BM29F400T-12TI データシートの表示（PDF） - Unspecified

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BM29F400T-12TI

4MEGABIT (512K x 8/ 256K x 16) 5VOLT SECTOR ERASE CMOS FLASH MEMORY

Unspecified 

BRIGHT

Microelectronics

Inc.

Preliminary BM29F400T/BM29F400B

Sector Unprotect

The BM29F400 also features a sector unprotect mode, so that protected sectors may be unprotected

to incorporate any changes in the code. Protecting all sectors is necessary before unprotecting any

sector(s). Sector unprotection is accomplished in a PROM programmer.

START

Write Program Command Sequence

(see below)

/Data Polling Device

Increment Address

NO

Last Address

?

YES

Programming Completed

Program Command Sequence (Address/Command)

5555H/AAH

2AAAH/55H

5555H/A0H

Program Address/ Program Data

Figure 1. Internal Programming Algorithm

A Winbond Company

- 17 -

Publication Release Date: May 1999

Revision A1

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