167 / 224 page
Rev. 1.6
167
C8051F310/1/2/3/4/5/6/7
Table 15.3. Timer Settings for Standard Baud Rates Using an External 22.1184 MHz
Oscillator
Frequency: 22.1184 MHz
Target
Baud Rate
(bps)
Baud Rate
% Error
Oscilla-
tor Divide
Factor
Timer Clock
Source
SCA1-SCA0
(pre-scale
select)*
T1M*
Timer 1
Reload Value
(hex)
230400
0.00%
96
SYSCLK
XX
1
0xD0
115200
0.00%
192
SYSCLK
XX
1
0xA0
57600
0.00%
384
SYSCLK
XX
1
0x40
28800
0.00%
768
SYSCLK / 12
00
0
0xE0
14400
0.00%
1536
SYSCLK / 12
00
0
0xC0
9600
0.00%
2304
SYSCLK / 12
00
0
0xA0
2400
0.00%
9216
SYSCLK / 48
10
0
0xA0
1200
0.00%
18432
SYSCLK / 48
10
0
0x40
230400
0.00%
96
EXTCLK / 8
11
0
0xFA
115200
0.00%
192
EXTCLK / 8
11
0
0xF4
57600
0.00%
384
EXTCLK / 8
11
0
0xE8
28800
0.00%
768
EXTCLK / 8
11
0
0xD0
14400
0.00%
1536
EXTCLK / 8
11
0
0xA0
9600
0.00%
2304
EXTCLK / 8
11
0
0x70
X = Don’t care
*Note: SCA1–SCA0 and T1M bit definitions can be found in
Section 17.1.
Table 15.4. Timer Settings for Standard Baud Rates Using an External 18.432 MHz
Oscillator
Frequency: 18.432 MHz
Target
Baud Rate
(bps)
Baud Rate
% Error
Oscilla-
tor Divide
Factor
Timer Clock
Source
SCA1-SCA0
(pre-scale
select)*
T1M*
Timer 1
Reload
Value (hex)
230400
0.00%
80
SYSCLK
XX
1
0xD8
115200
0.00%
160
SYSCLK
XX
1
0xB0
57600
0.00%
320
SYSCLK
XX
1
0x60
28800
0.00%
640
SYSCLK / 4
01
0
0xB0
14400
0.00%
1280
SYSCLK / 4
01
0
0x60
9600
0.00%
1920
SYSCLK / 12
00
0
0xB0
2400
0.00%
7680
SYSCLK / 48
10
0
0xB0
1200
0.00%
15360
SYSCLK / 48
10
0
0x60
230400
0.00%
80
EXTCLK / 8
11
0
0xFB
115200
0.00%
160
EXTCLK / 8
11
0
0xF6
57600
0.00%
320
EXTCLK / 8
11
0
0xEC
28800
0.00%
640
EXTCLK / 8
11
0
0xD8
14400
0.00%
1280
EXTCLK / 8
11
0
0xB0
9600
0.00%
1920
EXTCLK / 8
11
0
0x88
X = Don’t care
*Note: SCA1–SCA0 and T1M bit definitions can be found in
Section 17.1.
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
