TMPM330 - Keil

fc [MHz]
Under development
Table 9-4 Selection of UART Baud Rate
(Using the baud rate generator with SC0BRCR = 0)
Input clock
Divide ratio N
(Set to SC0BRCR )
φT1
(fc/4)
TMPM330 (rev 0.4) 9-13
φT4
(fc/16)
φT16
(fc/64)
TMPM330
φT64
(fc/256)
9.830400 2 76.800 19.200 4.800 1.200
↑ 4 38.400 9.600 2.400 0.600
↑ 8 19.200 4.800 1.200 0.300
↑ 0 9.600 2.400 0.600 0.150
(Note) This table shows the case where the system clock is set to fc, the clock gear is set to fc/1,
and the prescaler clock is set to fperiph/2.
Table 9-5 Selection of UART Baud Rate
(The TMRB9 timer output (internal TB9OUT) is used with the timer input clock set to φT0.)
TB0RG
fc
32
MHz
9.8304
MHz
8
MHz
1H 250 76.8 62.5
2H 125 38.4 31.25
3H 25.6
4H 62.5 19.2 15.625
5H 50 15.36 12.5
6H 12.8
8H 31.25 9.6
AH 25 7.68 6.25
10H 15.625 4.8
Baud rate calculation to use the TMRB9 timer:
Transfer rate =
Unit: (Kbbs)
14H 12.5 3.84 3.125
Clock frequency selected by SYSCR0
TB0RG×2×16
Unit: (kbps)
(When input clock to the timer TMRB9 is φT0)
(Note 1) In the I/O interface mode, the TMRB9 timer output signal cannot be used internally
as the transfer clock.
(Note 2) This table shows the case where the system clock is set to fc, the clock gear is set
to fc, and the prescaler clock is set to fperiph/4.
Serial Channel (SIO)