©2011 Silicon Storage Technology, Inc.

S71327-04-000

02/11

21

32 Mbit SPI Serial Flash

SST25VF032B

Data Sheet

A Microchip Technology Company

JEDEC Read-ID

The JEDEC Read-ID instruction identifies the device as SST25VF032B and the manufacturer as SST.

The device information can be read from executing the 8-bit command, 9FH. Following the JEDEC

Read-ID instruction, the 8-bit manufacturer’s ID, BFH, is output from the device. After that, a 24-bit

device ID is shifted out on the SO pin. Byte 1, BFH, identifies the manufacturer as SST. Byte 2, 25H,

identifies the memory type as SPI Serial Flash. Byte 3, 4AH, identifies the device as SST25VF032B.

The instruction sequence is shown in Figure 21. The JEDEC Read ID instruction is terminated by a low

to high transition on CE# at any time during data output.

Figure 21:JEDEC Read-ID Sequence

Table 7: JEDEC Read-ID Data

Device ID

Manufacturer’s ID

Memory Type

Memory Capacity

Byte1

Byte 2

Byte 3

BFH

25H

4AH

T7.0 1327

25

4A

1327 F22.0

CE#

SO

SI

SCK

012345678

HIGH IMPEDANCE

15 16

14

28 29 30 31

BF

MODE 3

MODE 0

MSB

MSB

9 10111213

1718

32

34

9F

19 20 21 22 23

33

24 25 26 27