参数资料
型号: ST72F60E1M1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO24
封装: 0.300 INCH, LEAD FREE, PLASTIC, SOP-24
文件页数: 90/139页
文件大小: 1993K
代理商: ST72F60E1M1
Watchdog timer (WDG)
ST7260xx
54/139
Note:
1
After reading the ICiHR register, transfer of input capture data is inhibited and ICFi will never
be set until the ICiLR register is also read.
2
The ICiR register contains the free running counter value which corresponds to the most
recent input capture.
3
The two input capture functions can be used together even if the timer also uses the two
output compare functions.
4
In One pulse mode and PWM mode only Input Capture 2 can be used.
5
The alternate inputs (ICAP1 and ICAP2) are always directly connected to the timer. So any
transitions on these pins activates the input capture function.
Moreover if one of the ICAPi pins is configured as an input and the second one as an output,
an interrupt can be generated if the user toggles the output pin and if the ICIE bit is set.
This can be avoided if the input capture function i is disabled by reading the ICiHR (see
note 1).
6
The TOF bit can be used with interrupt generation in order to measure events that go
beyond the timer range (FFFFh).
Figure 29.
Input capture block diagram
Figure 30.
Input capture timing diagram
ICIE
CC0
CC1
16-bit free running counter
IEDG1
(Control register 1) CR1
(Control register 2) CR2
ICF2
ICF1
0
(Status register) SR
IEDG2
ICAP1
ICAP2
Edge Detect
circuit 2
16-bit
IC1R register
Edge Detect
circuit 1
pin
IC2R register
FF01
FF02
FF03
Timer clock
Counter register
ICAPi pin
ICAPi flag
ICAPi register
Note: The rising edge is the active edge.
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