Microchip Technology MA300015 데이터 시트
© 2011 Microchip Technology Inc.
DS70150E-page 81
dsPIC30F6010A/6015
12.0
INPUT CAPTURE MODULE
This section describes the input capture module and
associated operational modes. The features provided by
this module are useful in applications requiring
frequency (period) and pulse measurement.
associated operational modes. The features provided by
this module are useful in applications requiring
frequency (period) and pulse measurement.
depicts a block diagram of the input capture module.
Input capture is useful for such modes as:
Input capture is useful for such modes as:
• Frequency/Period/Pulse Measurements
• Additional sources of External Interrupts
The key operational features of the input capture
module are:
module are:
• Simple Capture Event mode
• Timer2 and Timer3 mode selection
• Interrupt on input capture event
These operating modes are determined by setting the
appropriate bits in the ICxCON register (where
x = 1,2,...,N). The dsPIC30F6010A and dsPIC30F6015
devices have eight capture channels.
appropriate bits in the ICxCON register (where
x = 1,2,...,N). The dsPIC30F6010A and dsPIC30F6015
devices have eight capture channels.
12.1
Simple Capture Event Mode
The simple capture events in the dsPIC30F product
family are:
family are:
• Capture every falling edge
• Capture every rising edge
• Capture every 4th rising edge
• Capture every 16th rising edge
• Capture every rising and falling edge
These simple Input Capture modes are configured by
setting the appropriate bits ICM<2:0> (ICxCON<2:0>).
setting the appropriate bits ICM<2:0> (ICxCON<2:0>).
12.1.1
CAPTURE PRESCALER
There are four input capture prescaler settings, speci-
fied by bits ICM<2:0> (ICxCON<2:0>). Whenever the
capture channel is turned off, the prescaler counter will
be cleared. In addition, any Reset will clear the
prescaler counter.
fied by bits ICM<2:0> (ICxCON<2:0>). Whenever the
capture channel is turned off, the prescaler counter will
be cleared. In addition, any Reset will clear the
prescaler counter.
FIGURE 12-1:
INPUT CAPTURE MODE BLOCK DIAGRAM
Note:
This data sheet summarizes features of
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals, register descriptions and
general device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046).
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals, register descriptions and
general device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046).
ICxBUF
Prescaler
ICx
ICM<2:0>
Mode Select
3
Note:
Where ‘x’ is shown, reference is made to the registers or bits associated to the respective input
capture channels 1 through N.
capture channels 1 through N.
1
0
Set Flag
Pin
ICxIF
ICTMR
T2_CNT
T3_CNT
Edge
Detection
Logic
Clock
Synchronizer
1, 4, 16
From GP Timer Module
16
16
FIFO
R/W
Logic
ICI<1:0>
ICBNE, ICOV
ICxCON
Interrupt
Logic
Set Flag
ICxIF
ICxIF
Data Bus