©2011 Silicon Storage Technology, Inc.

S71327-04-000

02/11

20

32 Mbit SPI Serial Flash

SST25VF032B

Data Sheet

A Microchip Technology Company

Read-ID (RDID)

The Read-ID instruction (RDID) identifies the device as SST25VF032B and manufacturer as SST. The

device information can be read from executing an 8-bit command, 90H or ABH, followed by address

and the device ID is located in address 00001H. Once the device is in Read-ID mode, the manufac-

turer’s and device ID output data toggles between address 00000H and 00001H until terminated by a

low to high transition on CE#.

Refer to Tables 6 and 7 for device identification data.

Figure 20:Read-ID Sequence

Table 6: Product Identification

Address

Data

Manufacturer’s ID

00000H

BFH

Device ID

SST25VF032B

00001H

4AH

T6.0 1327

1327 F21.0

CE#

SO

SI

SCK

00

01 2 3 4 5 6 7 8

00

90 or AB

HIGH IMPEDANCE

15 16

23 24

31 32

39 40

47 48

55 56

63

BF

Device ID

BF

Device ID

Note: The manufacturer s and device ID output stream is continuous until terminated by a low to high transition on CE#.

1. 00H will output the manfacturer s ID first and 01H will output device ID first before toggling between the two.

HIGH

IMPEDANCE

MODE 3

MODE 0

MSB

MSB

MSB