SST29SF040 datasheet(6/22 Pages) SST

6 / 22 page

Data Sheet

4 Mbit Small-Sector Flash

SST29SF040 / SST29VF040

S71160-10-000

2/04

TABLE

4: SOFTWARE COMMAND SEQUENCE

Command

Sequence

1st Bus

Write Cycle

2nd Bus

Write Cycle

3rd Bus

Write Cycle

4th Bus

Write Cycle

5th Bus

Write Cycle

6th Bus

Write Cycle

Addr1

Data

Addr1

Data

Addr1

Data

Addr1

Data

Addr1

Data

Addr1

Data

Byte-Program

555H

AAH

2AAH

55H

555H

A0H

BA2

Data

Sector-Erase

555H

AAH

2AAH

55H

555H

80H

555H

AAH

2AAH

55H

SAX3

20H

Chip-Erase

555H

AAH

2AAH

55H

555H

80H

555H

AAH

2AAH

55H

555H

10H

Software ID Entry4,5

555H

AAH

2AAH

55H

555H

90H

Software ID Exit6

XXH

F0H

Software ID Exit6

555H

AAH

2AAH

55H

555H

F0H

T4.6 1160

1. Address format A14-A0 (Hex),

Addresses AMS-A15 can be VIL or VIH, but no other value, for the Command sequence for SST29SF/VF040.

AMS = Most significant address

AMS = A18 for SST29SF/VF040.

2. BA = Program Byte address

3. SAX for Sector-Erase; uses AMS-A7 address lines for SST29SF/VF040

4. The device does not remain in Software Product ID mode if powered down.

5. With AMS-A1 = 0; SST Manufacturer’s ID = BFH, is read with A0 = 0,

SST29SF040 Device ID = 13H, is read with A0 = 1

SST29VF040 Device ID = 14H, is read with A0 = 1

6. Both Software ID Exit operations are equivalent

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