PIC18F87J90 Datasheet, PDF (21/450 Pages) Microchip Technology – 64/80-Pin, High-Performance Microcontrollers with LCD Driver and nanoWatt Technology

PIC18F87J90 FAMILY
TABLE 1-4: PIC18F8XJ90 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number _{Pin Buffer}
TQFP ^{Type Type}
Description
MCLR
OSC1/CLKI/RA7
OSC1
CLKI
RA7
OSC2/CLKO/RA6
OSC2
CLKO
RA6
9
I
ST Master Clear (input) or programming voltage (input). This
pin is an active-low Reset to the device.
49
Oscillator crystal or external clock input.
I CMOS Oscillator crystal input.
I CMOS External clock source input. Always associated
with pin function, OSC1. (See related OSC1/CLKI,
OSC2/CLKO pins.)
I/O TTL
General purpose I/O pin.
50
Oscillator crystal or clock output.
O
—
Oscillator crystal output. Connects to crystal or
resonator in Crystal Oscillator mode.
O
—
In EC modes, OSC2 pin outputs CLKO, which has
1/4 the frequency of OSC1 and denotes the
instruction cycle rate.
I/O TTL
General purpose I/O pin.
PORTA is a bidirectional I/O port.
RA0/AN0
RA0
AN0
30
I/O TTL
Digital I/O.
I Analog Analog Input 0.
RA1/AN1/SEG18
RA1
AN1
SEG18
29
I/O TTL
Digital I/O.
I Analog Analog Input 1.
O Analog SEG18 output for LCD.
RA2/AN2/VREF-
RA2
AN2
VREF-
28
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+
27
I/O TTL
Digital I/O.
I Analog Analog Input 3.
I Analog A/D reference voltage (high) input.
RA4/T0CKI/SEG14
RA4
T0CKI
SEG14
34
I/O ST
Digital I/O.
I
ST
Timer0 external clock input.
O Analog SEG14 output for LCD.
RA5/AN4/SEG15
RA5
AN4
SEG15
33
I/O TTL
Digital I/O.
I Analog Analog Input 4.
O Analog SEG15 output for LCD.
RA6
See the OSC2/CLKO/RA6 pin.
RA7
Legend:
Note 1:
2:
See the OSC1/CLKI/RA7 pin.
TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
I = Input
P = Power
I²C™ = I²C/SMBus
CMOS
Analog
O
OD
= CMOS compatible input or output
= Analog input
= Output
= Open-Drain (no P diode to VDD)
Default assignment for CCP2 when the CCP2MX Configuration bit is set.
Alternate assignment for CCP2 when the CCP2MX Configuration bit is cleared.
 2010 Microchip Technology Inc.
DS39933D-page 21