参数资料
型号: PIC16C711-20E/P
厂商: Microchip Technology
文件页数: 27/177页
文件大小: 0K
描述: IC MCU OTP 1KX14 A/D 18DIP
产品培训模块: Asynchronous Stimulus
标准包装: 25
系列: PIC® 16C
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 13
程序存储器容量: 1.75KB(1K x 14)
程序存储器类型: OTP
RAM 容量: 68 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
数据转换器: A/D 4x8b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 18-DIP(0.300",7.62mm)
包装: 管件
122
7593L–AVR–09/12
AT90USB64/128
The Timer/Counter Overflow Flag (TOVn) is set according to the mode of operation selected by
the WGMn3:0 bits. TOVn can be used for generating a CPU interrupt.
15.5
Input Capture unit
The Timer/Counter incorporates an Input Capture unit that can capture external events and give
them a time-stamp indicating time of occurrence. The external signal indicating an event, or mul-
tiple events, can be applied via the ICPn pin or alternatively, for the Timer/Counter1 only, via the
Analog Comparator unit. The time-stamps can then be used to calculate frequency, duty-cycle,
and other features of the signal applied. Alternatively the time-stamps can be used for creating a
log of the events.
The Input Capture unit is illustrated by the block diagram shown in Figure 15-3. The elements of
the block diagram that are not directly a part of the input capture unit are gray shaded. The small
“n” in register and bit names indicates the Timer/Counter number.
Figure 15-3. Input Capture Unit block diagram.
Note:
The Analog Comparator Output (ACO) can only trigger the Timer/Counter1 ICP – not
Timer/Counter3, 4, or 5.
When a change of the logic level (an event) occurs on the Input Capture Pin (ICPn), alternatively
on the analog Comparator output (ACO), and this change confirms to the setting of the edge
detector, a capture will be triggered. When a capture is triggered, the 16-bit value of the counter
(TCNTn) is written to the Input Capture Register (ICRn). The Input Capture Flag (ICFn) is set at
the same system clock as the TCNTn value is copied into ICRn Register. If enabled (TICIEn =
1), the input capture flag generates an input capture interrupt. The ICFn flag is automatically
cleared when the interrupt is executed. Alternatively the ICFn flag can be cleared by software by
writing a logical one to its I/O bit location.
ICFn (int.req.)
Analog
comparator
WRITE
ICRn (16-bit register)
ICRnH (8-bit)
Noise
canceler
ICPn
Edge
detector
TEMP (8-bit)
DATA BUS (8-bit)
ICRnL (8-bit)
TCNTn (16-bit counter)
TCNTnH (8-bit)
TCNTnL (8-bit)
ACIC*
ICNC
ICES
ACO*
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