39SF020 datasheet(6/23 Pages) SST

6 / 23 page

326-10 12/98

2 Megabit Multi-Purpose Flash

SST39SF020

Preliminary Specifications

TABLE 4: SOFTWARE COMMAND SEQUENCE

Command

1st Bus

2nd Bus

3rd Bus

4th Bus

5th Bus

6th Bus

Sequence

Write Cycle

Addr(1) Data

Addr(1)

Data

Addr(1)

Data

Addr(1)

Data

Addr(1)

Data

Addr(1) Data

Byte Program

5555H

AAH

2AAAH

55H

5555H

A0H

BA(3)

Data

Sector Erase

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

SAx(2)

30H

Chip Erase

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

5555H

10H

Software ID Entry

5555H

AAH

2AAAH

55H

5555H

90H

Software ID Exit

XXH

F0H

Software ID Exit

5555H

AAH

2AAAH

55H

5555H

F0H

Notes:

(1) Address format A14-A0 (Hex), Addresses A15, A16 and A17 are a “Don’t Care” for the

Command sequence.

(2) SAx for sector erase; uses A17-A12 address lines

(3) BA = Program Byte address

(4) Both Software ID Exit operations are equivalent

Notes for Software ID Entry Command Sequence

1. With A17 -A1 =0; SST Manufacturer Code = BFH, is read with A0 = 0,

SST39SF020 Device Code = B6H, is read with A0 = 1.

2. The device does not remain in Software Product ID Mode if powered down.

326 PGM T4.0

39SF020 Datasheet(PDF) 6 Page - Silicon Storage Technology, Inc

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