DSPIC30F6010 MICROCHIP [Microchip Technology], DSPIC30F6010 Datasheet - Page 73

• Manufacturer Part Number: DSPIC30F6010
• Description: High-Performance Digital Signal Controllers
• Manufacturer: MICROCHIP [Microchip Technology]

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
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 dsPIC30F6010 device has 8 capture
channels.
FIGURE 12-1:
 2004 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
(Period)
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
and
Data Bus
ICxCON
Mode Select
ICM<2:0>
Pulse
ICBNE, ICOV
Synchronizer
Clock
measurement.
ICI<1:0>
Preliminary
Detection
Edge
Logic
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
dsPIC30F6010
T2_CNT
1
ICxBUF
16
DS70119D-page 71
0
T3_CNT
16
ICTMR