DSPIC30F6015 Microchip Technology Inc., DSPIC30F6015 Datasheet - Page 81
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DSPIC30F6015
Manufacturer Part Number
DSPIC30F6015
Description
High-performance, 16-bit Digital Signal Controllers
Manufacturer
Microchip Technology Inc.
Datasheet
1.DSPIC30F6015.pdf
(236 pages)
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12.0
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. Figure 12-1
depicts a block diagram of the input capture module.
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:
• 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.
FIGURE 12-1:
© 2007 Microchip Technology Inc.
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).
ICx
Pin
Note:
INPUT CAPTURE MODULE
Where ‘x’ is shown, reference is made to the registers or bits associated to the respective input
capture channels 1 through N.
Prescaler
1, 4, 16
3
INPUT CAPTURE MODE BLOCK DIAGRAM
Data Bus
ICxCON
Mode Select
ICM<2:0>
ICBNE, ICOV
Synchronizer
Clock
ICI<1:0>
Detection
Edge
Logic
dsPIC30F6010A/6015
12.1
The simple capture events in the dsPIC30F product
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>).
12.1.1
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.
Interrupt
Logic
From GP Timer Module
Set Flag
Set Flag
ICxIF
ICxIF
Simple Capture Event Mode
CAPTURE PRESCALER
Logic
FIFO
R/W
T2_CNT
1
ICxBUF
16
DS70150C-page 79
0
T3_CNT
16
ICTMR