©2002-2016

DS20005022C

04/16

10

1 Mbit / 2 Mbit / 4 Mbit Multi-Purpose Flash

SST39SF010A / SST39SF020A / SST39SF040

Data Sheet

Operations

Table 3: Operation Modes Selection

Mode

CE#

OE#

WE#

DQ

Address

Read

VIL

VIL

VIH

DOUT

AIN

Program

VIL

VIH

VIL

DIN

AIN

Erase

VIL

VIH

VIL

X1

1. X can be VIL or VIH, but no other value.

Sector address, XXH for Chip-Erase

Standby

VIH

X

X

High Z

X

Write Inhibit

X

VIL

X

High Z/ DOUT

X

XX

VIH

High Z/ DOUT

X

Product Identification

Software Mode

VIL

VIL

VIH

See Table 4

T3.3 25022

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

1. Address format A14-A0 (Hex), Addresses AMS-A15 can be VIL or VIH, but no other value, for the Command sequence.

AMS = Most significant address

AMS = A16 for SST39SF010A, A17 for SST39SF020A, and A18 for SST39SF040

Data

Addr1

Data

Addr1

Data

Addr1

Data

Addr1

Data

Addr1

Data

Byte-Program

5555H

AAH

2AAAH

55H

5555H

A0H

BA2

2. BA = Program Byte address

Data

Sector-Erase

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

SAX3

3. SAX for Sector-Erase; uses AMS-A12 address lines

30H

Chip-Erase

5555H

AAH

2AAAH

55H

5555H

80H

5555H

AAH

2AAAH

55H

5555H

10H

Software ID Entry4,5

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,

SST39SF010A Device ID = B5H, is read with A0 = 1

SST39SF020A Device ID = B6H, is read with A0 = 1

SST39SF040 Device ID = B7H, is read with A0 = 1

5555H

AAH

2AAAH

55H

5555H

90H

Software ID Exit6

6. Both Software ID Exit operations are equivalent

XXH

F0H

Software ID Exit6

5555H

AAH

2AAAH

55H

5555H

F0H

T4.2 25022