JS28F128P30T85 Micron Technology Inc, JS28F128P30T85 Datasheet - Page 48

• Manufacturer Part Number: JS28F128P30T85
• Manufacturer: Micron Technology Inc

Specifications of JS28F128P30T85

• Cell Type: NOR
• Density: 128Mb
• Access Time (max): 85/17ns
• Interface Type: Parallel/Serial
• Boot Type: Top
• Address Bus: 23b
• Operating Supply Voltage (typ): 1.8V
• Operating Temp Range: -40C to 85C
• Package Type: TSOP
• Program/erase Volt (typ): 1.7 to 2/8.5 to 9.5V
• Sync/async: Async/Sync
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 1.7V
• Operating Supply Voltage (max): 2V
• Word Size: 16b
• Number Of Words: 8M
• Supply Current: 28mA
• Mounting: Surface Mount
• Pin Count: 56
• Lead Free Status / Rohs Status: Compliant

Figure 16: OTP register map
11.3.1
Datasheet
48
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.
.
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
read operation using the address offset corresponding to the register to be read.
Table 13, “Device Identifier Information” on page 28
OTP Registers and Lock Registers. PR data is read 16 bits at a time.
0x109
0x102
0x8A
0x91
0x89
0x88
0x85
0x84
0x81
0x80
15 14 13 12 11 10 9
15 14 13 12 11 10 9
128-bit Protection Register 16
128-bit Protection Register 1
128-Bit Protection Register 0
(Factory-Programmed)
(User-Programmable)
(User-Programmable)
(User-Programmable)
Lock Register 1
64-bit Segment
64-bit Segment
Section 6.0, “Command Set” on page
Lock Register 0
8
8
7
7
6
6
5
5
4
4
3
3
2
2
1
1
0
0
shows the address offsets of the
24). Next, perform a
August 2008
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