参数资料
型号: PIC16F716-E/SO
厂商: Microchip Technology
文件页数: 83/136页
文件大小: 0K
描述: IC PIC MCU FLASH 2KX14 18SOIC
产品培训模块: Asynchronous Stimulus
标准包装: 42
系列: PIC® 16F
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,PWM,WDT
输入/输出数: 13
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 18-SOIC(0.295",7.50mm 宽)
包装: 管件
配用: I3-DB16F716-ND - BOARD DAUGHTER ICEPIC3
AC162054-ND - HEADER INTERFACE ICD2 16F716
PIC16F716
DS41206B-page 48
2007 Microchip Technology Inc.
8.1
Capture Mode
In Capture mode, CCPR1H:CCPR1L captures the
16-bit value of the TMR1 register when an event occurs
on pin CCP1. An event is defined as one of the
following and is configured by the CCP1M<3:0> bits of
the CCP1CON register:
Every falling edge
Every rising edge
Every 4th rising edge
Every 16th rising edge
When a capture is made, the Interrupt Request Flag bit
CCP1IF of the PIR1 register is set. The interrupt flag
must be cleared in software. If another capture occurs
before the value in the CCPR1H, CCPR1L register pair
is read, the old captured value is overwritten by the new
captured value (see Figure 8-1).
8.1.1
CCP1 PIN CONFIGURATION
In Capture mode, the CCP1 pin should be configured
as an input by setting the associated TRIS control bit.
FIGURE 8-1:
CAPTURE MODE
OPERATION BLOCK
DIAGRAM
8.1.2
TIMER1 MODE SELECTION
Timer1 must be running in Timer mode or Synchronized
Counter mode for the CCP module to use the capture
feature. In Asynchronous Counter mode, the capture
operation may not work.
8.1.3
SOFTWARE INTERRUPT
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCP1IE interrupt enable bit of the PIE1 register clear to
avoid false interrupts. Additionally, the user should
clear the CCP1IF interrupt flag bit of the PIR1 register
following any change in operating mode.
8.1.4
CCP PRESCALER
There are four prescaler settings specified by the
CCP1M<3:0>
bits
of
the
CCP1CON
register.
Whenever the CCP module is turned off, or the CCP
module is not in Capture mode, the prescaler counter
is cleared. Any Reset will clear the prescaler counter.
Switching from one capture prescaler to another does not
clear the prescaler and may generate a false interrupt. To
avoid this unexpected operation, turn the module off by
clearing the CCP1CON register before changing the
prescaler (see Example 8-1).
EXAMPLE 8-1:
CHANGING BETWEEN
CAPTURE PRESCALERS
Note:
If the CCP1 pin is configured as an output,
a write to the port can cause a capture
condition.
CCPR1H
CCPR1L
TMR1H
TMR1L
Set Flag bit CCP1IF
(PIR1 register)
Capture
Enable
CCP1CON<3:0>
Prescaler
÷ 1, 4, 16
and
Edge Detect
pin
CCP1
System Clock (FOSC)
BANKSEL CCP1CON
;Set Bank bits to point
;to CCP1CON
CLRF
CCP1CON
;Turn CCP module off
MOVLW
NEW_CAPT_PS ;Load the W reg with
; the new prescaler
; move value and CCP ON
MOVWF
CCP1CON
;Load CCP1CON with this
; value
相关PDF资料
PDF描述
D38999/24WJ24SN CONN RCPT 24POS JAM NUT W/SCKT
D38999/20MJ19PB CONN RCPT 19POS WALL MNT W/PINS
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