TMPM330 - Keil

Under development
• Baud rate calculation for an external clock input:
1) UART mode
TMPM330 (rev 0.4) 9-12
TMPM330
Baud Rate = external clock input / 16
In this, the period of the external clock input must be equal to or greater than 2/fsys.
If fsys = 32 MHz, the highest baud rate will be 32÷2÷16=1.0 (Mbps).
2) I/O interface mode
Baud Rate = external clock input
When double buffering is used, it is necessary to satisfy the following relationship:
External clock input period > 6/fsys
Therefore, when fsys = 32 MHz, the baud rate must be set to a rate lower than
32÷6=5.33 (Mbps).
When double buffering is not used, it is necessary to satisfy the following relationship:
External clock input period > 8/fsys
Therefore, when fsys = 32 MHz, the baud rate must be set to a rate lower than
32÷8=4.0 (Mbps).
The baud rate examples for the UART mode are shown in Table 9-4 and Table 9-5.
Serial Channel (SIO)