TMP86FS23UG datasheet(228/252 Pages) TOSHIBA

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Page 216

19. Serial PROM Mode

19.7 Error Code

TMP86FS23UG

19.7 Error Code

When detecting an error, the device transmits the error code to the external controller, as shown in Table 19-14.

Note: If a password error occurs, TMP86FS23UG does not transmit an error code.

19.8 Checksum (SUM)

19.8.1 Calculation Method

The checksum (SUM) is calculated with the sum of all bytes, and the obtained result is returned as a word.

The data is read for each byte unit and the calculated result is returned as a word.

Example:

The checksum which is transmitted by executing the flash memory write command, RAM loader command,

or flash memory SUM output command is calculated in the manner, as shown above.

Table 19-14 Error Code

Transmit Data

Meaning of Error Data

62H, 62H, 62H

Baud rate modification error.

63H, 63H, 63H

Operation command error.

A1H, A1H, A1H

Framing error in the received data.

A3H, A3H, A3H

Overrun error in the received data.

A1H

If the data to be calculated consists of the four bytes,

the checksum of the data is as shown below.

B2H

A1H + B2H + C3H + D4H = 02EAH

SUM (HIGH)= 02H

SUM (LOW)= EAH

C3H

D4H

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