DSPIC30F2010 datasheet(59/204 Pages) MICROCHIP

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DS70118H-page 59

dsPIC30F2010

9.0

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. Figure 9-

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 dsPIC DSC devices contain up to

eight capture channels, (i.e., the maximum value of

N is 8).

FIGURE 9-1:

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,

descriptions

and

general device functionality, refer to the

“dsPIC30F Family Reference Manual”

(DS70046).

Note:

The

dsPIC30F2010

device

has

four

capture inputs – IC1, IC2, IC7 and IC8.

The

naming

these

four

capture

channels is intentional and preserves

software compatibility with other dsPIC

DSC devices.

ICxBUF

Prescaler

ICx

ICM<2:0>

Mode Select

Note:

Where ‘x’ is shown, reference is made to the registers or bits associated to the respective input capture channels 1 through N.

Set Flag

ICxIF

ICTMR

T2_CNT

T3_CNT

Edge

Detection

Logic

Clock

Synchronizer

1, 4, 16

From General Purpose Timer Module

FIFO

R/W

Logic

ICI<1:0>

ICBNE, ICOV

ICxCON

Interrupt

Logic

Set Flag

ICxIF

Data Bus

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