128Mb, 256Mb, 512Mb, 1Gb StrataFlash Memory
One-Time Programmable Operations
Programming OTP Area
OTP area programming is performed 16 bits at a time; only zeros within the data word
affect any change to the OTP bits.
To program any OTP blocks or lock registers, first issue the PROGRAM OTP AREA SET-
UP command at any device address. The read state of that partition changes to read sta-
tus. Next, write the desired OTP data at the desired OTP address.
Attempting to program outside of the OTP area causes a program error (SR[4] = 1).
Attempting to program a locked OTP block causes a program error and a lock error
(SR[4] = 1, SR[1] = 1).
OTP area programming cannot be suspended. Dual operations between the parameter
partition and the OTP area are not allowed.
Reading OTP Area
The OTP area is read from within the address space of any partition. To read from the
OTP area. the following must be done:
1. Issue the READ ID command at the address of any partition to place that partition
in the read ID state.
2. Perform a READ operation at the base address of that partition, plus the address
offset corresponding to the OTP word to be read. Data is read 16 bits at a time.
If a PROGRAM or ERASE operation occurs within the device while it is reading from the
OTP area, certain restrictions may apply.
PDF: 09005aef8448483a
128_256_512_65nm_g18.pdf - Rev. F 8/11 EN
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