DSPIC30F2010 MICROCHIP [Microchip Technology], DSPIC30F2010 Datasheet - Page 69

• Manufacturer Part Number: DSPIC30F2010
• Description: High-Performance, 16-Bit Digital Signal Controllers
• Manufacturer: MICROCHIP [Microchip Technology]

11.0
This section describes the Input Capture module and
associated operational modes. The features provided
by this module are useful in applications requiring Fre-
quency (Period) and Pulse measurement. Figure 11-1
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 11-1:
© 2006 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
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). The dsPIC DSC devices contain up to 8
capture channels, (i.e., the maximum value of N is 8).
Interrupt
Logic
Note:
Set Flag
Set Flag
ICxIF
ICxIF
The dsPIC30F2010 device has four
capture inputs – IC1, IC2, IC7 and IC8.
The naming of these four capture chan-
nels is intentional and preserves software
compatibility with other dsPIC DSC
devices.
FIFO
Logic
R/W
dsPIC30F2010
T2_CNT
1
ICxBUF
16
DS70118G-page 67
0
T3_CNT
16
ICTMR