HN58V256A Datasheet, PDF(3/25 Page) Hitachi Semiconductor – 256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58V257A)

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HN58V256A Datasheet, PDF (3/25 Pages) Hitachi Semiconductor – 256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58V257A)

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HN58V256A Series, HN58V257A Series

Pin Description

Pin name

Function

A0 to A14

Address input

I/O0 to I/O7

Data input/output

Output enable

Chip enable

Write enable

VCC

VSS

RDY/Busy*1

RES*1

Power supply

Ground

Ready busy

Reset

No connection

Note: 1. This function is supported by only the HN58V257A series.

Block Diagram

Note: 1. This function is supported by only the HN58V257A series.

VCC

VSS

RES *1

A14

High voltage generator

Control logic and timing

Address

buffer and

latch

Y decoder

X decoder

I/O0 to I/O7

I/O buffer

and

input latch

Y gating

Memory array

Data latch

RDY/Busy *1

Rev.5.00, Nov. 17.2003, page 3 of 22

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