HN27C256HG View Datasheet(PDF) - Hitachi -> Renesas Electronics

Part Name

Description

Manufacturer

HN27C256HG

32768-word × 8-bit CMOS UV Erasable and Programmable ROM

Hitachi -> Renesas Electronics 

HN27C256HG Series

High Performance Programming

This device can be applied the high performance programming algorithm shown in following flowchart. This

algorithm is as same as our 256-kbit EPROM series, so existing programmers can be used with this device.

This algorithm allows to obtain faster programming time without any voltage stress to the device nor

deterioration in reliability of programmed data.

START

SET PROG./VERIFY MODE

VPP = 12.5 ± 0.5 V, VCC = 6.0 ± 0.25 V

Address = 0

n=0

Address + 1 Address

n+1 n

Program tPW = 1.0 ms ± 5%

VERIFY

NOGO

GO

Program tOPW = 3n ms

NO

LAST

Address?

YES

SET READ MODE

VCC = 5.0 V ± 0.5 V, VPP = VCC

NO

n = 25

YES

READ

All Address

GO

END

NOGO

FAIL

11

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