PIC16F688
TABLE 1-1:
PIC16F688 PINOUT DESCRIPTION
Name
RA0/AN0/C1IN+/ICSPDAT/ULPWU
Function
RA0
AN0
C1IN+
ICSPDAT
ULPWU
RA1/AN1/C1IN-/V
REF
/ICSPCLK
RA1
AN1
C1IN-
V
REF
ICSPCLK
RA2/AN2/T0CKI/INT/C1OUT
RA2
AN2
T0CKI
INT
C1OUT
RA3/MCLR/V
PP
RA3
MCLR
V
PP
RA4/AN3/T1G/OSC2/CLKOUT
RA4
AN3
T1G
OSC2
CLKOUT
RA5/T1CKI/OSC1/CLKIN
RA5
T1CKI
OSC1
CLKIN
RC0/AN4/C2IN+
RC0
AN4
C2IN+
RC1/AN5/C2IN-
RC1
AN5
C2IN-
RC2/AN6
RC3/AN7
RC4/C2OUT/TX/CK
RC2
AN6
RC3
AN7
RC4
C2OUT
TX
CK
RC5/RX/DT
RC5
RX
DT
V
SS
V
DD
Legend:
AN
TTL
HV
V
SS
V
DD
= Analog input or output
= TTL compatible input
= High Voltage
Input
Type
TTL
AN
AN
TTL
AN
TTL
AN
AN
AN
ST
ST
AN
ST
ST
—
TTL
ST
HV
TTL
AN
ST
—
—
TTL
ST
XTAL
ST
TTL
AN
AN
TTL
AN
AN
TTL
AN
TTL
AN
TTL
—
—
ST
TTL
ST
ST
Power
Power
CMOS
—
CMOS
—
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
CMOS
—
—
CMOS
—
Output
Type
CMOS
—
—
CMOS
—
CMOS
—
—
—
—
CMOS
—
—
—
CMOS
—
—
—
CMOS
—
—
XTAL
CMOS
CMOS
—
—
—
CMOS
—
A/D Channel 0 input
Comparator 1 input
Serial Programming Data I/O
Ultra Low-Power Wake-up input
PORTA I/O w/prog pull-up and interrupt-on-change
A/D Channel 1 input
Comparator 1 input
External Voltage Reference for A/D
Serial Programming Clock
PORTA I/O w/prog pull-up and interrupt-on-change
A/D Channel 2 input
Timer0 clock input
External Interrupt
Comparator 1 output
PORTA input with interrupt-on-change
Master Clear w/internal pull-up
Programming voltage
PORTA I/O w/prog pull-up and interrupt-on-change
A/D Channel 3 input
Timer1 gate
Crystal/Resonator
F
OSC
/4 output
PORTA I/O w/prog pull-up and interrupt-on-change
Timer1 clock
Crystal/Resonator
External clock input/RC oscillator connection
PORTC I/O
A/D Channel 4 input
Comparator 2 input
PORTC I/O
A/D Channel 5 input
Comparator 2 input
PORTC I/O
A/D Channel 6 input
PORTC I/O
A/D Channel 7 input
PORTC I/O
Comparator 2 output
USART asynchronous output
USART asynchronous clock
Port C I/O
USART asynchronous input
USART asynchronous data
Ground reference
Positive supply
OC = Open collector output
Description
PORTA I/O w/prog pull-up and interrupt-on-change
CMOS = CMOS compatible input or output
ST
= Schmitt Trigger input with CMOS levels
XTAL = Crystal
DS41203D-page 6
©
2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
