20

Data Sheet

8 Mbit SPI Serial Flash

SST25VF080B

©2010 Silicon Storage Technology, Inc.

S71296-04-000

01/10

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 multiple versions of SPI Serial

Flash devices are used in a design. The device information

can be read from executing an 8-bit command, 90H or

Read-ID 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 manu-

facturer’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

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

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 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

TABLE

7: Product Identification

Address

Data

Manufacturer’s ID

00000H

BFH

Device ID

SST25VF080B

00001H

8EH

T7.0 1296