参数资料
型号: C8051F018
厂商: Silicon Laboratories Inc
文件页数: 39/154页
文件大小: 0K
描述: IC 8051 MCU 16K FLASH 64TQFP
标准包装: 160
系列: C8051F018
核心处理器: 8051
芯体尺寸: 8-位
速度: 25MHz
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: 32
程序存储器容量: 16KB(16K x 8)
程序存储器类型: 闪存
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.8 V ~ 3.6 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-TQFP
包装: 托盘
C8051F018
C8051F019
Figure 17.14. T2CON: Timer 2 Control Register
R/W
Reset Value
TF2
EXF2
RCLK
TCLK
EXEN2
TR2
C/T2
CP/RL2
00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
SFR Address:
(bit addressable)
0xC8
Bit7:
TF2: Timer 2 Overflow Flag.
Set by hardware when Timer 2 overflows from 0xFFFF to 0x0000 or reload value. When
the Timer 2 interrupt is enabled, setting this bit causes the CPU to vector to the Timer 2
interrupt service routine. This bit is not automatically cleared by hardware and must be
cleared by software. TF2 will not be set when RCLK and/or TCLK are logic 1.
Bit6:
EXF2: Timer 2 External Flag.
Set by hardware when either a capture or reload is caused by a high-to-low transition on
the T2EX input pin and EXEN2 is logic 1. When the Timer 2 interrupt is enabled, setting
this bit causes the CPU to vector to the Timer 2 Interrupt service routine. This bit is not
automatically cleared by hardware and must be cleared by software.
Bit5:
RCLK: Receive Clock Flag.
Selects which timer is used for the UART’s receive clock in modes 1 or 3.
0: Timer 1 overflows used for receive clock.
1: Timer 2 overflows used for receive clock.
Bit4:
TCLK: Transmit Clock Flag.
Selects which timer is used for the UART’s transmit clock in modes 1 or 3.
0: Timer 1 overflows used for transmit clock.
1: Timer 2 overflows used for transmit clock.
Bit3:
EXEN2: Timer 2 External Enable.
Enables high-to-low transitions on T2EX to trigger captures or reloads when Timer 2 is not
operating in Baud Rate Generator mode.
0: High-to-low transitions on T2EX ignored.
1: High-to-low transitions on T2EX cause a capture or reload.
Bit2:
TR2: Timer 2 Run Control.
This bit enables/disables Timer 2.
0: Timer 2 disabled.
1: Timer 2 enabled.
Bit1:
C/T2: Counter/Timer Select.
0: Timer Function: Timer 2 incremented by clock defined by T2M (CKCON.5).
1: Counter Function: Timer 2 incremented by high-to-low transitions on external input pin
(T2).
Bit0:
CP/RL2: Capture/Reload Select.
This bit selects whether Timer 2 functions in capture or auto-reload mode. EXEN2 must
be logic 1 for high-to-low transitions on T2EX to be recognized and used to trigger
captures or reloads. If RCLK or TCLK is set, this bit is ignored and Timer 2 will function
in auto-reload mode.
0: Auto-reload on Timer 2 overflow or high-to-low transition at T2EX (EXEN2 = 1).
1: Capture on high-to-low transition at T2EX (EXEN2 = 1).
133
Rev. 1.2
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