TMP89FS60 datasheet(374/410 Pages) TOSHIBA

374 / 410 page

Page 360

22. Serial PROM Mode

22.12 Security

TMP89FS60

RA002

Note 1: *: Don’t care.

Note 2: When addresses from 0xFFE0 through 0xFFFF are filled with "0xFF", the product is recognized as a blank product.

Note 3: The data including the same consecutive data (three or more bytes) cannot be used as a password. (A password error

occurs during password authentication. The TMP89FS60 does not transmit any data and goes into an idle state.)

Note 4: In flash memory writing mode or RAM loader mode, the blank product receives the Intel Hex format data immediately after

receiving PCSA; it does not receive password strings. In this case, the subsequent processing is performed correctly

because the TMP89FS60 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.

Note 5: In executing the flash memory erase command, do not transmit a password string to a blank product.

TMP89FS60 Datasheet(PDF) 374 Page - Toshiba Semiconductor