PIC16F688 Datasheet, PDF (8/174 Pages) Microchip Technology – 14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F688
TABLE 1-1: PIC16F688 PINOUT DESCRIPTION
Name
Function
Input
Type
Output
Type
Description
RA0/AN0/C1IN+/ICSPDAT/ULPWU RA0
TTL CMOS PORTA I/O w/prog pull-up and interrupt-on-change
AN0
AN
— A/D Channel 0 input
C1IN+
AN
— Comparator 1 input
ICSPDAT TTL CMOS Serial Programming Data I/O
ULPWU
AN
— Ultra Low-Power Wake-up input
RA1/AN1/C1IN-/VREF/ICSPCLK
RA1
TTL CMOS PORTA I/O w/prog pull-up and interrupt-on-change
AN1
AN
— A/D Channel 1 input
C1IN-
AN
— Comparator 1 input
VREF
AN
— External Voltage Reference for A/D
ICSPCLK
ST
— Serial Programming Clock
RA2/AN2/T0CKI/INT/C1OUT
RA3/MCLR/VPP
RA2
AN2
T0CKI
INT
C1OUT
RA3
ST
CMOS PORTA I/O w/prog pull-up and interrupt-on-change
AN
— A/D Channel 2 input
ST
— Timer0 clock input
ST
— External Interrupt
—
CMOS Comparator 1 output
TTL
— PORTA input with interrupt-on-change
RA4/AN3/T1G/OSC2/CLKOUT
MCLR
VPP
RA4
AN3
ST
— Master Clear w/internal pull-up
HV
— Programming voltage
TTL CMOS PORTA I/O w/prog pull-up and interrupt-on-change
AN
— A/D Channel 3 input
T1G
ST
— Timer1 gate
OSC2
—
XTAL Crystal/Resonator
CLKOUT
—
CMOS FOSC/4 output
RA5/T1CKI/OSC1/CLKIN
RA5
TTL CMOS PORTA I/O w/prog pull-up and interrupt-on-change
T1CKI
ST
— Timer1 clock
OSC1
XTAL
— Crystal/Resonator
CLKIN
ST
— External clock input/RC oscillator connection
RC0/AN4/C2IN+
RC0
TTL CMOS PORTC I/O
AN4
AN
— A/D Channel 4 input
C2IN+
AN
Comparator 2 input
RC1/AN5/C2IN-
RC1
TTL CMOS PORTC I/O
AN5
AN
— A/D Channel 5 input
C2IN-
AN
Comparator 2 input
RC2/AN6
RC2
TTL CMOS PORTC I/O
AN6
AN
— A/D Channel 6 input
RC3/AN7
RC3
TTL CMOS PORTC I/O
AN7
AN
— A/D Channel 7 input
RC4/C2OUT/TX/CK
RC4
ST
CMOS PORTC I/O
C2OUT
—
CMOS Comparator 2 output
TX
—
CMOS USART asynchronous output
CK
ST
CMOS USART asynchronous clock
RC5/RX/DT
RC5
ST
CMOS Port C I/O
RX
ST
CMOS USART asynchronous input
DT
ST
CMOS USART asynchronous data
VSS
VSS
Power
— Ground reference
VDD
VDD
Power
— Positive supply
Legend:
AN = Analog input or output
TTL = TTL compatible input
HV = High Voltage
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels
XTAL = Crystal
OC = Open collector output
DS41203B-page 6
Preliminary
 2004 Microchip Technology Inc.