PIC18F2450 Datasheet, PDF (19/320 Pages) Microchip Technology – 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology

PIC18F2450/4450
TABLE 1-3: PIC18F4450 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-
RA2
AN2
VREF-
4 21 21
I/O TTL Digital I/O.
I Analog Analog input 2.
I Analog A/D reference voltage (low) input.
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/RCV
RA4
T0CKI
RCV
6 23 23
I/O ST
Digital I/O.
I
ST
Timer0 external clock input.
I TTL External USB transceiver RCV input.
RA5/AN4/HLVDIN
RA5
AN4
HLVDIN
7 24 24
I/O TTL Digital I/O.
I Analog Analog input 4.
I Analog High/Low-Voltage Detect input.
RA6
—— —— —
See the OSC2/CLKO/RA6 pin.
Legend:
Note 1:
TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels I
= Input
O = Output
P
= Power
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.
© 2006 Microchip Technology Inc.
Advance Information
DS39760A-page 17