PIC18FXX39 Datasheet, PDF (14/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel

PIC18FXX39
TABLE 1-3: PIC18F4X39 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number
Pin Buffer
DIP QFN TQFP ^{Type Type}
Description
MCLR/VPP
MCLR
VPP
1 18 18
I
I
Master Clear (input) or high voltage ICSP
programming enable pin.
ST
Master Clear (Reset) input. This pin is an active
low RESET to the device.
ST
High voltage ICSP programming enable pin.
OSC1/CLKI
OSC1
CLKI
13 32 30
Oscillator crystal or external clock input.
I CMOS
Oscillator crystal input or external clock source
input.
I CMOS
External clock source input. Always associated
with pin function OSC1. (See related OSC1/CLKI,
OSC2/CLKO pins.)
OSC2/CLKO/RA6
OSC2
CLKO
RA6
14 33 31
O
O
I/O
Oscillator crystal or clock output.
—
Oscillator crystal output. Connects to crystal
or resonator in Crystal Oscillator mode.
—
In EC mode, OSC2 pin outputs CLKO,
which has 1/4 the frequency of OSC1 and
denotes the instruction cycle rate.
TTL
General purpose I/O pin.
PORTA is a bi-directional I/O port.
RA0/AN0
RA0
AN0
2 19 19
I/O TTL
I Analog
Digital I/O.
Analog input 0.
RA1/AN1
RA1
AN1
3 20 20
I/O TTL
I Analog
Digital I/O.
Analog input 1.
RA2/AN2/VREF-
RA2
AN2
VREF-
4 21 21
I/O TTL
I Analog
I Analog
Digital I/O.
Analog input 2.
A/D Reference Voltage (Low) input.
RA3/AN3/VREF+
RA3
AN3
VREF+
5 22 22
I/O TTL
I Analog
I Analog
Digital I/O.
Analog input 3.
A/D Reference Voltage (High) input.
RA4/T0CKI
RA4
T0CKI
6 23 23
I/O ST/OD
I
ST
Digital I/O. Open drain when configured as output.
Timer0 external clock input.
RA5/AN4/SS/LVDIN 7 24 24
RA5
I/O TTL
AN4
I Analog
SS
I
ST
LVDIN
I Analog
Digital I/O.
Analog input 4.
SPI Slave Select input.
Low Voltage Detect input.
RA6
(See the OSC2/CLKO/RA6 pin.)
Legend: TTL = TTL compatible input
ST = Schmitt Trigger input with CMOS levels
O = Output
OD = Open Drain (no P diode to VDD)
CMOS = CMOS compatible input or output
I
= Input
P
= Power
DS30485B-page 14
Preliminary
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