PIC18F6621-I/PT Microchip Technology Inc., PIC18F6621-I/PT Datasheet - Page 253

• Manufacturer Part Number: PIC18F6621-I/PT
• Description: 64 PIN, 64 KB FLASH, 3840 RAM, 52 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F6621-I/PT

• A/d Inputs: 12-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 1024 Bytes
• Input Output: 54
• Interface: I2C/SPI/UART/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 64-pin TQFP
• Programmable Memory: 64K Bytes
• Ram Size: 3.8K 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

FIGURE 22-2:
TABLE 22-1:
 2005 Microchip Technology Inc.
CVRCON CVREN CVROE
CMCON
TRISF
Legend: x = unknown, u = unchanged, – = unimplemented, read as ‘0’.
Name
Note 1:
Shaded cells are not used with the comparator voltage reference.
C2OUT
TRISF7 TRISF6 TRISF5 TRISF4 TRISF3 TRISF2 TRISF1 TRISF0 1111 1111 1111 1111
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
COMPARATOR VOLTAGE REFERENCE OUTPUT BUFFER EXAMPLE
C1OUT
REF
Bit 6
Impedance
Reference
Voltage
Output
C2INV
CVRR
Bit 5
R
(1)
CVRSS
C1INV
Bit 4
PIC18F6525/6621/8525/8621
RF5
CVR3
Bit 3
CIS
CVR2
Bit 2
CM2
+
–
CVR1
Bit 1
CM1
CVR0
Bit 0
CM0
CV
REF
0000 0000 0000 0000
0000 0000 0000 0000
Output
Value on
POR
DS39612B-page 251
Value on
all other
Resets