HN58C256AT-85 Просмотр технического описания (PDF) - Hitachi -> Renesas Electronics

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HN58C256AT-85

256k EEPROM (32-kword × 8-bit) Ready/Busy and RES function (HN58C257A)

Hitachi -> Renesas Electronics 

HN58C256A Series, HN58C257A Series

(2) Protection by RES (only the HN58C257A series)

The unprogrammable state can be realized by that the CPU’s reset signal inputs directly to the EEPROM’s

RES pin. RES should be kept VSS level during VCC on/off.

The EEPROM breaks off programming operation when RES becomes low, programming operation doesn’t

finish correctly in case that RES falls low during programming operation. RES should be kept high for 10 ms

after the last data input.

VCC

RES

WE

or CE

Program inhibit

1 µs min 100 µs min

Program inhibit

10 ms min

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