PIC18F2455_07 Datasheet, PDF (19/430 Pages) Microchip Technology – 28/40/44-Pin, High Performance, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

PIC18F2455/2550/4455/4550
TABLE 1-3: PIC18F4455/4550 PINOUT I/O DESCRIPTIONS (CONTINUED)
Pin Name
Pin Number
Pin Buffer
PDIP QFN TQFP ^{Type Type}
Description
PORTA is a bidirectional I/O port.
RA0/AN0
RA0
AN0
2 19 19
I/O TTL Digital I/O.
I Analog Analog input 0.
RA1/AN1
RA1
AN1
3 20 20
I/O TTL Digital I/O.
I Analog Analog input 1.
RA2/AN2/VREF-/
CVREF
RA2
AN2
VREF-
CVREF
4 21 21
I/O TTL
I Analog
I Analog
O Analog
Digital I/O.
Analog input 2.
A/D reference voltage (low) input.
Analog comparator reference output.
RA3/AN3/VREF+
RA3
AN3
VREF+
5 22 22
I/O TTL Digital I/O.
I Analog Analog input 3.
I Analog A/D reference voltage (high) input.
RA4/T0CKI/C1OUT/
RCV
RA4
T0CKI
C1OUT
RCV
6 23 23
I/O ST
I ST
O—
I TTL
Digital I/O.
Timer0 external clock input.
Comparator 1 output.
External USB transceiver RCV input.
RA5/AN4/SS/
HLVDIN/C2OUT
RA5
AN4
SS
HLVDIN
C2OUT
7 24 24
I/O TTL
I Analog
I TTL
I Analog
O—
Digital I/O.
Analog input 4.
SPI slave select input.
High/Low-Voltage Detect input.
Comparator 2 output.
RA6
—— —— —
See the OSC2/CLKO/RA6 pin.
Legend:
Note 1:
2:
3:
TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
O = Output
CMOS = CMOS compatible input or output
I
= Input
P
= Power
Alternate assignment for CCP2 when CCP2MX Configuration bit is cleared.
Default assignment for CCP2 when CCP2MX Configuration bit is set.
These pins are No Connect unless the ICPRT Configuration bit is set. For NC/ICPORTS, the pin is No
Connect unless ICPRT is set and the DEBUG Configuration bit is cleared.
© 2007 Microchip Technology Inc.
Preliminary
DS39632D-page 17