PIC18F-LF1XK50 MICROCHIP [Microchip Technology], PIC18F-LF1XK50 Datasheet - Page 232

• Manufacturer Part Number: PIC18F-LF1XK50
• Description: 20-Pin USB Flash Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F/LF1XK50
18.8
There are four additional comparator features:
• Simultaneous read of comparator outputs
• Internal reference selection
• Hysteresis selection
• Output Synchronization
18.8.1
The MC1OUT and MC2OUT bits of the CM2CON1
register are mirror copies of both comparator outputs.
The ability to read both outputs simultaneously from a
single register eliminates the timing skew of reading
separate registers.
18.8.2
There are two internal voltage references available to
the non-inverting input of each comparator. One of
these is the Fixed Voltage Reference (FVR) and the
other is the variable Comparator Voltage Reference
(CV
determines which of these references is routed to the
Comparator Voltage reference output (C
ther routing to the comparator is accomplished by the
CxR bit of the CMxCON0 register. See
“Voltage Reference”
for more detail.
18.8.3
The Comparator Cx have selectable hysteresis. The
hysteresis can be enable by setting the CxHYS bit of
the CM2CON1 register. See
Specifications”
18.8.4
The Comparator Cx output can be synchronized with
Timer1 by setting the CxSYNC bit of the CM2CON1
register. When enabled, the Cx output is latched on
the rising edge of the Timer1 source clock. If a pres-
caler is used with Timer1, the comparator output is
latched after the prescaling function. To prevent a
race condition, the comparator output is latched on
the rising edge of the Timer1 clock source and Timer1
increments on the rising edge of its clock source. See
the Comparator Block Diagram
Figure
(Figure
DS41350E-page 232
Note 1: Obtaining the status of C1OUT or
REF
18-3)
). The CxRSEL bit of the CM2CON register
18-2) for more information.
Additional Comparator Features
SIMULTANEOUS COMPARATOR
OUTPUT READ
INTERNAL REFERENCE
SELECTION
COMPARATOR HYSTERESIS
SYNCHRONIZING COMPARATOR
OUTPUT TO TIMER 1
C2OUT by reading CM2CON1 does not
affect the comparator interrupt mismatch
registers.
and
for more details.
the
and
Figure 18-2
Timer1
Section 27.0 “Electrical
(Figure 18-2
Block
and
Section 21.1
X
V
Figure 18-3
REF
Diagram
). Fur-
and
Preliminary
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