C8051F502-IMR Silicon Laboratories Inc, C8051F502-IMR Datasheet - Page 244
C8051F502-IMR
Manufacturer Part Number
C8051F502-IMR
Description
MCU 8-Bit C8051F50x 8051 CISC 64KB Flash 2.5V/3.3V/5V 32-Pin QFN EP T/R
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F502-IM.pdf
(312 pages)
Specifications of C8051F502-IMR
Package
32QFN EP
Device Core
8051
Family Name
C8051F50x
Maximum Speed
50 MHz
Ram Size
4.25 KB
Program Memory Size
64 KB
Operating Supply Voltage
2.5|3.3|5 V
Data Bus Width
8 Bit
Program Memory Type
Flash
Number Of Programmable I/os
25
Interface Type
I2C/SPI/UART
On-chip Adc
32-chx12-bit
Operating Temperature
-40 to 125 °C
Number Of Timers
4
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C8051F50x/F51x
A quick reference for typical baud rates and clock frequencies is given in Table 24.1.
244
Target Baud
Rate (bps)
230400
115200
230400
115200
230400
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
115385
230769
115385
230769
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
Factor
Divide
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
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
0xFCBF
0xFFCC
0xFCBF
0xFFCC
0xFB1E
0xEC78
0xFD8F
0xEC78
0xFE5F
0xF97D
0xF63C
0xD8F0
0xB1E0
0xFE5F
0xD8F0
0xFFE6
0xFE5F
0xF63C
0xFF98
0xFF30
0xFF98
0xFF30
0xFF98
0xFF30
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