參數(shù)資料
型號: DMC73C168
英文描述: 8Bit Single Chip Microcontroller
中文描述: 8位單芯片微控制器
文件頁數(shù): 43/90頁
文件大小: 742K
代理商: DMC73C168
43
8Bit Single Chip Microcontroller
DMC73C167
Bit 7
START. Timer 2 Start/stop Control
0 = Stops Timer 2.
1 = Starts Timer 2.
Table 5-24. P26 011Ah T3DATA Timer 3 Data
Bit
R
7
6
5
4
3
2
1
0
8-bit Timer Decrementer Value
W
8-bit Timer Reload Register
Table 5-25. P27 011Bh T3CTL1 Timer 3 Control
Bit
R
7
6
5
4
3
2
1
0
Capture Latch Value
W
START
T3SRC
Not Used
Prescaler Reload
Read : Provides the value of the capture register which contains the latched value
of the decrementer register when INT3_0 was most recently activated.
Write : Timer 3 control as below.
Bits 0, 1
Rescaler Road. Reload the 2-bit Prescaler Reload Register.
Bits 2-5
Not used.
Bit 6
T3SRC. Select Timer 3 Clock Source.
0 = Internal clock (Fosc/4).
1 = Timer 2 underflow (Cascade mode)
Bit 7
START. Timer 3 Start/stop Control
0 = Stops Timer 3.
1 = Starts Timer 3.
5.5.2.2 Real-Time Clock (RTC)
In real-time clock mode, the internal Fosc/4 is the decrementer clock source. Each positive
pulse transition of the Fosc/4 period signal decrements the counter chain.
5.5.2.3 Event Counter (EC)
When Timer 2 is in event counter mode, port A2 (ECI2) is the decrementer clock source for
Timer 2. The maximum clock frequency on A2 in event counter mode must not be greater
than Fosc/4. The minimum pulse duration must not be less than 2/Fosc. Each positive pulse
transition decrements the counter chain. It is not possible for Timer 3 to be in event counter
mode.
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