©2011 Silicon Storage Technology, Inc.

S71296-05-000

02/11

22

8 Mbit SPI Serial Flash

SST25VF080B

Data Sheet

A Microchip Technology Company

Read-ID (RDID)

The Read-ID instruction (RDID) identifies the devices as SST25VF080B and manufacturer as SST.

This command is backward compatible and should be used as default device identification when multi-

ple versions of SPI Serial Flash devices are used in a design. The device information can be read from

instruction, the manufacturer’s ID is located in address 00000H and the device ID is located in address

00001H. Once the device is in Read-ID mode, the manufacturer’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 21:Read-ID Sequence

Table 7: Product Identification

Address

Data

Manufacturer’s ID

00000H

BFH

Device ID

SST25VF080B

00001H

8EH

T7.0 1296

1265 RdID.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

HIGH

IMPEDANCE

MODE 3

MODE 0

MSB

MSB

MSB

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

CE#.

Device ID = 8EH for SST25VF080B

1

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