S25FL032P datasheet(49/69 Pages) SPANSION

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January 29, 2013 S25FL032P_00_09

S25FL032P

Data

Sheet

9.22

OTP Program (OTPP)

The OTP Program command programs data in the OTP region, which is in a different address space from the

main array data. Refer to, OTP Regions on page 50 for details on the OTP region. The protocol of the OTP

Program command is the same as the Page Program command, except that the OTP Program command

requires exactly one byte of data; otherwise, the command will be ignored. To program the OTP in bit

granularity, the rest of the bits within the data byte can be set to “1”.

The OTP memory space can be programmed one or more times, provided that the OTP memory space is not

locked (as described in “Locking OTP Regions”). Subsequent OTP programming can be performed only on

the unprogrammed bits (that is, “1” data).

Note: The Write Enable (WREN) command must precede the OTPP command before programming of the

OTP can occur.

Figure 9.26 OTP Program Instruction Sequence

9.23

Read OTP Data Bytes (OTPR)

The Read OTP Data Bytes command reads data from the OTP region. Refer to “OTP Regions” for details on

the OTP region. The protocol of the Read OTP Data Bytes command is the same as the Fast Read Data

Bytes command except that it will not wrap to the starting address after the OTP address is at its maximum;

instead, the data will be indeterminate.

Figure 9.27 Read OTP Instruction Sequence

Instruction

24 Bit

Address

Data Byte 1

SCK

MSB

CS#

030

Instruction

24 Bit

Address

338

Dummy Byte

446

DATA OUT 1

DATA OUT 2

SCK

MSB

High Impedance

MSB

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