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GD5F2GQ4REZJS 데이터시트(PDF) 23 Page - GigaDevice Semiconductor (Beijing) Inc.

부품명 GD5F2GQ4REZJS
상세설명  SPI(x1/x2/x4) NAND Flash
PDF  57 Pages
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제조업체  GIGADEVICE [GigaDevice Semiconductor (Beijing) Inc.]
홈페이지  http://www.gigadevice.com/
Logo GIGADEVICE - GigaDevice Semiconductor (Beijing) Inc.

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SPI(x1/x2/x4) NAND Flash
2G
23
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)



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