SST25VF040-20-4C-QAE SST [Silicon Storage Technology, Inc], SST25VF040-20-4C-QAE Datasheet - Page 15

• Manufacturer Part Number: SST25VF040-20-4C-QAE
• Description: 4 Mbit SPI Serial Flash
• Manufacturer: SST [Silicon Storage Technology, Inc]

4 Mbit SPI Serial Flash
SST25VF040
Read-ID
The Read-ID instruction identifies the devices as
SST25VF040 and manufacturer as SST. The device infor-
mation can be read from executing an 8-bit command, 90H
or ABH, followed by address bits [A
Read-ID instruction, the manufacturer’s ID is located in
©2006 Silicon Storage Technology, Inc.
FIGURE 15: Read-ID Sequence
SCK
CE#
SO
SI
Note: The manufacturer s and device ID output stream is continuous until terminated by a low to high transition on CE#.
MODE 3
MODE 0
1. 00H will output the manfacturer s ID first and 01H will output device ID first before toggling between the two.
MSB
0 1 2 3 4 5 6 7 8
90 or AB
HIGH IMPEDANCE
23
-A
0
]. Following the
00
15 16
00
23 24
MSB
15
ADD
address 00000H and the device ID is located in address
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#.
31 32
1
MSB
BF
39 40
Device ID
47 48
BF
55 56
Device ID
EOL Product Data Sheet
63
IMPEDANCE
S71231(04)-01-EOL
HIGH
1231 F14.1
09/10