SST25VF020B View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

Manufacturer

SST25VF020B

2 Mbit SPI Serial Flash

Silicon Storage Technology 

Data Sheet

Read-ID (RDID)

The Read-ID instruction (RDID) identifies the devices as

SST25VF020B and manufacturer as SST. 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

2 Mbit SPI Serial Flash

SST25VF020B

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 7 and 8 for device identification data.

CE#

MODE 3 0 1 2 3 4 5 6 7 8

15 16

23 24 31 32 39 40 47 48 55 56

63

SCK MODE 0

SI

90 or AB

00

00

ADD1

MSB

MSB

HIGH

HIGH IMPEDANCE

SO

BF Device ID BF Device ID IMPEDANCE

MSB

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

Device ID = 8CH for SST25VF020B

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

1417 RdID.0

FIGURE 23: Read-ID Sequence

TABLE 8: Product Identification

Address

Manufacturer’s ID

Device ID

SST25VF020B

00000H

00001H

Data

BFH

8CH

T8.0 1417

©2010 Silicon Storage Technology, Inc.

22

S71417-02-000

04/10

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