TMP91C824
91C824-126
Table 3.9.3 Transfer rate selection
(when baud rate generator Is used and BR0CR <BR0ADDE>
=
0)
fc [MHz]
Input Clock
Frequency Divider
φ
T0
φ
T2
φ
T8
φ
T32
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
9.830400
0
9.600
2.400
0.600
0.150
5
38.400
9.600
2.400
0.600
12.288000
A
19.200
4.800
1.200
0.300
2
115.200
3 76.800
19.200
4.800
1200
6
38.400
9.600
2.400
0.600
14.745600
C
19.200
4.800
1.200
0.300
(note1): Transfer rates in I/O Interface Mode are eight times faster than the values given above.
(note2): The values in this table are calculated for when fc is selected as the system clock, the clock gear is set
for fc/1 and the system clock is the prescaler clock input f
FPH
.
Table 3.9.4 UART baud rate selection
(When TMRA0 with input Clock
φ
T1 is used)
fc
TA0REG0
12.288
MHz
12
MHz
9.8304
MHz
8
MHz
6.144
MHz
1H 96
76.8
62.5
48
2H 48
38.4
31.25
24
3H 32
31.25
16
4H 24
19.2 12
5H 19.2 9.6
8H 12 9.6 6
AH 9.6 4.8
10H 6 4.8 3
14H 4.8 2.4
Method for calculating the transfer rate (when TMRA0 is used):
(note1): The TMRA0 match detect signal cannot be used as the transfer clock in I/O Interface Mode.
(note2): The values in this table are calculated for when fc is selected as the system clock, the clock gear is set
for fc/1 and the system clock is the prescaler clock input f
FPH
.
Unit (kbps)
Unit (kbps)
Transfer rate =
Clock frequency determined by SYSCR0<PRCK1, PRCK0>
TA0REG
×
8
×
16
(when TMRA0 (input clock
φ
T1
)
is used)