參數(shù)資料
型號: SAK-C505L
廠商: INFINEON TECHNOLOGIES AG
元件分類: 8位微控制器
英文描述: 8-bit CMOS Microcontroller
中文描述: 8位CMOS微控制器
文件頁數(shù): 31/85頁
文件大?。?/td> 487K
代理商: SAK-C505L
C505L
Data Sheet
29
06.99
Timer / Counter 0 and 1
Timer/Counter 0 and 1 can be used in four operating modes as listed in
Table 6
:
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 6
Timer/Counter 0 and 1 Operating Modes
Mode
Description
TMOD
Input Clock
M1
M0
internal
f
OSC
/(6
×
32)
external (max)
f
OSC
/(12
×
32)
0
8-bit timer/counter with a divide-by-32
prescaler
0
0
1
16-bit timer/counter
0
1
f
OSC
/6
f
OSC
/12
2
8-bit timer/counter with 8-bit autoreload
1
0
3
Timer/counter 0 used as one
8-bit timer/counter and one 8-bit timer
Timer 1 stops
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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