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參數(shù)資料
型號: HT86XXX
廠商: Holtek Semiconductor Inc.
英文描述: 8-Bit Voice Synthesizer MCU
中文描述: 8位微控制器語音合成器
文件頁數(shù): 21/28頁
文件大小: 195K
代理商: HT86XXX
HT86XXX
Rev. 1.00
21
November 1, 2002
Timer Counter 3 (RTC time base)
The timer counter TMR3 is an 8-bit programmable
count-up counter. Its counting is as the same manner as
Timer Event Counter 0/1 and Timer Counter 2, but the
clock source of TMR3 can be from internal instruction
cycle (T1) or external 32kHz crystal which is connected
to PC6 and PC7. The TMR3 s clock source is deter-
mined by mask option. If the 32kHz crystal is enabled,
then TMR3 s clock source is 32kHz which is from PC6
and PC7. If the 32kHz crystal is disabled, then TMR3 s
clock source is internal T1.
The TMR3 is internal clock source only, i.e.
(TM1,TM0)=(1,0). There is a 3-bit prescaler
(TMR3S2,TMR3S1,TMR3S0) which defines different
division ratio of TMR3 s clock source.
Label
Bits
Function
TMR3S2,
TMR3S1,
TMR3S0
0~2
To define the operating clock source
(TMR3S2, TMR3S1, TMR3S0)
000: clock source/2
001: clock source/4
010: clock source/8
011: clock source/16
100: clock source/32
101: clock source/64
110: clock source/128
111: clock source/256
TE
3
To define the TMR3 active edge of
timer/event counter
(0=active on low to high;
1=active on high to low)
TON
4
To enable/disable timer counting
(0=disabled; 1=enabled)
5
Unused bit, read as 0
TM0,
TM1
6
7
To define the operating mode
(TM1, TM0)
01=Eventcountmode(externalclock)
10=Timer mode (internal clock)
11=Pulse width measurement mode
00=Unused
TMR3 register
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Timer Counter 2
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Timer Counter 3
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