參數(shù)資料
型號: C8051F019-GQR
廠商: Silicon Laboratories Inc
文件頁數(shù): 36/154頁
文件大?。?/td> 0K
描述: IC 8051 MCU 16K FLASH 48TQFP
產(chǎn)品培訓(xùn)模塊: Serial Communication Overview
標(biāo)準(zhǔn)包裝: 500
系列: C8051F018
核心處理器: 8051
芯體尺寸: 8-位
速度: 25MHz
連通性: SMBus(2 線/I²C),SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,溫度傳感器,WDT
輸入/輸出數(shù): 16
程序存儲(chǔ)器容量: 16KB(16K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.8 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 48-TQFP
包裝: 帶卷 (TR)
C8051F018
C8051F019
17.2.1. 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.
Figure 17.11. T2 Mode 0 Block Diagram
TL2
TH2
EXEN2
T2EX
TR2
T2
SYSCLK
12
0
1
0
Interrupt
TCLK
RCAP2L
RCAP2H
Capture
T2CO
N
RCLK
TCLK
EXF2
EXEN2
TR2
C/T2
CP/RL2
TF2
CKCON
T
2
M
T
1
M
T
0
M
Crossbar
Rev. 1.2
130
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C8051F019-GQ IC 8051 MCU 16K FLASH 48TQFP
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