参数资料
型号: SAK-C509-LM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PQFP100
封装: PLASTIC, MQFP-100
文件页数: 36/74页
文件大小: 1607K
代理商: SAK-C509-LM
C509-L
Semiconductor Group
40
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 by a count rate of
f
OSC/6 up to fOSC/32.
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 17 illustrates the
input clock logic of timer 0/1.
Figure 17
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
external (max)
0
8-bit timer/counter with a
divide-by-32 prescaler
00
f
OSC/6x32 up to
f
OSC/48x32
f
OSC/12x32
1
16-bit timer/counter
0
1
f
OSC/6 up to fOSC/
48
f
OSC/12
2
8-bit timer/counter with
8-bit autoreload
10
3
Timer/counter 0 used as one
8-bit timer/counter and one
8-bit timer
Timer 1 stops
11
TxP1
TxP0
Prescaler
00
6
01
12
10
24
11
48
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