參數(shù)資料
型號(hào): C8051F230R
廠商: Silicon Laboratories Inc
文件頁數(shù): 39/146頁
文件大?。?/td> 0K
描述: IC 8051 MCU 8K FLASH 48TQFP
標(biāo)準(zhǔn)包裝: 1
系列: C8051F2xx
核心處理器: 8051
芯體尺寸: 8-位
速度: 25MHz
連通性: SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.6 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 48-TQFP
包裝: 剪切帶 (CT)
其它名稱: 336-1011-1
C8051F2xx
Rev. 1.6
133
17.2. Timer 2
Timer 2 is a 16-bit counter/timer formed by the two 8-bit SFR's: 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 speci-
fied 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 config-
uring external I/O pins.) Timer 2 can also be used to start an ADC Data Conversion (see section 5).
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
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