Manualshelf

Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 20 8-Bit 20 MHz I/O number 11
11121314151617181920
© 2007 Microchip Technology Inc. DS41232D-page 13
PIC12F635/PIC16F636/639
TABLE 1-2: PIC16F636 PINOUT DESCRIPTIONS
Name Function
Input
Type
Output
Type
Description
RA0/C1IN+/ICSPDAT/ULPWU RA0 TTL — General purpose I/O. Individually controlled
interrupt-on-change. Individually enabled pull-up/pull-down.
Selectable Ultra Low-Power Wake-up pin.
C1IN+ AN — Comparator 1 input – positive.
ICSPDAT TTL CMOS Serial programming data I/O.
ULPWU AN — Ultra Low-Power Wake-up input.
RA1/C1IN-/V
REF/ICSPCLK RA1 TTL CMOS General purpose I/O. Individually controlled
interrupt-on-change. Individually enabled pull-up/pull-down.
C1IN- AN — Comparator 1 input – negative.
V
REF AN — External voltage reference
ICSPCLK ST — Serial programming clock.
RA2/T0CKI/INT/C1OUT RA2 ST CMOS General purpose I/O. Individually controlled
interrupt-on-change. Individually enabled pull-up/pull-down.
T0CKI ST — External clock for Timer0.
INT ST — External interrupt.
C1OUT — CMOS Comparator 1 output.
RA3/MCLR
/VPP RA3 TTL — General purpose input. Individually controlled interrupt-on-change.
MCLR
ST — Master Clear Reset. Pull-up enabled when configured as MCLR.
V
PP HV — Programming voltage.
RA4/T1G
/OSC2/CLKOUT RA4 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.
Individually enabled pull-up/pull-down.
T1G
ST — Timer1 gate.
OSC2 — XTAL XTAL connection.
CLKOUT — CMOS T
OSC/4 reference clock.
RA5/T1CKI/OSC1/CLKIN RA5 TTL CMOS General purpose I/O. Individually controlled interrupt-on-change.
Individually enabled pull-up/pull-down.
T1CKI ST — Timer1 clock.
OSC1 XTAL — XTAL connection.
CLKIN ST — T
OSC reference clock.
RC0/C2IN+ RC0 TTL CMOS General purpose I/O.
C2IN+ AN — Comparator 1 input – positive.
RC1/C2IN- RC1 TTL CMOS General purpose I/O.
C2IN- AN — Comparator 1 input – negative.
RC2 RC2 TTL CMOS General purpose I/O.
RC3 RC3 TTL CMOS General purpose I/O.
RC4/C2OUT RC4 TTL CMOS General purpose I/O.
C2OUT — CMOS Comparator 2 output.
RC5 RC5 TTL CMOS General purpose I/O.
V
DD VDD D — Power supply for microcontroller.
V
SS VSS D — Ground reference for microcontroller.
Legend: AN = Analog input or output CMOS = CMOS compatible input or output D = Direct
HV = High Voltage ST = Schmitt Trigger input with CMOS levels
TTL = TTL compatible input XTAL = Crystal