DSPIC30F3011 Microchip Technology Inc., DSPIC30F3011 Datasheet - Page 79

• Manufacturer Part Number: DSPIC30F3011
• Description: Dspic30f3010/3011 Enhanced Flash 16-bit Digital Signal Controller
• Manufacturer: Microchip Technology Inc.

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
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
(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>
Confidential
Detection
Edge
Logic
From General Purpose Timer Module
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).
Interrupt
Logic
Note:
dsPIC30F3010/3011
Set Flag
Set Flag
ICxIF
ICxIF
The dsPIC30F3010/3011 devices have
four capture channels. The channels are
designated IC1, IC2, IC7 and IC8 to
maintain software compatibility with other
dsPIC30F devices.
FIFO
Logic
R/W
T2_CNT
1
ICxBUF
16
DS70141D-page 77
0
T3_CNT
16
ICTMR