PIC18F8722-I/PT Microchip Technology Inc., PIC18F8722-I/PT Datasheet - Page 287

• Manufacturer Part Number: PIC18F8722-I/PT
• Description: 80 PIN, 128 KB FLASH, 4K RAM, 70 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F8722-I/PT

• A/d Inputs: 16-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 70
• Interface: SPI/I2C/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 80-pin TQFP
• Programmable Memory: 128K Bytes
• Ram Size: 3.9K Bytes
• Speed: 40 MHz
• Timers: 2-8 bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

22.9
A simplified circuit for an analog input is shown in
Figure 22-4. Since the analog pins are connected to a
digital output, they have reverse biased diodes to V
and V
V
FIGURE 22-4:
TABLE 22-1:
 2004 Microchip Technology Inc.
CMCON
CVRCON
INTCON
PIR2
PIE2
IPR2
TRISF
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
TRISF7
C2OUT
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR MODULE
R
S
Legend:
< 10k
COMPARATOR ANALOG INPUT MODEL
A
CVROE
C1OUT
TRISF6
IN
CMIF
CMIE
CMIP
Bit 6
C
V
I
R
R
VA
LEAKAGE
C
5 pF
T
PIN
IC
S
PIN
TRISF5
C2INV
CVRR
Bit 5
= Input Capacitance
= Threshold Voltage
= Leakage Current at the pin due to various junctions
= Interconnect Resistance
= Source Impedance
= Analog Voltage
—
—
—
Preliminary
DD
V
CVRSS
TRISF4
INT0IE
C1INV
EEIF
EEIE
EEIP
DD
Bit 4
V
V
T
T
= 0.6V
= 0.6V
BCL1IF
BCL1IE
BCL1IP
TRISF3
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
PIC18F8722 FAMILY
Bit 3
CIS
I
±500 nA
V
LEAKAGE
TMR0IF
HLVDIE
HLVDIP
SS
HLVDIF
TRISF2
CVR2
Bit 2
CM2
R
IC
TMR3IF
TMR3IE
TMR3IP
TRISF1
INT0IF
CVR1
Bit 1
CM1
CCP2IF
CCP2IE
CCP2IP
TRISF0
Comparator
Input
CVR0
DS39646B-page 285
RBIF
Bit 0
CM0
on page
Values
Reset
59
59
60
60
60
60
60