PIC32MX795F512LT-80ISLASHPF datasheet(141/256 Pages) MICROCHIP

141 / 256 page

DS61156G-page 141

PIC32MX5XX/6XX/7XX

16.0 OUTPUT COMPARE

The Output Compare module (OCMP) is used to

generate a single pulse or a train of pulses in response

to selected time base events. For all modes of

operation, the OCMP module compares the values

stored in the OCxR and/or the OCxRS registers to the

value in the selected timer. When a match occurs, the

OCMP module generates an event based on the

selected mode of operation.

The following are some of the key features:

• Multiple Output Compare Modules in a device

• Programmable interrupt generation on compare

event

• Single and Dual Compare modes

• Single and continuous output pulse generation

• Pulse-Width Modulation (PWM) mode

• Hardware-based PWM Fault detection and

automatic output disable

• Programmable selection of 16-bit or 32-bit time

bases

• Can operate from either of two available 16-bit

time bases or a single 32-bit time base

FIGURE 16-1:

OUTPUT COMPARE MODULE BLOCK DIAGRAM

Note 1:

This data sheet summarizes the features

of the PIC32MX5XX/6XX/7XX family of

devices. It is not intended to be a

comprehensive reference source. To

complement the information in this data

sheet, refer to Section 16. “Output

Compare”

(DS61111) in the “PIC32

Family Reference Manual”

, which is

available from the Microchip web site

(www.microchip.com/PIC32).

Some registers and associated bits

described in this section may not be

available on all devices. Refer to

Section 4.0 “Memory Organization”

this data sheet for device-specific register

and bit information.

OCxR(1)

Comparator

Output

Logic

OCM<2:0>

Output Enable

OCx(1)

Set Flag bit

OCxIF(1)

OCxRS(1)

Mode Select

Note 1: Where ‘x’ is shown, reference is made to the registers associated with the respective output compare channels,

1 through 5.

2: The OCFA pin controls the OC1-OC4 channels. The OCFB pin controls the OC5 channel.

3: Each output compare channel can use one of two selectable 16-bit time bases or a single 32-bit timer base.

OCTSEL

OCFA or OCFB(2)

TMR Register Inputs

from Time Bases(3)

Period Match Signals

from Time Bases(3)

Logic

Output

Enable

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