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參數(shù)資料
| 型號(hào)： | PIC30F2010 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | dsPIC High-Performance 16-bit Digital Signal Controller Family Overview |
| 中文描述： | dsPIC數(shù)字信號(hào)的高性能16位數(shù)字信號(hào)控制器系列簡(jiǎn)介 |
| 文件頁數(shù)： | 24/34頁 |
| 文件大小： | 500K |
| 代理商： | PIC30F2010 |
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dsPIC30F
DS70025D-page 24
Advance Information
2001 Microchip Technology Inc.
6.6
Input Capture Module
This is a description of the Input Capture module and
associated operational modes. Input Capture modules
are useful in applications requiring Frequency (Period)
and Pulse measurement.
6.6.1
OVERVIEW
Input capture is useful for such modes as:
Frequency/Period/Pulse Measurements
Additional sources of external interrupts
Table 6-1 presents the timer resource allocation for the
input capture module.
TABLE 6-1:
SUGGESTED TIMER
RESOURCE
6.6.2
INPUT CAPTURE MODULE
OPERATIONS
The Input Capture module consists of four input cap-
ture channels. The key operational features are:
Simple capture event mode
Timer2 and Timer3 mode selection
Input Capture during sleep mode
Interrupt on input capture event
These operating modes are determined by setting the
appropriate control and configuration bits. Figure 6-6
depicts the Input Capture mode block diagram.
FIGURE 6-6:
INPUT CAPTURE MODE BLOCK DIAGRAM
6.6.3
SIMPLE CAPTURE EVENT MODE
The simple capture events are as follows:
Capture every falling edge
Capture every rising edge
Capture every 4th rising edge
Capture every 16th rising edge
These simple input capture modes are configured by
setting the appropriate control and configuration bits.
Functional Mode
Timer Resource
Input Capture
Timer 2 and Timer 3
CAPxBUF x 16
Prescaler - 1, 4, 16
and Mode Select
ICx
Pin
CAPxM2:CAPxM0
Mode Select
3
Note 1:
Where
‘
x
’
is shown reference is made to the registers or bits associated to the respective input
capture channels 1 through N.
1
0
Set Flag
CAPxIF
CAPxTMR
Timer2<15:0>
Timer3<15:0>
From GP Timer Module
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