TMP86FS49AIUG datasheet(257/296 Pages) TOSHIBA

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Page 241

TMP86FS49AIUG

20.6.1 Flash Memory Erasing Mode (Operating command: F0H)

Table 20-7 shows the flash memory erasing mode.

Note 1: “xxH

× 3” indicates that the device enters the halt condition after transmitting 3 bytes of xxh.

Note 2: Refer to " 20.13 Specifying the Erasure Area ".

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

Note 4: Refer to " 20.10 Passwords ".

Note 5: Do not transmit the password string for a blank product.

Note 6: When a password error occurs, TMP86FS49AIUG stops UART communication and enters the halt mode. Therefore,

when a password error occurs, initialize TMP86FS49AIUG by the RESET pin and reactivate the serial PROM mode.

Note 7: If an error occurs during transfer of a password address or a password string, TMP86FS49AIUG stops UART communica-

tion and enters the halt condition. Therefore, when a password error occurs, initialize TMP86FS49AIUG by the RESET pin

and reactivate the serial PROM mode.

Description of the flash memory erasing mode

1. The 1st through 4th bytes of the transmitted and received data contain the same data as in the flash

memory writing mode.

Table 20-7 Flash Memory Erasing Mode

Transfer Byte

Transfer Data from the External

Controller to TMP86FS49AIUG

Baud Rate

Transfer Data from TMP86FS49AIUG to

the External Controller

BOOT

ROM

1st byte

2nd byte

Matching data (5AH)

9600 bps

- (Automatic baud rate adjustment)

OK: Echo back data (5AH)

Error: No data transmitted

3rd byte

4th byte

Baud rate change data (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 (F0H)

Modified baud rate

OK: Echo back data (F0H)

Error: A1H

× 3, A3H × 3, 63H × 3 (Note 1)

7th byte

8th byte

Password count storage address bit

15 to 08 (Note 4, 5)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

9th byte

10th byte

Password count storage address bit

07 to 00 (Note 4, 5)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

11th byte

12th byte

Password comparison start address

bit 15 to 08 (Note 4, 5)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

13th byte

14th byte

Password comparison start address

bit 07 to 00 (Note 4, 5)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted)

15th byte

m’th byte

Password string (Note 4, 5)

Modified baud rate

OK: Nothing transmitted

Error: Nothing transmitted

n’th - 2 byte

Erase area specification (Note 2)

Modified baud rate

n’th - 1 byte

Modified baud rate

OK: Checksum (Upper byte) (Note 3)

Error: Nothing transmitted

n’th byte

Modified baud rate

OK: Checksum (Lower byte) (Note 3)

Error: Nothing transmitted

n’th + 1 byte

(Wait for the next operation command

data)

Modified baud rate

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