tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 395

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

22.12
Security
RA003
Note 3: The data including the same consecutive data (three or more bytes) cannot be used as a password. (A password error
Note 4: In flash memory writing mode or RAM loader mode, the blank product receives the Intel Hex format data immediately after
Note 5: In executing the flash memory erase command, do not transmit a password string to a blank product.
occurs during password authentication. The TMP89FM42A does not transmit any data and goes into an idle state.)
receiving PCSA; it does not receive password strings. In this case, the subsequent processing is performed correctly
because the TMP89FM42A keeps ignoring incoming data until the start mark (0x3A ":") in the Intel Hex format is detected,
even if the external controller transmits the dummy password string. However, if the dummy password string contains
"0x3A", it is detected as the start mark erroneously, and the microcontroller enters the halt mode. If this causes a problem,
do not transmit the dummy password strings.
Page 376
TMP89FM42A