JPH03201175A - Control device for terminal potential - Google Patents

Control device for terminal potential

Info

Publication number
JPH03201175A
JPH03201175A JP1342627A JP34262789A JPH03201175A JP H03201175 A JPH03201175 A JP H03201175A JP 1342627 A JP1342627 A JP 1342627A JP 34262789 A JP34262789 A JP 34262789A JP H03201175 A JPH03201175 A JP H03201175A
Authority
JP
Japan
Prior art keywords
pull
trs
resistor
rewritable rom
connection
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
JP1342627A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Tanaka
Rie Ariga
Nobuyuki Ikeda
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1342627A priority Critical patent/JPH03201175A/en
Publication of JPH03201175A publication Critical patent/JPH03201175A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the cost of the control device by executing switching for changing the connection state of each resistor means connected between a potential control terminal and a power supply terminal, or an earth terminal by information stored in a rewritable ROM.
CONSTITUTION: The information for specifying the connection/disconnection of pull-up and pull-down resistors is stored in a part of the rewritable ROM 1 and signal lines for transferring outputs corresponding to the information are connected to the gate terminals of respective pull-up resistor transistors(TRs) 2 and pull-down resistor TRs 3. These TRs use on-state channel resistors as resistor means. The ON/OFF of respective TRs is determined by an output from the rewritable ROM 1 and the connection/disconnection of the pull-up and pull-down resistors of respective input terminals 4 is determined in accordance with the ON/OFF of the TRs. Consequently, the cost can be reduced.
COPYRIGHT: (C)1991,JPO&Japio
JP1342627A 1989-12-28 1989-12-28 Control device for terminal potential Pending JPH03201175A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1342627A JPH03201175A (en) 1989-12-28 1989-12-28 Control device for terminal potential

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1342627A JPH03201175A (en) 1989-12-28 1989-12-28 Control device for terminal potential

Publications (1)

Publication Number Publication Date
JPH03201175A true JPH03201175A (en) 1991-09-03

Family

ID=18355239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1342627A Pending JPH03201175A (en) 1989-12-28 1989-12-28 Control device for terminal potential

Country Status (1)

Country Link
JP (1) JPH03201175A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09246939A (en) * 1996-03-04 1997-09-19 Mitsubishi Electric Corp Semiconductor circuit
US6076119A (en) * 1997-09-29 2000-06-13 Mitsubishi Electric System Lsi Design Corporation Operation mode transfer system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190635A (en) * 1985-02-19 1986-08-25 Sanyo Electric Co Ltd Microcomputer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61190635A (en) * 1985-02-19 1986-08-25 Sanyo Electric Co Ltd Microcomputer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09246939A (en) * 1996-03-04 1997-09-19 Mitsubishi Electric Corp Semiconductor circuit
US6076119A (en) * 1997-09-29 2000-06-13 Mitsubishi Electric System Lsi Design Corporation Operation mode transfer system and method

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