HN27C256HG Ver la hoja de datos (PDF) - Hitachi -> Renesas Electronics

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HN27C256HG

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

Hitachi -> Renesas Electronics 

HN27C256HG Series

Fast High-Reliability Programming

This device can be applied the Fast High-Reliability Programming Algorithm shown in following flowchart.

This algorithm offers both faster programming time and high reliability data retension. A theoretical

programming time (except brank checking and verifying time) is one-tenth of conventional high performance

programming algorithm’s. Regarding the model and software version of the programmers available this

algorithm, please contact programmer maker.

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 = 0.2 ms ± 5%

VERIFY

NOGO

GO

Program tOPW = 0.2n ms

NO

LAST

Address?

YES

SET READ MODE

VCC = 5.0 V ± 0.5 V, VPP = VCC

READ

All Address

GO

END

NOGO

NO

n = 25

YES

FAIL

7

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