Datasheet
2009-2016 Microchip Technology Inc. DS60001156J-page 185
PIC32MX5XX/6XX/7XX
17.0 OUTPUT COMPARE
The Output Compare module is used to generate a
single pulse or a series of pulses in response to
selected time base events. For all modes of operation,
the Output Compare 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
Output Compare module generates an event based on
the selected mode of operation.
The following are key features of the Output Compare
module:
• 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 17-1: OUTPUT COMPARE MODULE BLOCK DIAGRAM
Note: 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 Com-
pare” (DS60001111) in the “PIC32 Family
Reference Manual”, which is available
from the Microchip web site
(www.microchip.com/PIC32).
OCxR
(1)
Comparator
Output
Logic
QS
R
OCM<2:0>
Output Enable
OCx
(1)
Set Flag bit
OCxIF
(1)
OCxRS
(1)
Mode Select
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.
0
1
OCTSEL
0
1
16
16
OCFA or OCFB
(2)
TMR Register Inputs
from Time Bases
(3)
Period Match Signals
from Time Bases
(3)
Logic
Output
Enable