C8051F125 Silicon Laboratories Inc, C8051F125 Datasheet - Page 290
C8051F125
Manufacturer Part Number
C8051F125
Description
IC 8051 MCU 128K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F12xr
Specifications of C8051F125
Core Processor
8051
Core Size
8-Bit
Speed
50MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
32
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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C8051F120/1/2/3/4/5/6/7
C8051F130/1/2/3
The Timer 1 overflow rate is determined by the Timer 1 clock source (T1CLK) and reload value (TH1). The
frequency of T1CLK is selected as described in
Timer 1 overflow rate is calculated as shown in Equation 21.2.
When Timers 2, 3, or 4 are selected as a baud rate source, the baud rate is generated as shown in
Equation 21.3.
The overflow rate for Timer 2, 3, or 4 is determined by the clock source for the timer (TnCLK) and the 16-
bit reload value stored in the RCAPn register (n = 2, 3, or 4), as shown in Equation 21.4.
290
Equation 21.3. Mode 1 Baud Rate using Timer 2, 3, or 4
Timer234_OverflowRate
Mode1_BaudRate
Equation 21.4. Timer 2, 3, or 4 Overflow Rate
Timer1_OverflowRate
Equation 21.2. Timer 1 Overflow Rate
=
1 16
Section “23.1. Timer 0 and Timer 1” on page 309
Rev. 1.4
=
=
TnCLK
T1CLK
Timer234_OverflowRate
65536 RCAPn
256 TH1
–
–
. The
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