DSPIC33FJ06GS201TESLASHMM datasheet(193/346 Pages) MICROCHIP

193 / 346 page

Preliminary

DS70318D-page 191

dsPIC33FJ06GS101/X02 and dsPIC33FJ16GSX02/X04

13.0

INPUT CAPTURE

The input capture module is useful in applications

requiring frequency (period) and pulse measurement.

The

dsPIC33FJ06GS101/X02

and

dsPIC33FJ16GSX02/X04 devices support up to two

input capture channels.

The input capture module captures the 16-bit value of

the selected Time Base register when an event occurs

at the ICx pin. The events that cause a capture event

are listed below in three categories:

• Simple Capture Event modes:

- Capture timer value on every falling edge of

input at ICx pin

- Capture timer value on every rising edge of

input at ICx pin

• Capture timer value on every edge (rising and

falling)

• Prescaler Capture Event modes:

- Capture timer value on every 4th rising edge

of input at ICx pin

- Capture timer value on every 16th rising

edge of input at ICx pin

Each input capture channel can select one of the

two 16-bit timers (Timer2 or Timer3) for the time

base. The selected timer can use either an internal

or external clock.

Other operational features include:

• Device wake-up from capture pin during CPU

Sleep and Idle modes

• Interrupt on input capture event

• 4-word FIFO buffer for capture values

- Interrupt optionally generated after 1, 2, 3 or

4 buffer locations are filled

• Use of input capture to provide additional sources

of external interrupts

FIGURE 13-1:

INPUT CAPTURE BLOCK DIAGRAM

Note:

This data sheet summarizes the features

of the dsPIC33FJ06GS101/X02 and

dsPIC33FJ16GSX02/X04

families

devices. It is not intended to be a

comprehensive reference source. To

complement the information in this data

sheet, refer to the “dsPIC33F Family

Reference Manual”

, Section 12. “Input

Capture”

(DS70198), which is available

the

Microchip

web

site

(www.microchip.com).

ICxBUF

ICx Pin

ICM<2:0> (ICxCON<2:0>)

Mode Select

Set Flag ICxIF

(in IFSx Register)

TMR2 TMR3

Edge Detection Logic

FIFO

R/W

Logic

ICxI<1:0>

ICOV, ICBNE (ICxCON<4:3>)

ICxCON

Interrupt

Logic

System Bus

From 16-Bit Timers

ICTMR

(ICxCON<7>)

Prescaler

Counter

(1, 4, 16)

and

Clock Synchronizer

Note 1:

An ‘x’ in a signal, register or bit name denotes the number of the capture channel.

DSPIC33FJ06GS201TE/MM Datasheet(PDF) 193 Page - Microchip Technology

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