PIC18F2420-I/SP Microchip Technology Inc., PIC18F2420-I/SP Datasheet - Page 231

• Manufacturer Part Number: PIC18F2420-I/SP
• Description: 28 Pin, 16 KB Flash, 768 RAM, 25 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2420-I/SP

• A/d Inputs: 10-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 25
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 16K Bytes
• Ram Size: 768 Bytes
• Speed: 40 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

FIGURE 21-2:
TABLE 21-1:
 2003 Microchip Technology Inc.
CVRCON CVREN CVROE
CMCON
TRISA
Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’.
Note 1:
Name
Shaded cells are not used with the comparator voltage reference.
These pins are enabled based on oscillator configuration (see Configuration Register 1H).
C2OUT
Note 1: R is dependent upon the voltage reference configuration bits (CVRCON<3:0> and CVRCON<5>).
RA7
Bit 7
(1)
REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
CV
Module
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
C1OUT
RA6
REF
Bit 6
(1)
Impedance
Reference
Voltage
Output
C2INV
CVRR
Bit 5
RA5
R
(1)
C1INV
Bit 4
RA4
RA2
—
PIC18F2220/2320/4220/4320
CVR3
Bit 3
RA3
CIS
CVR2
Bit 2
CM2
RA2
+
–
CVR1
Bit 1
CM1
RA1
CVR0
Bit 0
CM0
RA0
CV
REF
000- 0000 000- 0000
0000 0111 0000 0111
1111 1111 1111 1111
Output
Value on
POR
DS39599C-page 229
Value on
all other
Resets