Datasheet

©2013 Silicon Storage Technology, Inc. DS20005054C 04/13
24
2 Mbit SPI Serial Flash
SST25VF020B
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 [A
23
-A
0
]. 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 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 7 and 8 for device identification data.
Figure 23:Read-ID Sequence
Table 8: Product Identification
Address Data
Manufacturer’s ID 00000H BFH
Device ID
SST25VF020B 00001H 8CH
T8.0 25054
1417 RdID.0
CE#
SO
SI
SCK
00
012345678
00 ADD
1
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 = 8CH for SST25VF020B
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