MBM29DL400BC-70 View Datasheet(PDF) - Fujitsu

Part Name

Description

MFG CO.

MBM29DL400BC-70

FLASH MEMORY CMOS 4M (512K × 8/256K × 16) BIT

Fujitsu 

MBM29DL400TC-55/-70/-90/-12/MBM29DL400BC-55/-70/-90/-12

FAST MODE ALGORITHM

Start

RESET = VID

Device is Operating in

Temporary Sector

Unprotection Mode

Wait to 4 µs

No

Extended Sector

Protection Entry?

Yes

To Setup Sector Protection

Write XXXH/60H

Increment PLSCNT

No

PLSCNT = 25?

Yes

Remove VID from RESET

Write Reset Command

Device Failed

PLSCNT = 1

To Sector Protection

Write SPA/60H

(A0 = VIL, A1 = VIH, A6 = VIL)

Time Out 150 µs

To Verify Sector Protection

Write SPA/40H

(A0 = VIL, A1 = VIH, A6 = VIL)

Setup Next Sector Address

Read from Sector Address

(A0 = VIL, A1 = VIH, A6 = VIL)

No

Data = 01H?

Yes

Yes

Protection Other Sector

?

No

Remove VID from RESET

Write Reset Command

Sector Protection

Completed

Figure 27 Extended Sector Protection Algorithm

52

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