TMP86FS49AFG Toshiba Semiconductor, TMP86FS49AFG Datasheet - Page 270

• Manufacturer Part Number: TMP86FS49AFG
• Description: 8-Bit Microcontroller
• Manufacturer: Toshiba Semiconductor

20.7 Error Code
20.7 Error Code
20.8 Checksum (SUM)
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20.8.1 Calculation Method
When detecting an error, the device transmits the error code to the external controller, as shown in Table 20-14.
Note: If a password error occurs, TMP86FS49AFG does not transmit an error code.
or flash memory SUM output command is calculated in the manner, as shown above.
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,
Table 20-14 Error Code
A1H, A1H, A1H
A3H, A3H, A3H
62H, 62H, 62H
63H, 63H, 63H
Transmit Data
A1H
B2H
C3H
D4H
If the data to be calculated consists of the four bytes,
the checksum of the data is as shown below.
A1H + B2H + C3H + D4H = 02EAH
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Framing error in the received data.
Overrun error in the received data.
Baud rate modification error.
Operation command error.
SUM (HIGH)= 02H
SUM (LOW)= EAH
Meaning of Error Data
TMP86FS49AFG