MT29C4G48MAZAPAKD-5 E IT Micron, MT29C4G48MAZAPAKD-5 E IT Datasheet - Page 51

• Manufacturer Part Number: MT29C4G48MAZAPAKD-5 E IT
• Manufacturer: Micron

READ UNIQUE ID (EDh)
Figure 30: READ UNIQUE ID (EDh) Operation
PDF: 09005aef83ba4387
168ball_nand_lpddr_j42p_j4z2_j4z3_omap.pdf – Rev. H 3/11
Cycle type
I/O[7:0]
R/B#
Command
EDh
The READ UNIQUE ID (EDh) command is used to read a unique identifier programmed
into the target. This command is accepted by the target only when all die (LUNs) on the
target are idle.
Writing EDh to the command register puts the target in read unique ID mode. The tar-
get stays in this mode until another valid command is issued.
When the EDh command is followed by an 00h address cycle, the target goes busy for
t
the READ MODE (00h) command must be used to re-enable data output mode.
After
asynchronous interface is active, one data byte is output per RE# toggle.
Sixteen copies of the unique ID data are stored in the device. Each copy is 32 bytes. The
first 16 bytes of a 32-byte copy are unique data, and the second 16 bytes are the comple-
ment of the first 16 bytes. The host should XOR the first 16 bytes with the second 16
bytes. If the result is 16 bytes of FFh, then that copy of the unique ID data is correct. In
the event that a non-FFh result is returned, the host can repeat the XOR operation on a
subsequent copy of the unique ID data. If desired, the RANDOM DATA READ (05h-E0h)
command can be used to change the data output location.
The upper eight I/Os on a x16 device are not used and are a “Don’t Care” for x16 devices.
R. If the READ STATUS (70h) command is used to monitor for command completion,
t
R completes, the host enables data output mode to read the unique ID. When the
Address
00h
t WB
168-Ball NAND Flash and LPDDR PoP (TI OMAP) MCP
t R
t RR
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D
U0
OUT
0
Micron Technology, Inc. reserves the right to change products or specifications without notice.
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U1
OUT
0
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OUT
READ UNIQUE ID (EDh)
D
U0
OUT
1
© 2009 Micron Technology, Inc. All rights reserved.
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U1
OUT
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D
…
OUT