参数资料
型号: C8051F002R
厂商: Silicon Laboratories Inc
文件页数: 53/171页
文件大小: 0K
描述: IC 8051 MCU 32K FLASH 32LQFP
标准包装: 1
系列: C8051F00x
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
连通性: SMBus(2 线/I²C),SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,温度传感器,WDT
输入/输出数: 8
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
数据转换器: A/D 4x12b; D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 32-LQFP
包装: 剪切带 (CT)
其它名称: 336-1002-1
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
19.2.
Timer 2
Timer 2 is a 16-bit counter/timer formed by the two 8-bit SFRs: TL2 (low byte) and TH2 (high byte). As with
Timers 0 and 1, Timer 2 can use either the system clock or transitions on an external input pin as its clock source.
The Counter/Timer Select bit C/T2 bit (T2CON.1) selects the clock source for Timer 2. Clearing C/T2 selects the
system clock as the input for the timer (divided by either one or twelve as specified by the Timer Clock Select bit
T2M in CKCON). When C/T2 is set to 1, high-to-low transitions at the T2 input pin increment the counter/timer
register. (Refer to Section 14 for information on selecting and configuring external I/O pins.) Timer 2 can also be
used to start an ADC Data Conversion.
Timer 2 offers capabilities not found in Timer 0 and Timer 1.
It operates in one of three modes: 16-bit
Counter/Timer with Capture, 16-bit Counter/Timer with Auto-Reload or Baud Rate Generator Mode. Timer 2’s
operating mode is selected by setting configuration bits in the Timer 2 Control (T2CON) register. Below is a
summary of the Timer 2 operating modes and the T2CON bits used to configure the counter/timer. Detailed
descriptions of each mode follow.
RCLK
TCLK
CP/RL2
TR2
Mode
0
1
16-bit Counter/Timer with Capture
0
1
16-bit Counter/Timer with Auto-Reload
0
1
X
1
Baud Rate Generator for TX
1
0
X
1
Baud Rate Generator for RX
1
X
1
Baud Rate Generator for TX and RX
X
0
Off
Rev. 1.7
146
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