JPS574578A - Microprocessor for electronic watch - Google Patents

Microprocessor for electronic watch

Info

Publication number
JPS574578A
JPS574578A JP7927880A JP7927880A JPS574578A JP S574578 A JPS574578 A JP S574578A JP 7927880 A JP7927880 A JP 7927880A JP 7927880 A JP7927880 A JP 7927880A JP S574578 A JPS574578 A JP S574578A
Authority
JP
Japan
Prior art keywords
address
subroutine
instruction
circuit elements
microprocessor
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
JP7927880A
Other languages
Japanese (ja)
Other versions
JPS6239909B2 (en
Inventor
Yoichi Wakai
Masuo Kitano
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
SHIMAUCHI SEIKI KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
SHIMAUCHI SEIKI 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, SHIMAUCHI SEIKI KK filed Critical Seiko Epson Corp
Priority to JP7927880A priority Critical patent/JPS574578A/en
Publication of JPS574578A publication Critical patent/JPS574578A/en
Publication of JPS6239909B2 publication Critical patent/JPS6239909B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G04G99/006—Electronic time-pieces using a microcomputer, e.g. for multi-function clocks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE:To call a subroutine by a fewer number of circuit elements, by executing the instruction in the next address when the subroutine is returned. CONSTITUTION:Symbols a and a+1 are the addresses in a main routine and b and b+1 are the address in the subroutine. When the subroutine is to be executed and a program counter reaches the address a, a call instruction is outputted from a program memory, moved from the address a to the address b, then moved to the address b+x. If the return instruction is written in the address b+x in this case, it is returned to the address a at the time of return, and the instruction in the next address a+1 is executed. In this control method, address can be omitted and the number of circuit elements can be decreased to a large extent. Thus, the subroutine can be called with the fewer number of circuit elements.
JP7927880A 1980-06-12 1980-06-12 Microprocessor for electronic watch Granted JPS574578A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7927880A JPS574578A (en) 1980-06-12 1980-06-12 Microprocessor for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7927880A JPS574578A (en) 1980-06-12 1980-06-12 Microprocessor for electronic watch

Publications (2)

Publication Number Publication Date
JPS574578A true JPS574578A (en) 1982-01-11
JPS6239909B2 JPS6239909B2 (en) 1987-08-25

Family

ID=13685394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7927880A Granted JPS574578A (en) 1980-06-12 1980-06-12 Microprocessor for electronic watch

Country Status (1)

Country Link
JP (1) JPS574578A (en)

Also Published As

Publication number Publication date
JPS6239909B2 (en) 1987-08-25

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