tmp89fm42k TOSHIBA Semiconductor CORPORATION, tmp89fm42k Datasheet - Page 374

• Manufacturer Part Number: tmp89fm42k
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22.8
Operation Commands
RA003
Note 4: If the security program is enabled in flash memory or if a password error occurs, the TMP89FM42K stops communication,
Note 5: If a communication error occurs during the transfer of a password address or a password string, the TMP89FM42K stops
Note 6: If all data in flash memory are the same data, make sure that you never write data to the address 0xFFE0 through 0xFFFF.
Note 7: The n-th-2 byte is a flag for detecting an overwrite. If memory contents at an address where data is to be written are other
address is/are incorrect, a password error occurs, the TMP89FM42K stops communication, and it goes into an idle state.
Therefore, if a password error occurs, initialize the TMP89FM42K by using the RESET pin, and restart the serial PROM
mode.
and goes into an idle state. Therefore, if a password error occurs, initialize the TMP89FM42K by using the RESET pin,
and restart the serial PROM mode.
communication and goes into an idle state. Therefore, when a password error occurs, initialize the TMP89FM42K by using
the RESET pin, and restart the serial PROM mode.
If data is written to this address, a password error occurs, and the subsequent operations cannot be performed.
than 0xFF, the n-th-2 byte is 0xAA (data is not written to this address, and the data write routine is skipped). The checksum
at the n-th-1 byte or n-th byte is calculated based on data in which data in memory areas where data was not written are
included. Therefore, if an overwrite is detected, the checksum of transmitted data does not match that at the n-th-1 byte
or n-th byte.
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TMP89FM42K