PIC32MX5XX_11 Datasheet, PDF (141/256 Pages) Microchip Technology – High-Performance, USB, CAN and Ethernet 32-bit Flash Microcontrollers

PIC32MX5XX/6XX/7XX
16.0 OUTPUT COMPARE
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).
2: Some registers and associated bits
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization” in
this data sheet for device-specific register
and bit information.
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
Set Flag bit
OCxIF⁽¹⁾
OCxRS⁽¹⁾
OCxR⁽¹⁾
Comparator
Output
Logic
SQ
R
3
OCM<2:0>
Mode Select
Output
Enable
Output Enable
Logic
OCx⁽¹⁾
OCFA or OCFB⁽²⁾
0
1
OCTSEL
0
1
16
16
TMR Register Inputs
from Time Bases⁽³⁾
Period Match Signals
from Time Bases⁽³⁾
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.
© 2009-2011 Microchip Technology Inc.
DS61156G-page 141