510A JP 14651080 A JP14651080 A JP 14651080A JP S5771049 A JPS5771049 A JP S5771049A
Authority
JP
Japan
Prior art keywords
program
address value
starting address
rom3
incorporated
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
JP55146510A
Other languages
Japanese (ja)
Other versions
JPH0155497B2 (en
Inventor
Kimihisa Sasazaki
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP55146510A priority Critical patent/JPS5771049A/en
Publication of JPS5771049A publication Critical patent/JPS5771049A/en
Publication of JPH0155497B2 publication Critical patent/JPH0155497B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/445—Program loading or initiating

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Microcomputers (AREA)

Abstract

PURPOSE:To reduce the development cost of a software by setting a program starting value and an interrupt-program starting address value in both an incorporated and an external program memory. CONSTITUTION:When the switch 28 of a modification-control-signal generating means 6 is closed, the starting address value 1a of a program stored in an incorporated ROM3 and the starting address value 2a of an interrupt program are sent to a program counter 8. With the switch 28 open, a program starting address value 1b and an interrupt program starting address value 2b set in an external program memory 4 are transferred to the program counter 8. The incorporated ROM3 is selected according to the address value of the program counter 8 and the values are set in the incorporated ROM3 or an external memory 4. Therefore, the program in the corporated ROM3 is executed regardless of the program starting address value and interrupt program starting address value.
JP55146510A 1980-10-20 1980-10-20 One-chip microcomputer Granted JPS5771049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55146510A JPS5771049A (en) 1980-10-20 1980-10-20 One-chip microcomputer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55146510A JPS5771049A (en) 1980-10-20 1980-10-20 One-chip microcomputer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP63324565A Division JPH0256025A (en) 1988-12-22 1988-12-22 One chip microcomputer

Publications (2)

Publication Number Publication Date
JPS5771049A true JPS5771049A (en) 1982-05-01
JPH0155497B2 JPH0155497B2 (en) 1989-11-24

Family

ID=15409257

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55146510A Granted JPS5771049A (en) 1980-10-20 1980-10-20 One-chip microcomputer

Country Status (1)

Country Link
JP (1) JPS5771049A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965356A (en) * 1982-10-05 1984-04-13 Nec Corp Single-chip microcomputer
JPS59167763A (en) * 1983-03-01 1984-09-21 エスジーエス―トムソン　マイクロエレクトロニクス，インコーポレイテッド Microcomputer
JPS59168556A (en) * 1983-03-01 1984-09-22 エスジーエス―トムソン　マイクロエレクトロニクス，インコーポレイテッド Ic microprocessor
JPS59216263A (en) * 1983-05-24 1984-12-06 Matsushita Electric Ind Co Ltd External rom extension controlling circuit of microcomputer
JPH02168320A (en) * 1988-12-21 1990-06-28 Mitsubishi Electric Corp Microprocessor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194731A (en) * 1975-02-18 1976-08-19

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194731A (en) * 1975-02-18 1976-08-19

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965356A (en) * 1982-10-05 1984-04-13 Nec Corp Single-chip microcomputer
JPS59167763A (en) * 1983-03-01 1984-09-21 エスジーエス―トムソン　マイクロエレクトロニクス，インコーポレイテッド Microcomputer
JPS59168556A (en) * 1983-03-01 1984-09-22 エスジーエス―トムソン　マイクロエレクトロニクス，インコーポレイテッド Ic microprocessor
JPS59216263A (en) * 1983-05-24 1984-12-06 Matsushita Electric Ind Co Ltd External rom extension controlling circuit of microcomputer
JPH02168320A (en) * 1988-12-21 1990-06-28 Mitsubishi Electric Corp Microprocessor

Also Published As

Publication number Publication date
JPH0155497B2 (en) 1989-11-24

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