BM29F040 Ver la hoja de datos (PDF) - Fujitsu

Número de pieza

componentes Descripción

Fabricante

BM29F040

FLASH MEMORY CMOS 4M (512K ×8) BIT

Fujitsu 

MBM29F040C-55/-70/-90

Increment PLSCNT

Start

Setup Sector Addr.

(A18, A17, A16)

PLSCNT = 1

OE = VID, A9 = VID, CE = VIL

Activate WE Pulse

Time out 100 µs

WE = VIH, CE = OE = VIL

(A9 should remain VID)

No

PLSCNT = 25?

Yes

Remove VID from A9

Write Reset Command

Device Failed

Read from Sector

Addr. = SA, A0 = 0, A1 = 1, A6 = 0

No

Data = 01H?

Yes

Yes

Protect Another Sector ?

No

Remove VID from A9

Write Reset Command

Sector Protection

Completed

Figure 7 Sector Protection Algorithm

35

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