PIC18F2550-I/SP Microchip Technology Inc., PIC18F2550-I/SP Datasheet - Page 279

• Manufacturer Part Number: PIC18F2550-I/SP
• Description: Microcontroller; 32 KB Flash; 2048 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2550-I/SP

• A/d Inputs: 10-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 23
• Interface: I2C/SPI/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 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 23-2:
TABLE 23-1:
© 2006 Microchip Technology Inc.
CVRCON
CMCON
TRISA
Legend: Shaded cells are not used with the comparator voltage reference.
Note 1:
Name
Note 1:
PORTA<6> and its direction and latch bits are individually configured as port pins based on various
oscillator modes. When disabled, these bits read as ‘0’.
CVREN
C2OUT
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
—
R is dependent upon the voltage reference configuration bits, CVRCON<5> and CVRCON<3:0>.
CV
Module
COMPARATOR VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
PIC18FXXXX
REF
TRISA6
CVROE
C1OUT
Bit 6
Impedance
Reference
Voltage
Output
R
(1)
(1)
TRISA5
C2INV
CVRR
Bit 5
RA2
PIC18F2455/2550/4455/4550
TRISA4
CVRSS
C1INV
Preliminary
Bit 4
TRISA3
CVR3
Bit 3
CIS
+
–
TRISA2
CVR2
Bit 2
CM2
TRISA1
CVR1
Bit 1
CM1
CV
REF
Output
TRISA0
CVR0
Bit 0
CM0
DS39632C-page 277
on page
Values
Reset
53
53
54