TMP86FS49AIUG datasheet(262/296 Pages) TOSHIBA

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Page 246

20. Serial PROM Mode

20.6 Operation Mode

TMP86FS49AIUG

20.6.3 RAM Loader Mode (Operation Command: 60H)

Table 20-9 shows RAM loader mode process.

Note 1: “xxH

× 3” indicates that the device enters the halt condition after sending 3 bytes of xxH. For details, refer to " 20.7 Error

Code ".

Note 2: Refer to " 20.9 Intel Hex Format (Binary) ".

Note 3: Refer to " 20.8 Checksum (SUM) ".

Note 4: Refer to " 20.10 Passwords ".

Note 5: If addresses from FFE0H to FFFFH are filled with “FFH”, the passwords are not compared because the device is consid-

ered as a blank product. Transmitting a password string is not required. Even in the case of a blank product , it is required

to specify the password count storage address and the password comparison start address. Transmit these data from the

external controller. If a password error occurs due to incorrect password count storage address or password comparison

start address, TMP86FS49AIUG stops UART communication and enters the halt condition. Therefore, when a password

error occurs, initialize TMP86FS49AIUG by the RESET pin and reactivate the serial ROM mode.

Note 6: After transmitting a password string, the external controller must not transmit only an end record. If receiving an end

record after a password string, the device may not operate correctly.

Note 7: If the read protection is enabled or a password error occurs, TMP86FS49AIUG stops UART communication and enters

the halt condition. In this case, initialize TMP86FS49AIUG by the RESET pin and reactivate the serial PROM mode.

Table 20-9 RAM Loader Mode Process

Transfer Bytes

Transfer Data from External Control-

ler to TMP86FS49AIUG

Baud Rate

Transfer Data from TMP86FS49AIUG to

External Controller

BOOT

ROM

1st byte

2nd byte

Matching data (5AH)

9600 bps

- (Automatic baud rate adjustment)

OK: Echo back data (5AH)

Error: Nothing transmitted

3rd byte

4th byte

Baud rate modification data

(See Table 20-4)

9600 bps

OK: Echo back data

Error: A1H

× 3, A3H × 3, 62H × 3 (Note 1)

5th byte

6th byte

Operation command data (60H)

Modified baud rate

OK: Echo back data (60H)

Error: A1H

× 3, A3H × 3, 63H × 3 (Note 1)

7th byte

8th byte

Password count storage address bit

15 to 08 (Note 4)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

9th byte

10th byte

Password count storage address bit

07 to 00 (Note 4)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

11th byte

12th byte

Password comparison start address

bit 15 to 08 (Note 4)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

13th byte

14th byte

Password comparison start address

bit 07 to 00 (Note 4)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

15th byte

m’th byte

Password string (Note 5)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

m’th + 1 byte

n’th - 2 byte

Intel Hex format (Binary)

(Note 2)

Modified baud rate

n’th - 1 byte

Modified baud rate

OK: SUM (Upper byte) (Note 3)

Error: Nothing transmitted

n’th byte

Modified baud rate

OK: SUM (Lower byte) (Note 3)

Error: Nothing transmitted

RAM

The program jumps to the start address of RAM in which the first transferred data is written.

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