MC81F4332 Datasheet, PDF (157/198 Pages) Finechips – ABOV SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS

24.3 Baud rate calculations
Mode 2
The baud rate in mode 2 is fixed at the fxx clock frequency divided by 16:
Mode 2 baud rate = fxx/16
MC81F4432
Modes 0, 1 and 3
In modes 0, 1 and 3, the baud rate is determined by the UART baud rate data register, BRDAT:
Mode 0, 1 and 3 baud rate = fu/(16 × (BRDATA + 1))
Mode
Mode 2
Baud Rate
UART Clock
BRDAT
DEC
0.5 MHz
8 MHz
X
230,400 Hz
11.0592 MHz
02
115,200 Hz
11.0592 MHz
05
57,600 Hz
11.0592 MHz
11
38,400 Hz
11.0592 MHz
17
19,200 Hz
11.0592 MHz
35
9,600 Hz
11.0592 MHz
71
4,800 Hz
11.0592 MHz
143
62,500 Hz
10 MHz
09
9,615 Hz
10 MHz
64
38,461 Hz
8 MHz
12
12,500 Hz
8 MHz
39
19,230 Hz
4 MHz
12
9,615 Hz
4 MHz
25
Figure 24-5 Commonly Used Baud Rates Generated by BRDAT
HEX
X
02H
05H
0BH
11H
23H
47H
8FH
09H
40H
0CH
27H
0CH
19H
October 19, 2009 Ver.1.35
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