PIC18F452-I/P Microchip Technology Inc., PIC18F452-I/P Datasheet - Page 243

• Manufacturer Part Number: PIC18F452-I/P
• Description: 40 PIN, 32 KB FLASH, 1536 RAM, 34 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F452-I/P

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K 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:
 2004 Microchip Technology Inc.
CVRCON
CMCON
TRISA
Legend: Shaded cells are not used with the comparator voltage reference.
Note 1:
Name
Note 1:
PORTA pins are enabled based on oscillator configuration.
TRISA7
CVREN
C2OUT
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
R is dependent upon the voltage reference configuration bits, CVRCON<3:0> and CVRCON<5>.
CV
Module
VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
(1)
PIC18FXXXX
REF
TRISA6
CVROE
C1OUT
Bit 6
Impedance
Reference
Voltage
Output
R
(1)
(1)
PORTA Data Direction Control Register
C2INV
CVRR
Bit 5
RA2
PIC18F2420/2520/4420/4520
CVRSS
C1INV
Preliminary
Bit 4
CVR3
Bit 3
CIS
+
–
CVR2
Bit 2
CM2
CVR1
Bit 1
CM1
CV
REF
Output
CVR0
Bit 0
CM0
DS39631A-page 241
on page
Values
Reset
51
51
52