Silicon Laboratories C8051T620 Manual page 222

C8051T620/1/6/7 & C8051T320/1/2/3
Table 25.1. Timer Settings for Standard Baud Rates
Target Baud Rate
Baud Rate
(bps)
230400
115200
57600
28800
14400
9600
2400
1200
Notes:
–
1. SCA1 SCA0 and T1M bit definitions can be found in
2. X = Don't care.
Table 25.2. Timer Settings for Standard Baud Rates
Target Baud Rate
Baud Rate
(bps)
230400
115200
57600
28800
14400
9600
2400
1200
230400
115200
57600
28800
14400
9600
Notes:
–
1. SCA1 SCA0 and T1M bit definitions can be found in
2. X = Don't care.
222
Using The Internal 24.5 MHz Oscillator
Frequency: 24.5 MHz
Oscillator Timer Clock
% Error Divide
Factor
–0.32% 106
–0.32% 212
0.15% 426
–0.32% 848
0.15% 1704
–0.32% 2544
–0.32% 10176
0.15% 20448
Using an External 22.1184 MHz Oscillator
Frequency: 22.1184 MHz
Oscillator Timer Clock
% Error Divide
Factor
0.00% 96
0.00% 192
0.00% 384
0.00% 768 SYSCLK / 12
0.00% 1536 SYSCLK / 12
0.00% 2304 SYSCLK / 12
0.00% 9216 SYSCLK / 48
0.00% 18432 SYSCLK / 48
0.00% 96
0.00% 192
0.00% 384
0.00% 768
0.00% 1536
0.00% 2304
Rev. 1.2
SCA1–SCA0
Source
(pre-scale
select)
2
SYSCLK XX
SYSCLK XX
SYSCLK XX
SYSCLK/4 01
SYSCLK/12 00
SYSCLK/12 00
SYSCLK/48 10
SYSCLK/48 10
Section 28.1
.
SCA1–SCA0
Source
(pre-scale
select)
2
SYSCLK XX
SYSCLK XX
SYSCLK XX
00
00
00
10
10
EXTCLK / 8 11
EXTCLK / 8 11
EXTCLK / 8 11
EXTCLK / 8 11
EXTCLK / 8 11
EXTCLK / 8 11
Section 28.1
.
1 Timer 1
T1M
Reload
Value (hex)
1
1 0xCB
1 0x96
1 0x2B
0 0x96
0 0xB9
0 0x96
0 0x96
0 0x2B
1 Timer 1
T1M
Reload
Value (hex)
1
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