C8051F017R Silicon Laboratories Inc, C8051F017R Datasheet - Page 147

• Manufacturer Part Number: C8051F017R
• Description: IC 8051 MCU 32K FLASH 32LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F01xr

Specifications of C8051F017R

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 8
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 4x10b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1042-2; Q1057388

19.2.1. Mode 0: 16-bit Counter/Timer with Capture
In this mode, Timer 2 operates as a 16-bit counter/timer with capture facility. A high-to-low transition on the T2EX
input pin causes the 16-bit value in Timer 2 (TH2, TL2) to be loaded into the capture registers (RCAP2H,
RCAP2L).
Timer 2 can use either SYSCLK, SYSCLK divided by 12, or high-to-low transitions on the external T2 pin as its
clock source when operating in Counter/Timer with Capture mode. Clearing the C/T2 bit (T2CON.1) selects the
system clock as the input for the timer (divided by one or twelve as specified by the Timer Clock Select bit T2M in
CKCON). When C/T2 is set to logic 1, a high-to-low transition at the T2 input pin increments the counter/timer
register. As the 16-bit counter/timer register increments and overflows from 0xFFFF to 0x0000, the TF2 timer
overflow flag (T2CON.7) is set and an interrupt will occur if the interrupt is enabled.
Counter/Timer with Capture mode is selected by setting the Capture/Reload Select bit CP/RL2 (T2CON.0) and the
Timer 2 Run Control bit TR2 (T2CON.2) to logic 1. The Timer 2 External Enable EXEN2 (T2CON.3) must also be
set to logic 1 to enable a capture. If EXEN2 is cleared, transitions on T2EX will be ignored.
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C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
SYSCLK
T2EX
T2
Crossbar
Crossbar
EXEN2
12
TR2
0
1
Figure 19.11. T2 Mode 0 Block Diagram
0
1
CKCON
M
T
2
Capture
Rev. 1.7
M
T
1
TCLK
M
T
0
RCAP2L
TL2
RCAP2H
TH2
CP/RL2
EXEN2
TCLK
RCLK
EXF2
C/T2
TR2
TF2
Interrupt