JS28F128P33TF70A datasheet(41/88 Pages) MICROCHIP

41 / 88 page

Datasheet

Jul 2011

Order Number:208034-04

P33-65nm SBC

11.2.1

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 Section 6.2, “Device Command Bus Cycles” on

page 18). Next, perform a read operation using the address offset corresponding to the

address offsets of the OTP Registers and Lock Registers. PR data is read 16 bits at a

time.

11.2.2

Programming the OTP Registers

To program any of the OTP Registers, first issue the Program OTP Register command at

the parameter’s base address plus the offset to the desired OTP Register (see Section

6.2, “Device Command Bus Cycles” on page 18). Next, write the desired OTP Register

data to the same OTP Register address (see Figure 12, “OTP Register Map” on

page 41).

Figure 12: OTP Register Map

0x89

Lock Register 1

15 14 13 12 11 10 9

0x102

0x109

0x8A

0x91

128-bit OTP Register 16

(User-Programmable)

128-bit OTP 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

128-Bit OTP Register 0

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