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номер детали GD5F1GQ4REFJS
подробное описание детали  SPI(x1/x2/x4) NAND Flash
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домашняя страница  http://www.gigadevice.com/
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SPI(x1/x2/x4) NAND Flash
1G
24
9.2 Read UID
The Read Unique ID function is used to retrieve the 16 byte unique ID (UID) for the device. The unique ID when combined
with the device manufacturer shall be unique.
The UID data may be stored within the Flash array. To allow the host to determine if the UID is without bit errors, the UID is
returned with its complement. If the XOR of the UID and its bit-wise complement is all ones, then the UID is valid. To
accommodate robust retrieval of the UID in the case of bit errors, sixteen copies of the UID and the corresponding
complement shall be stored by the target. For example, reading bytes 32-63 returns to the host another copy of the UID
and its complement.
Bytes
Value
0-15
UID
16-31
UID complement (bit-wise)
The Read UID command sequence is as follows:
1.
Use EDh+00h read UID from array to cache.
2.
Use 0FH (GET FEATURES command ) read the status
3.
User can use Read from cache command (03H/0BH/3BH/6BH/BBH/EBH), read UID from cache.
Read UID to Cache (EDH+00H) + Get Feature (0FH)
Figure9-2. Read UID to cache and Get Feature command Sequence Diagram
Command
0
1
2
3
4
5
6
7
EDH
CS#
SCLK
SI
SO
High-Z
8
9 10
Command
CS#
Get Feature
0
1
2
3
4
5
6
7
0FH
CS#
SLK
SI
SO
High-Z
8
9 10 11 12 13 14 15
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
MSB
1 byte address
Data byte
MSB
SCLK
SI
SO
tCS
16 17 18 19 20 21 22 23 24
00H
11
14
12 13
15



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