
2 Mbit SPI Serial Flash
A Microchip Technology Company
SST25LF020A
Not Recommended for New Designs
Read-ID
The Read-ID instruction identifies the devices as SST25LF020A 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#.
Table 6: Product Identification
Address
Data
Manufacturer’s ID
Device ID
SST25LF020A
00000H
00001H
BFH
43H
T6.0 25080
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
MSB
90 or AB
00
00
ADD 1
MSB
HIGH
SO
HIGH IMPEDANCE
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#.
1. 00H will output the manfacturer s ID first and 01H will output device ID first before toggling between the two.
1242 F15.0
Figure 16: Read-ID Sequence
?2011 Silicon Storage Technology, Inc.
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DS25080A
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