C8051F336_08 Datasheet, PDF (166/227 Pages) Silicon Laboratories – Mixed-Signal Byte-Programmable EPROM MCU

C8051F336/7/8/9
Table 22.1. Timer Settings for Standard Baud Rates
Using The Internal 24.5 MHz Oscillator
Frequency: 24.5 MHz
Target
Baud Rate
(bps)
230400
115200
Baud Rate Oscillator Timer Clock
% Error Divide
Source
Factor
–0.32%
106
SYSCLK
–0.32%
212
SYSCLK
SCA1–SCA0
(pre-scale
select)¹
XX²
XX
57600
0.15%
426
SYSCLK
XX
28800
–0.32%
848
SYSCLK/4
01
14400
0.15%
1704 SYSCLK/12
00
9600
–0.32%
2544 SYSCLK/12
00
2400
–0.32%
10176 SYSCLK/48
10
1200
0.15%
20448 SYSCLK/48
10
Notes:
1. SCA1–SCA0 and T1M bit definitions can be found in Section 24.1.
2. X = Don’t care.
T1M^{1 Timer 1}
Reload
Value (hex)
1
0xCB
1
0x96
1
0x2B
0
0x96
0
0xB9
0
0x96
0
0x96
0
0x2B
Table 22.2. Timer Settings for Standard Baud Rates
Using an External 22.1184 MHz Oscillator
Frequency: 22.1184 MHz
Target
Baud Rate
(bps)
230400
Baud Rate Oscillator Timer Clock
% Error Divide
Source
Factor
0.00%
96
SYSCLK
SCA1–SCA0
(pre-scale
select)¹
XX²
115200
0.00%
192
SYSCLK
XX
57600
0.00%
384
SYSCLK
XX
28800
0.00%
768 SYSCLK / 12
00
14400
0.00%
1536 SYSCLK / 12
00
9600
0.00%
2304 SYSCLK / 12
00
2400
0.00%
9216 SYSCLK / 48
10
1200
0.00%
18432 SYSCLK / 48
10
230400
0.00%
96
EXTCLK / 8
11
115200
0.00%
192 EXTCLK / 8
11
57600
0.00%
384 EXTCLK / 8
11
28800
0.00%
768 EXTCLK / 8
11
14400
0.00%
1536 EXTCLK / 8
11
9600
0.00%
2304 EXTCLK / 8
11
Notes:
1. SCA1–SCA0 and T1M bit definitions can be found in Section 24.1.
2. X = Don’t care.
T1M^{1 Timer 1}
Reload
Value (hex)
1
0xD0
1
0xA0
1
0x40
0
0xE0
0
0xC0
0
0xA0
0
0xA0
0
0x40
0
0xFA
0
0xF4
0
0xE8
0
0xD0
0
0xA0
0
0x70
166
Rev.1.0