JPS62200414A - Hand-held computer - Google Patents

Hand-held computer

Info

Publication number
JPS62200414A
JPS62200414A JP61043116A JP4311686A JPS62200414A JP S62200414 A JPS62200414 A JP S62200414A JP 61043116 A JP61043116 A JP 61043116A JP 4311686 A JP4311686 A JP 4311686A JP S62200414 A JPS62200414 A JP S62200414A
Authority
JP
Japan
Prior art keywords
clock
signal
microprocessor
circuit
outputs
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
JP61043116A
Inventor
Takashi Tokura
Original Assignee
Nec Corp
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 filed Critical Nec Corp
Priority to JP61043116A priority Critical patent/JPS62200414A/en
Publication of JPS62200414A publication Critical patent/JPS62200414A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To curtail the power consumption and to extend a battery life by generating plural clocks so that a main clock of a microprocessor can be selected from among these plural clocks by the user and as a software.
CONSTITUTION: When a battery circuit is turned on, a power-on resetting circuit is operated and outputs of ports P0, P1 of a parallel input/output port 5 become both '0'. In this case, a control signal selecting circuit 4 selects an input signal '0' of an input terminal D0 and output it as a clock selecting signal 8 from an output terminal Q, a clock selecting circuit 2 selects a clock 9 and outputs it to a microprocessor 1, and the microprocessor 1 executes its initial operation. Thereafter, a control signal 11 becomes a high level and the control signal selecting circuit 4 outputs an input signal of an input terminal D1, namely a signal corresponding to a state of a manual switch 7, as the clock selecting signal 8. As a result, to the microprocessor 1, the clock 9 or 10 which has been selected by a user is outputted from the clock selecting circuit 2, as a main clock.
COPYRIGHT: (C)1987,JPO&Japio
JP61043116A 1986-02-27 1986-02-27 Hand-held computer Pending JPS62200414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61043116A JPS62200414A (en) 1986-02-27 1986-02-27 Hand-held computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61043116A JPS62200414A (en) 1986-02-27 1986-02-27 Hand-held computer

Publications (1)

Publication Number Publication Date
JPS62200414A true JPS62200414A (en) 1987-09-04

Family

ID=12654865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61043116A Pending JPS62200414A (en) 1986-02-27 1986-02-27 Hand-held computer

Country Status (1)

Country Link
JP (1) JPS62200414A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6535985B1 (en) 1990-03-23 2003-03-18 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6782483B2 (en) 1990-03-23 2004-08-24 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
JP2007084216A (en) * 2005-09-21 2007-04-05 Toshiba Elevator Co Ltd Control device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121434A (en) * 1982-01-13 1983-07-19 Toshiba Corp Clock pulse control circuit
JPS60108926A (en) * 1983-11-18 1985-06-14 Nippon Telegr & Teleph Corp <Ntt> Generating system of clock pulse

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58121434A (en) * 1982-01-13 1983-07-19 Toshiba Corp Clock pulse control circuit
JPS60108926A (en) * 1983-11-18 1985-06-14 Nippon Telegr & Teleph Corp <Ntt> Generating system of clock pulse

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6535985B1 (en) 1990-03-23 2003-03-18 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6782483B2 (en) 1990-03-23 2004-08-24 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6792552B2 (en) 1990-03-23 2004-09-14 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6795929B2 (en) 1990-03-23 2004-09-21 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6804791B2 (en) 1990-03-23 2004-10-12 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6839855B2 (en) 1990-03-23 2005-01-04 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6882389B2 (en) 1990-03-23 2005-04-19 Matsushita Electric Industrial Co., Ltd. Transflective LCD device with different transmission parts each having a particular transmittance
US6909483B2 (en) 1990-03-23 2005-06-21 Matsushita Electric Industrial Co., Ltd. Transflective LCD device with different transmission parts each having a particular transmittance
US6941481B2 (en) 1990-03-23 2005-09-06 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6952787B2 (en) 1990-03-23 2005-10-04 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6952248B2 (en) 1990-03-23 2005-10-04 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6971037B2 (en) 1990-03-23 2005-11-29 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US6990595B2 (en) 1990-03-23 2006-01-24 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7006181B2 (en) 1990-03-23 2006-02-28 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7024572B2 (en) 1990-03-23 2006-04-04 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7062667B2 (en) 1990-03-23 2006-06-13 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7073084B2 (en) 1990-03-23 2006-07-04 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7079108B2 (en) 1990-03-23 2006-07-18 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7080272B2 (en) 1990-03-23 2006-07-18 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7120809B2 (en) 1990-03-23 2006-10-10 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7548235B2 (en) 1990-03-23 2009-06-16 Panasonic Corporation Data processing apparatus
US7213162B2 (en) 1990-03-23 2007-05-01 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7432921B2 (en) 1990-03-23 2008-10-07 Matsushita Electric Industrial Co., Ltd. Data processing apparatus
US7464281B2 (en) 1990-03-23 2008-12-09 Panasonic Corporation Data processing apparatus
US7821489B2 (en) 1990-03-23 2010-10-26 Panasonic Corporation Data processing apparatus
JP2007084216A (en) * 2005-09-21 2007-04-05 Toshiba Elevator Co Ltd Control device

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