參數(shù)資料
型號: C515C
廠商: INFINEON TECHNOLOGIES AG
元件分類: 8位微控制器
英文描述: 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
中文描述: 8位微控制器與2/4/8K字節(jié)在系統(tǒng)可編程閃存
文件頁數(shù): 38/96頁
文件大?。?/td> 1285K
代理商: C515C
C515C
Data Sheet
34
2003-02
Timer / Counter 0 and 1
Timer / Counter 0 and 1 can be used in four operating modes as listed in
Table 7
:
In the “timer” function (C/
T
= ‘0’) the register is incremented every machine cycle.
Therefore the count rate is
f
OSC
/6.
In the “counter” function the register is incremented in response to a 1-to-0 transition at
its corresponding external input pin (P3.4/T0, P3.5/T1). Since it takes two machine
cycles to detect a falling edge the max. count rate is
f
OSC
/12. External inputs
INT0
and
INT1
(P3.2, P3.3) can be programmed to function as a gate to facilitate pulse width
measurements.
Figure 11
illustrates the input clock logic.
Figure 11
Timer/Counter 0 and 1 Input Clock Logic
Table 7
Mode
Timer/Counter 0 and 1 Operating Modes
Description
TMOD
M1
0
Timer/Counter Input Clock
internal
f
OSC
/6
×
32
M0
0
external (max)
f
OSC
/12
×
32
0
8-bit timer/counter with a
divide-by-32 prescaler
16-bit timer/counter
8-bit timer/counter with 8-bit
autoreload
Timer/counter 0 used as
one 8-bit timer/counter and
one 8-bit timer / Timer 1
stops
1
2
0
1
1
0
f
OSC
/6
f
OSC
/12
3
1
1
MCS03117
1
&
OSC
C/T = 0
C/T = 1
Control
=1
6
TR1
P3.5/T1
(TMOD)
P3.2/INT0
P3.3/INT1
f
Timer 0/1
Input Clock
OSC
/6
P3.4/T0
TR0
Gate
÷
_
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