TMP86FS28DFG datasheet(240/272 Pages) TOSHIBA

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Page 228

18. Serial PROM Mode

18.6 Operation Mode

TMP86FS28DFG

18.6.2 Flash Memory Writing Mode (Operation command: 30H)

Table 18-8 shows flash memory writing mode process.

Note 1: “xxH

× 3” indicates that the device enters the halt condition after sending 3 bytes of xxH. For details, refer to " 18.7 Error

Code ".

Note 2: Refer to " 18.9 Intel Hex Format (Binary) ".

Note 3: Refer to " 18.8 Checksum (SUM) ".

Note 4: Refer to " 18.10 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, TMP86FS28DFG stops UART communication and enters the halt condition. Therefore, when a password

error occurs, initialize TMP86FS28DFG by the RESET pin and reactivate the serial ROM mode.

Note 6: If the read protection is enabled or a password error occurs, TMP86FS28DFG stops UART communication and enters the

halt confition. In this case, initialize TMP86FS28DFG by the RESET pin and reactivate the serial ROM mode.

Note 7: If an error occurs during the reception of a password address or a password string, TMP86FS28DFG stops UART com-

munication and enters the halt condition. In this case, initialize TMP86FS28DFG by the RESET pin and reactivate the

serial PROM mode.

Table 18-8 Flash Memory Writing Mode Process

Transfer Byte

Transfer Data from External Controller

to TMP86FS28DFG

Baud Rate

Transfer Data from TMP86FS28DFG 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 18-4)

9600 bps

OK: Echo back data

Error: A1H

× 3, A3H × 3, 62H × 3 (Note 1)

5th byte

6th byte

Operation command data (30H)

Modified baud rate

OK: Echo back data (30H)

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

n’th + 1 byte

(Wait state for the next operation com-

mand data)

Modified baud rate

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