RC28F256P30TFB Micron Technology Inc, RC28F256P30TFB Datasheet - Page 46

• Manufacturer Part Number: RC28F256P30TFB
• Manufacturer: Micron Technology Inc

Specifications of RC28F256P30TFB

• Cell Type: NOR
• Density: 256Mb
• Access Time (max): 100ns
• Interface Type: Parallel/Serial
• Boot Type: Top
• Address Bus: 24b
• Operating Supply Voltage (typ): 1.8V
• Operating Temp Range: -40C to 85C
• Package Type: EZBGA
• 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: 16M
• Supply Current: 31mA
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Not Compliant

Figure 16: OTP Register Map
11.3.1
Datasheet
46
are blank. Users can program these registers as needed. Once programmed, users can
then lock the OTP Register(s) to prevent additional bit programming (see
“OTP Register Map” on page
The OTP Registers contain one-time programmable (OTP) bits; when programmed, PR
bits cannot be erased. Each OTP Register can be accessed multiple times to program
individual bits, as long as the register remains unlocked.
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 OTP-RA address. To read the OTP Register, first
issue the Read Device Identifier command at OTP-RA address to place the device in the
Read Device Identifier state (see
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
Lock Register 0
46).
8
8
Section 6.0, “Command Set” on page
7
7
6
6
5
5
4
4
3
3
2
2
1
1
0
0
Order Number: 320002-10
21). Next,
Figure 16,
P30-65nm
Mar 2010