tmp88f846ug TOSHIBA Semiconductor CORPORATION, tmp88f846ug Datasheet - Page 214

• Manufacturer Part Number: tmp88f846ug
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19.6 Operation Mode
19. Serial PROM Mode
Table 19-10 Flash Memory SUM Output Process
BOOT
19.6.4 Flash Memory SUM Output Mode (Operation Command: 90H)
ROM
Note 1: “xxH × 3” indicates that the device enters the halt condition after sending 3 bytes of xxH. For details, refer to " 19.7 Error
Note 2: Refer to " 19.8 Checksum (SUM) ".
1st byte
2nd byte
3rd byte
4th byte
5th byte
6th byte
7th byte
8th byte
9th byte
Table 19-10 shows flash memory SUM output mode process.
Description of the flash memory SUM output mode
Transfer Bytes
Code ".
1. The 1st through 4th bytes of the transmitted and received data contains the same data as in the flash
2. The 5th byte of the received data contains the command data in the flash memory SUM output mode
3. When the 5th byte of the received data contains the operation command data shown in Table 19-6, the
4. The 7th and the 8th bytes contain the upper and lower bits of the checksum, respectively. For how to
5. After sending the checksum, the device waits for the next operation command data.
memory writing mode.
(90H).
device echoes back the value which is the same data in the 6th byte position of the received data (in
this case, 90H). If the 5th byte of the received data does not contain the operation command data, the
device enters the halt condition after transmitting 3 bytes of operation command error code (63H).
calculate the checksum, refer to " 19.8 Checksum (SUM) ".
Matching data (5AH)
-
Baud rate modification data
(See Table 19-4)
-
Operation command data (90H)
-
-
-
(Wait for the next operation com-
mand data)
Transfer Data from External Control-
ler to TMP88F846UG
Page 204
9600 bps
9600 bps
9600 bps
9600 bps
Modified baud rate
Modified baud rate
Modified baud rate
Modified baud rate
Modified baud rate
Baud Rate
- (Automatic baud rate adjustment)
OK: Echo back data (5AH)
Error: Nothing transmitted
-
OK: Echo back data
Error: A1H × 3, A3H × 3, 62H × 3 (Note 1)
-
OK: Echo back data (90H)
Error: A1H × 3, A3H × 3, 63H × 3 (Note 1)
OK: SUM (Upper byte) (Note 2)
Error: Nothing transmitted
OK: SUM (Lower byte) (Note 2)
Error: Nothing transmitted
-
Transfer Data from TMP88F846UG to
External Controller
TMP88F846UG