SST25VF040B SST, SST25VF040B Datasheet - Page 19

• Manufacturer Part Number: SST25VF040B
• Description: 4 Mbit SPI Serial Flash
• Manufacturer: SST

4 Mbit SPI Serial Flash
SST25VF040B
JEDEC Read-ID
The JEDEC Read-ID instruction identifies the device as
SST25VF040B and the manufacturer as SST. The device
information can be read from executing the 8-bit command,
9FH. Following the JEDEC Read-ID instruction, the 8-bit
manufacturer’s ID, BFH, is output from the device. After
that, a 16-bit device ID is shifted out on the SO pin. Byte 1,
TABLE 6: JEDEC R
©2006 Silicon Storage Technology, Inc.
Manufacturer’s ID
FIGURE 19: JEDEC R
Byte1
BFH
SCK
CE#
SO
SI
HIGH IMPEDANCE
MODE 3
MODE 0
Memory Type
EAD
0 1 2 3 4 5 6 7 8
Byte 2
25H
EAD
-ID D
-ID S
9F
ATA
Device ID
EQUENCE
Memory Capacity
MSB
Byte 3
8DH
9 10 11 12 13
T6.0 1295
BF
14
19
15 16
MSB
BFH, identifies the manufacturer as SST. Byte 2, 25H, iden-
tifies the memory type as SPI Serial Flash. Byte 3, 8DH,
identifies the device as SST25VF040B. The instruction
sequence is shown in Figure 19. The JEDEC Read ID
instruction is terminated by a low to high transition on CE#
at any time during data output.
17 18
19 20 21 22 23
25
24 25 26 27
8D
1295 JEDECID.1
28 29 30 31
32
S71295-01-000
33
34
Data Sheet
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