Datasheet

©2011 Silicon Storage Technology, Inc. DS25078A 11/11
17
2 Mbit SPI Serial Flash
SST25VF020
Not Recommended for New Designs
A
Microchip Technology Company
Read-ID
The Read-ID instruction identifies the device as SST25VF020 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 manufacturer’s and
device ID output data toggles between address 00000H and 00001H until terminated by a low to high
transition on CE#.
Figure 15:Read-ID Sequence
Table 6: Product Identification
Address Data
Manufacturer’s ID 00000H BFH
Device ID
SST25VF020 00001H 43H
T6.0 25078
1231 F14.1
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#.
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