C8051F581-IMR Silicon Labs, C8051F581-IMR Datasheet - Page 255

• Manufacturer Part Number: C8051F581-IMR
• Description: 8-bit Microcontrollers - MCU 50MIPS 128kB 8kB SPI
• Manufacturer: Silicon Labs

Specifications of C8051F581-IMR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

A quick reference for typical baud rates and clock frequencies is given in Table 24.1.
Target Baud
Rate (bps)
230400
230400
230400
115200
115200
115200
57600
28800
14400
57600
28800
14400
57600
28800
14400
9600
2400
1200
9600
2400
1200
9600
2400
1200
Table 24.1. Baud Rate Generator Settings for Standard Baud Rates
Actual Baud
Baud Rate
Rate (bps)
230769
230769
230769
115385
115385
115385
57554
28812
14397
57692
28777
14406
57692
28846
14388
9600
2400
1200
9600
2400
1200
9600
2400
1200
Equation 24.1. UART0 Baud Rate
=
------------------------------------------------------------------------------

65536 (SBRLH0:SBRLL0)
Baud Rate
0.16%
0.16%
0.08%
0.04%
0.02%
0.00%
0.00%
0.00%
0.16%
0.16%
0.16%
0.08%
0.04%
0.00%
0.00%
0.00%
0.16%
0.16%
0.16%
0.16%
0.08%
0.00%
0.00%
0.00%
Error
–
SYSCLK
Rev. 1.2
Oscillator
Divide
Factor
20000
40000
10000
20000
10000
1666
3334
5000
1666
2500
1250
5000
208
416
834
104
208
416
834
104
208
416
834
52

(Prescaler Bits)
x
SB0PS[1:0]
1
-- -
2
C8051F58x/F59x
x
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
11
------------------------ -
Prescaler
1
SBRLH0:SBRLL0
Reload Value in
0xFFCC
0xFFCC
0xFCBF
0xFCBF
0xFB1E
0xEC78
0xFD8F
0xEC78
0xFE5F
0xF97D
0xF63C
0xD8F0
0xB1E0
0xFE5F
0xD8F0
0xFFE6
0xFE5F
0xF63C
0xFF98
0xFF30
0xFF98
0xFF30
0xFF98
0xFF30
255