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SST25VF080B

8 Mbit SPI Serial Flash

Silicon Storage Technology 

A Microchip Technology Company

8 Mbit SPI Serial Flash

SST25VF080B

Data Sheet

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

executing an 8-bit command, 90H or ABH, followed by address bits [A23-A0]. Following the 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 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.

CE#

SCK

MODE 3

MODE 0

0 1 2345 6 78

15 16

23 24 31 32 39 40

47 48 55 56 63

SI

90 or AB

00

00

ADD1

MSB

MSB

HIGH

SO

HIGH IMPEDANCE

BF

Device ID

BF

IMPEDANCE

Device ID

MSB

1265 RdID.0

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.

Figure 21:Read-ID Sequence

Table 7: Product Identification

Manufacturer’s ID

Device ID

SST25VF080B

Address

00000H

00001H

Data

BFH

8EH

T7.0 1296

©2011 Silicon Storage Technology, Inc.

22

S71296-05-000

02/11

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