TMP92CZ26A

92CZ26A-51

(3) UART data transfer format
T able 3.4.6 to T able 3.4.1 1 show the supported fr equencies, data transfer format, baud
rate modification command, operation command, and version management
information, respective ly.
Please also ref er to the description of boot program op eration later in this section.
Table 3.4.6 Supported Frequencies (X1)
6.00 MHz 8.00 MHz 9.00 MHz 10.00 MHz
Note: The built-in PLL (clock multiplier) is not used regardless of the oscillation frequency.
Table 3.4.7 Transfer Format
Byte Number to
Transfer
Transfer data from PC to TMP92CZ26A Baud Rate Transfer data from TMP92CZ26A to PC
1st byte
2nd byte
Matching data (5AH)
−
− (Frequency measurement and baud
rate auto setting)
OK: Echo back data (5AH)
Error: No transfer
3rd byte
to
6th byte
− Version management information
(See Table 3.4.10)
7th byte − Frequency information
8th byte
9th byte
Baud rate modification command
(See Table 3.4.8.)
−
9600 bps
−
OK: Echo back data
Error: Error code x 3
10th byte
to
(n − 4)th byte
User program
Intel Hex format (binary)
NG: Operation stop by checksum error
(n − 3)th byte − OK: SUM (High)
(See (4)-c).)
(n − 2)th byte − OK: SUM (Low)
Boot
ROM
(n − 1)th byte
n’th byte
User program start command (C0H)
(See Table 3.4.9.)
−
New baud rate
−
OK: Echo back data (C0H)
Error: Error code x 3
RAM − Branch to user program start address
“Error code x 3” means that the error code is transmitted three times. For example, if the error code is 62H, the
TMP92CZ26A transmits 62H three times. For error codes, see (4)-b).