Philips CEM2100/00 Service Manual page 362

20. Serial PROM Mode
20.6 Operation Mode
6. Flash memory status output mode
The status of the area from FFE0H to FFFFH, and the security program condition are output as 7-byte code.
The external controller reads this code to recognize the flash memory status.
7. Flash memory security program setting mode
This mode disables reading and writing the flash memory data in parallel PROM mode. In the serial PROM
mode, the flash memory writing and RAM loader modes are disabled. To disable the flash memory security
program, perform the chip erase in the flash memory erasing mode.
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