PIC16F631_08 Datasheet, PDF (96/306 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F631/677/685/687/689/690
FIGURE 8-2:
COMPARATOR C1 SIMPLIFIED BLOCK DIAGRAM
C1CH<1:0>
2
C12IN0-
C12IN1-
C12IN2-
C12IN3-
0
1
MUX
2
3
C1R
C1IN+
FixedRef
0
CVREF
MUX
1
C1VREN
0
MUX
1
Note 1:
2:
3:
C1ON⁽¹⁾
C1POL
DQ
Q1 _EN
To
Data Bus
RD_CM1CON0
DQ
Q3*RD_CM1CON0 _EN
CL
NRESET
Set C1IF
To other peripherals
C1VIN- _-
C1VIN+
C1
+
C1OUT
C1OUT (to SR latch)
C1POL
When C1ON = 0, the C1 comparator will produce a ‘0’ output to the XOR Gate.
Q1 and Q3 are phases of the four-phase system clock (FOSC).
Q1 is held high during Sleep mode.
FIGURE 8-3:
COMPARATOR C2 SIMPLIFIED BLOCK DIAGRAM
C2CH<1:0>
2
C12IN0-
C12IN1-
C12IN2-
C12IN3-
0
1
MUX
2
3
C2ON⁽¹⁾
C2VIN-
C2VIN+ ^C2
C2POL
DQ
Q1 _EN
DQ
Q3*RD_CM2CON0 _EN
CL
NRESET
C2OUT
C2SYNC
To
Data Bus
RD_CM2CON0
Set C2IF
C2R
C2IN+
FixedRef
0
MUX
CVREF ₁
C2VREN
0
MUX
1
Note 1:
2:
3:
C2POL
From TMR1
Clock
DQ
0
MUX
1
SYNCC2OUT
to Timer1 Gate, SR latch
and other peripherals
When C2ON = 0, the C2 comparator will produce a ‘0’ output to the XOR Gate.
Q1 and Q3 are phases of the four-phase system clock (FOSC).
Q1 is held high during Sleep mode.
DS41262E-page 94
© 2008 Microchip Technology Inc.