MBM29LV001BC-55PFTR データシートの表示（PDF） - Fujitsu

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MBM29LV001BC-55PFTR

FLASH MEMORY CMOS 1M (128K × 8) BIT

Fujitsu 

MBM29LV001TC-55/-70/MBM29LV001BC-55/-70

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 21 Extended Sector Protection Algorithm

44

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