JPS5753892A - Prom protecting circuit for misinsertion of prom writer - Google Patents

Prom protecting circuit for misinsertion of prom writer

Info

Publication number
JPS5753892A
JPS5753892A JP12695680A JP12695680A JPS5753892A JP S5753892 A JPS5753892 A JP S5753892A JP 12695680 A JP12695680 A JP 12695680A JP 12695680 A JP12695680 A JP 12695680A JP S5753892 A JPS5753892 A JP S5753892A
Authority
JP
Japan
Prior art keywords
prom
prom6
voltage
resistance
socket
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
JP12695680A
Other languages
Japanese (ja)
Other versions
JPS599120B2 (en
Inventor
Sakuyuki Mizuno
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55126956A priority Critical patent/JPS599120B2/en
Publication of JPS5753892A publication Critical patent/JPS5753892A/en
Publication of JPS599120B2 publication Critical patent/JPS599120B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C17/00—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards
    • G11C17/14—Read-only memories programmable only once; Semi-permanent stores, e.g. manually-replaceable information cards in which contents are determined by selectively establishing, breaking or modifying connecting links by permanently altering the state of coupling elements, e.g. PROM
    • G11C17/18—Auxiliary circuits, e.g. for writing into memory

Abstract

PURPOSE:To facilitate an easy write-in/readout action to PROM and at the same time to prevent the breakdown due to a misinsertion of the PROM, by controlling the voltage to be supplied to the PROM and detecting the normal or abnormal insertion of the PROM into a socket through a comparator. CONSTITUTION:Transistors (TR) 3 and 2 are turned off since a voltage application signal 32 is set at OV excepting the write-in/readout mode. Then the voltage divided by a high resistance 1 and an internal resistance 7 of a PROM6 connected forward to a socket 4 is supplied to the PROM6. While the voltage passing through the resistance 1 is higher than the reference voltage, and the output of a comparator 5 is set at a low level. If the PROM6 is inserted backward into the socket 4, the resistance 7 is reduced. As a result, the output of the comparator 5 is inverted to a high level to produce an alarm through a buzzer 10, etc. In this case, both the voltage and current to be supplied to the PROM6 are controlled by the resistance 1 to prevent the destruction of the PROM6. Thus the write-in/readout to a PROM can be done in an easy and accurate way witout paying any excessive attention to the insertion of the PROM into a socket. At the same time, the breakdown of the PROM due to a misinsertion can be previously prevented.
JP55126956A 1980-09-12 1980-09-12 PROM protection circuit due to incorrect programming of PROM writer Expired JPS599120B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55126956A JPS599120B2 (en) 1980-09-12 1980-09-12 PROM protection circuit due to incorrect programming of PROM writer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55126956A JPS599120B2 (en) 1980-09-12 1980-09-12 PROM protection circuit due to incorrect programming of PROM writer

Publications (2)

Publication Number Publication Date
JPS5753892A true JPS5753892A (en) 1982-03-31
JPS599120B2 JPS599120B2 (en) 1984-02-29

Family

ID=14948050

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55126956A Expired JPS599120B2 (en) 1980-09-12 1980-09-12 PROM protection circuit due to incorrect programming of PROM writer

Country Status (1)

Country Link
JP (1) JPS599120B2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013399A (en) * 1983-07-04 1985-01-23 Fanuc Ltd Operating method of power supply for rom
DE3444306A1 (en) * 1983-12-05 1985-06-13 Shin-Etsu Chemical Co., Ltd., Tokio/Tokyo BORSILICIUM ORGANIC POLYMER AND PRODUCTION METHOD THEREFOR
JPH01264695A (en) * 1989-02-09 1989-10-20 Toshiba Corp Prom protecting circuit by misinsertion of prom writer
US5508363A (en) * 1987-01-28 1996-04-16 Mitsui Toatsu Chemicals, Incorporated Preparation process of organosilicon compounds and production of silicon carbide
US5596117A (en) * 1987-01-28 1997-01-21 Mitsui Toatsu Chemicals, Incorporated Preparation process of organo silicon compounds and production process of silicon
US5620934A (en) * 1987-01-28 1997-04-15 Mitsui Toatsu Chemicals, Incorporated Production process of silicon carbide from organosilicon compounds

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013399A (en) * 1983-07-04 1985-01-23 Fanuc Ltd Operating method of power supply for rom
DE3444306A1 (en) * 1983-12-05 1985-06-13 Shin-Etsu Chemical Co., Ltd., Tokio/Tokyo BORSILICIUM ORGANIC POLYMER AND PRODUCTION METHOD THEREFOR
US5508363A (en) * 1987-01-28 1996-04-16 Mitsui Toatsu Chemicals, Incorporated Preparation process of organosilicon compounds and production of silicon carbide
US5596117A (en) * 1987-01-28 1997-01-21 Mitsui Toatsu Chemicals, Incorporated Preparation process of organo silicon compounds and production process of silicon
US5620934A (en) * 1987-01-28 1997-04-15 Mitsui Toatsu Chemicals, Incorporated Production process of silicon carbide from organosilicon compounds
JPH01264695A (en) * 1989-02-09 1989-10-20 Toshiba Corp Prom protecting circuit by misinsertion of prom writer

Also Published As

Publication number Publication date
JPS599120B2 (en) 1984-02-29

Similar Documents

Publication Publication Date Title
JPS57124946A (en) Pulse detection circuit
EP0158512A3 (en) Reset circuit
JPS5753892A (en) Prom protecting circuit for misinsertion of prom writer
JPS5764398A (en) Memory device
JPS56117409A (en) Amplifying device
JPS5713238A (en) Back-up system of control computer for efi engine
JPS5717226A (en) Integrated circuit
JPS6437798A (en) Current detecting circuit for rom device
ATE29634T1 (en) CIRCUIT ARRANGEMENT FOR POTENTIAL-FREE DETECTION OF BINARY ELECTRICAL SIGNALS.
JPS647719A (en) Transmitting power control circuit
JPS57167196A (en) Memory circuit
JPS6435800A (en) Non-volatile semiconductor storage device
JPS55163479A (en) Electronic clock circuit
JPS5614301A (en) Engine control unit
JPS55115728A (en) Level clamp circuit
JPS55138648A (en) Ionization type smoke detector
JPS54116277A (en) Abnormal voltage detecting circuit
JPS5653426A (en) Temperature measuring apparatus
SU1552357A1 (en) Monostable multivibrator
JPS5449197A (en) Ion type smoke sensor
JPS57192111A (en) Protecting circuit
JPS6482391A (en) Prom writing device
JPS647398A (en) Prom integrated circuit
JPS6451819A (en) Malfunction preventing circuit
JPS5779457A (en) Voltage comparing circuit