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JS28F256P30B95A bảng dữ liệu(PDF) 48 Page - Micron Technology

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Giải thích chi tiết về linh kiện  Numonyx StrataFlash Embedded Memory
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P30
Datasheet
August 2008
48
306666-12
Each OTP Register has an associated Lock Register bit. When a Lock Register bit is
programmed, the associated OTP Register can only be read; it can no longer be
programmed. Additionally, because the Lock Register bits themselves are OTP, when
programmed, Lock Register bits cannot be erased. Therefore, when a OTP Register is
locked, it cannot be unlocked.
.
11.3.1
Reading the OTP registers
The OTP registers can be read from any address. To read the OTP Register, first issue
the Read Device Identifier command at any address to place the device in the Read
Device Identifier state (see Section 6.0, “Command Set” on page 24). Next, perform a
read operation using the address offset corresponding to the register to be read.
Table 13, “Device Identifier Information” on page 28 shows the address offsets of the
OTP Registers and Lock Registers. PR data is read 16 bits at a time.
Figure 16: OTP register map
0x89
Lock Register 1
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
0x102
0x109
0x8A
0x91
128-bit Protection Register 16
(User-Programmable)
128-bit Protection Register 1
(User-Programmable)
0x88
0x85
64-bit Segment
(User-Programmable)
0x84
0x81
0x80
Lock Register 0
64-bit Segment
(Factory-Programmed)
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
128-Bit Protection Register 0



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