Silicon Laboratories Stepper Machine Especificações Página 153

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C8051F330/1
Rev. 1.1 153
Tabl e 16.3. Timer Settings for Standard Baud Rates Using an External Oscillator
Frequency: 22.1184 MHz
Target
Baud Rate
(bps)
Baud Rate
% Error
Oscillator
Divide
Factor
Timer Clock
Source
SCA1-SCA0
(pre-scale select)
T1M
Timer 1
Reload
Value (hex )
SYSCLK from
External Osc.
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
SYSCLK from
Internal Osc.
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
SCA1-SCA0 and T1M bit definitions can be found in Section 18.1.
Tabl e 16.4. Timer Settings for Standard Baud Rates Using an External Oscillator
Frequency: 18.432 MHz
Target
Baud Rate
(bps)
Baud Rate
% Error
Oscillator
Divide
Factor
Timer Clock
Source
SCA1-SCA0
(pre-scale select)
T1M
Timer 1
Reload
Value (hex )
SYSCLK from
External Osc.
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
SYSCLK from
Internal Osc.
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
SCA1-SCA0 and T1M bit definitions can be found in Section 18.1.
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