PIC16F7X7
TABLE 1-2:
PIC16F737 AND PIC16F767 PINOUT DESCRIPTION
PDIP
SOIC
SSOP
Pin #
QFN
Pin #
I/O/P
Type
Buffer
Type
Pin Name
Description
(3)
OSC1/CLKI/RA7
OSC1
9
6
7
ST/CMOS
Oscillator crystal or external clock input.
I
I
Oscillator crystal input or external clock source input. ST
buffer when configured in RC mode; otherwise CMOS.
External clock source input. Always associated with pin
function OSC1 (see OSC1/CLKI, OSC2/CLKO pins).
Digital I/O.
CLKI
RA7
I/O
ST
—
OSC2/CLKO/RA6
OSC2
10
Oscillator crystal or clock output.
Oscillator crystal output.
O
Connects to crystal or resonator in Crystal Oscillator
mode.
CLKO
RA6
O
In RC mode, OSC2 pin outputs CLKO which has 1/4 the
frequency of OSC1 and denotes the instruction cycle rate.
Digital I/O.
I/O
ST
ST
MCLR/VPP/RE3
MCLR
1
26
Master Clear (input) or programming voltage (output).
Master Clear (Reset) input. This pin is an active-low
Reset to the device.
I
VPP
RE3
P
I
Programming voltage input.
Digital input only pin.
ST
PORTA is a bidirectional I/O port.
RA0/AN0
RA0
2
3
4
27
28
1
TTL
I/O
I
Digital I/O.
Analog input 0.
AN0
RA1/AN1
RA1
TTL
TTL
I/O
I
Digital I/O.
Analog input 1.
AN1
RA2/AN2/VREF-/CVREF
RA2
I/O
Digital I/O.
AN2
VREF-
CVREF
I
I
0
Analog input 2.
A/D reference voltage input (low).
Comparator voltage reference output.
RA3/AN3/VREF+
RA3
5
6
7
2
3
4
TTL
ST
I/O
I
I
Digital I/O.
Analog input 3.
A/D reference voltage input (high).
AN3
VREF+
RA4/T0CKI/C1OUT
RA4
I/O
I
O
Digital I/O – Open-drain when configured as output.
Timer0 external clock input.
Comparator 1 output bit.
T0CKI
C1OUT
RA5/AN4/LVDIN/SS/C2OUT
TTL
RA5
AN4
I/O
I
Digital I/O.
Analog input 4.
LVDIN
SS
C2OUT
I/O
I
O
Low-Voltage Detect input.
SPI™ slave select input.
Comparator 2 output bit.
Legend:
I = input
O = output
I/O = input/output
P = power
— = Not used
TTL = TTL input
ST = Schmitt Trigger input
Note 1: This buffer is a Schmitt Trigger input when configured as the external interrupt.
2: This buffer is a Schmitt Trigger input when used in Serial Programming mode.
3: This buffer is a Schmitt Trigger input when configured in RC Oscillator mode and a CMOS input otherwise.
4: Pin location of CCP2 is determined by the CCPMX bit in Configuration Word Register 1.
DS30498C-page 8
2004 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
