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參數(shù)資料
型號: W77E468
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8 BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 61/84頁
文件大小: 531K
代理商: W77E468
Preliminary W77E468
Publication Release Date: January 1999
- 61 - Revision A1
C/T = T2CON.1
0
T2 = P1.0
T2CON.6
TR2 = T2CON.2
T2EX = P1.1
EXEN2 = T2CON.3
EXF2
Timer 2
overflow
Timer 2
Interrupt
TH2
TL2
RCAP2H
RCAP2L
1
Clock Source
Mode input
div. by 4 osc/2
div. by 64 osc/32
div. by 1024 osc/512
Figure 17. Baud Rate Generator Mode
PROGRAMMABLE CLOCK-OUT
Timer 2 is equipped with a new clock-out feature which outputs a 50% duty cycle clock on P1.0. It can
be invoked as a programmable clock generator. To configure Timer 2 with clock-out mode, software
must initiate it by setting bit T2OE = 1, C/T2 = 0 and CP/RL = 0. Setting bit TR2 will start the timer.
This mode is similar to the baud rate generator mode, it will not generate an interrupt while Timer 2
overflow. So it is possible to use Timer 2 as a baud rate generator and a clock generator at the same
time. The clock-out frequency is determined by the following equation:
The Clock-Out Frequency = Oscillator Frequency / [4 X (RCAP2H,RCAP2L) ]
T2CON.6
TR2 = T2CON.2
T2EX = P1.1
EXEN2 = T2CON.3
EXF2
T2=P1.0
Timer 2
Interrupt
TH2
TL2
RCAP2H
RCAP2L
Clock Source
Mode input
div. by 4 osc/2
div. by 64 osc/32
div. by 1024 osc/512
1/2
Figure 18. Programmable Clock-Out Mode
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