JPS55116158A - Electronic desk-top calculator - Google Patents

Electronic desk-top calculator

Info

Publication number
JPS55116158A
JPS55116158A JP2269979A JP2269979A JPS55116158A JP S55116158 A JPS55116158 A JP S55116158A JP 2269979 A JP2269979 A JP 2269979A JP 2269979 A JP2269979 A JP 2269979A JP S55116158 A JPS55116158 A JP S55116158A
Authority
JP
Japan
Prior art keywords
period
timing signal
counter
voltage
printer
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
JP2269979A
Other languages
Japanese (ja)
Inventor
Yukio Maehashi
Hiroshi Hikichi
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 JP2269979A priority Critical patent/JPS55116158A/en
Publication of JPS55116158A publication Critical patent/JPS55116158A/en
Pending legal-status Critical Current

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  • Calculators And Similar Devices (AREA)

Abstract

PURPOSE:To prevent an in-use battery from running down, by detecting the period of a print timing signal generated by a printer. CONSTITUTION:When a power voltage drops from a rated operating voltage down to the lowest operation voltage of a system, the pulse period of timing signal CP of printer 3-3 becomes longer and the period of output RS of an AND circuit setting the initial value of counter 3-5 also becomes longer. Therefore, counter 3-5 is counted out to output borrow signal BO, thereby counting out memory element 3-8. When the period of timing signal CP is less than that of the lowest voltage of system operation, counter 3-5 is initialized before sending borrow signal BO out. The above-mentioned operation is carried out at every time when timing signal CP is generated.
JP2269979A 1979-02-28 1979-02-28 Electronic desk-top calculator Pending JPS55116158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2269979A JPS55116158A (en) 1979-02-28 1979-02-28 Electronic desk-top calculator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2269979A JPS55116158A (en) 1979-02-28 1979-02-28 Electronic desk-top calculator

Publications (1)

Publication Number Publication Date
JPS55116158A true JPS55116158A (en) 1980-09-06

Family

ID=12090106

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2269979A Pending JPS55116158A (en) 1979-02-28 1979-02-28 Electronic desk-top calculator

Country Status (1)

Country Link
JP (1) JPS55116158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6227819A (en) * 1985-07-29 1987-02-05 Sharp Corp Electronic equipment with recording device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6227819A (en) * 1985-07-29 1987-02-05 Sharp Corp Electronic equipment with recording device
JPH0464088B2 (en) * 1985-07-29 1992-10-13 Sharp Kk

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