PIC18F24J10-E/ML MICROCHIP [Microchip Technology], PIC18F24J10-E/ML Datasheet - Page 225

• Manufacturer Part Number: PIC18F24J10-E/ML
• Description: 28/40/44-Pin High-Performance RISC Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

18.9
A simplified circuit for an analog input is shown in
Figure 18-4. Since the analog pins are connected to a
digital output, they have reverse biased diodes to V
and V
V
FIGURE 18-4:
TABLE 18-1:
© 2007 Microchip Technology Inc.
CMCON
CVRCON
INTCON
PIR2
PIE2
IPR2
PORTA
LATA
TRISA
Legend: — = unimplemented, read as ‘0’. Shaded cells are unused by the comparator module.
SS
Name
and V
SS
. The analog input, therefore, must be between
Analog Input Connection
Considerations
DD
. If the input voltage deviates from this
VA
GIE/GIEH PEIE/GIEL TMR0IE
OSCFIF
OSCFIE
OSCFIP
CVREN
C2OUT
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR MODULE
—
—
—
R
S
Legend:
< 10k
COMPARATOR ANALOG INPUT MODEL
A
CVROE
C1OUT
IN
CMIF
CMIE
CMIP
Bit 6
—
—
—
C
V
I
R
R
VA
LEAKAGE
C
5 pF
T
PIN
IC
S
PIN
PORTA Data Latch Register (Read and Write to Data Latch)
TRISA5
C2INV
CVRR
Bit 5
RA5
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to various junctions
= Interconnect Resistance
= Source Impedance
= Analog Voltage
—
—
—
Preliminary
V
DD
CVRSS
INT0IE
C1INV
DD
Bit 4
—
—
—
—
—
V
V
T
T
= 0.6V
= 0.6V
PIC18F45J10 FAMILY
TRISA3
BCL1IF
BCL1IE
BCL1IP
range by more than 0.6V in either direction, one of the
diodes is forward biased and a latch-up condition may
occur. A maximum source impedance of 10 kΩ is
recommended for the analog sources. Any external
component connected to an analog input pin, such as
a capacitor or a Zener diode, should have very little
leakage current.
CVR3
RBIE
Bit 3
RA3
CIS
I
±500 nA
V
LEAKAGE
TMR0IF
SS
TRISA2
CVR2
Bit 2
CM2
RA2
—
—
—
R
IC
TRISA1
INT0IF
CVR1
Bit 1
CM1
RA1
—
—
—
CCP2IF
CCP2IE
CCP2IP
TRISA0
Comparator
Input
CVR0
DS39682C-page 223
Bit 0
RBIF
CM0
RA0
on page
Values
Reset
45
45
46
45
45
45
46
46
46