HN58V65API-10E datasheet(21/28 Pages) RENESAS

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HN58V65API-10E Fiches technique(PDF) 21 Page - Renesas Technology Corp

No de pièce	HN58V65API-10E

Description	64k EEPROM (8-kword x 8-bit) Ready/Busy function, RES function (HN58V66A) Wide Temperature Range version

PDF	28 Pages

Scroll/Zoom	100%

Fabricant	RENESAS [Renesas Technology Corp]

Site Internet	http://www.renesas.com

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21 / 28 page

HN58V65AI/HN58V66AI/HN58V65A-SR/HN58V66A-SR Series

Rev.3.00, Feb.02.2004, page 21 of 26

2. Data protection at VCC on/off

When VCC is turned on or off, noise on the control pins generated by external circuits (CPU, etc) may

act as a trigger and turn the EEPROM to program mode by mistake. To prevent this unintentional

programming, the EEPROM must be kept in an unprogrammable state while the CPU is in an unstable

state.

Note:

The EEPROM should be kept in unprogrammable state during VCC on/off by using CPU RESET

signal.

VCC

CPU

RESET

Unprogrammable

2.1 Protection by

CE, OE, WE

To realize the unprogrammable state, the input level of control pins must be held as shown in the

table below.

VCC

VSS

VCC

×: Don’t care.

VCC: Pull-up to VCC level.

VSS: Pull-down to VSS level.

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