JPS57167196A - Memory circuit - Google Patents

Memory circuit

Info

Publication number
JPS57167196A
JPS57167196A JP56051411A JP5141181A JPS57167196A JP S57167196 A JPS57167196 A JP S57167196A JP 56051411 A JP56051411 A JP 56051411A JP 5141181 A JP5141181 A JP 5141181A JP S57167196 A JPS57167196 A JP S57167196A
Authority
JP
Japan
Prior art keywords
voltage
signal
power supply
circuit
selection state
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
JP56051411A
Other languages
Japanese (ja)
Other versions
JPS6160514B2 (en
Inventor
Yasuo Akatsuka
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 JP56051411A priority Critical patent/JPS57167196A/en
Publication of JPS57167196A publication Critical patent/JPS57167196A/en
Publication of JPS6160514B2 publication Critical patent/JPS6160514B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management 

Abstract

PURPOSE:To obtain an IC memory for low voltage, by using a means that shifts to a non-selection state after detecting that the power supply is less than a prescribed level higher than the minimum value of the data holding voltage. CONSTITUTION:A power supply voltage detecting circuit 7 is set within a control circuit part 6, and each block excepting the part 6 is controlled by the internal control signals CS' and W'. The signal CS' is set at a low level when the chip selection signal, i.e., an external control signal is set at a high level. Thus a non- selection state is secured. In other words, when the voltage is dropped, the circuit 7 detects it and produces the detection signal R to set the signals CS' at a low level through an NUR301.
JP56051411A 1981-04-06 1981-04-06 Memory circuit Granted JPS57167196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56051411A JPS57167196A (en) 1981-04-06 1981-04-06 Memory circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56051411A JPS57167196A (en) 1981-04-06 1981-04-06 Memory circuit

Publications (2)

Publication Number Publication Date
JPS57167196A true JPS57167196A (en) 1982-10-14
JPS6160514B2 JPS6160514B2 (en) 1986-12-20

Family

ID=12886184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56051411A Granted JPS57167196A (en) 1981-04-06 1981-04-06 Memory circuit

Country Status (1)

Country Link
JP (1) JPS57167196A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59117776A (en) * 1982-12-24 1984-07-07 Hitachi Micro Comput Eng Ltd Semiconductor storage device
US4553225A (en) * 1981-09-26 1985-11-12 Fujitsu Limited Method of testing IC memories

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4553225A (en) * 1981-09-26 1985-11-12 Fujitsu Limited Method of testing IC memories
JPS59117776A (en) * 1982-12-24 1984-07-07 Hitachi Micro Comput Eng Ltd Semiconductor storage device

Also Published As

Publication number Publication date
JPS6160514B2 (en) 1986-12-20

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