PIC12F508 datasheet(15/106 Pages) MICROCHIP

15 / 106 page

Preliminary

DS41236D-page 13

PIC12F508/509/16F505

TABLE 3-3:

PIC16F505 PINOUT DESCRIPTION

Name

Function

Input

Type

Output

Type

Description

RB0/ICSPDAT

RB0

TTL

CMOS Bidirectional I/O pin. Can be software programmed for internal

weak pull-up and wake-up from Sleep on pin change.

ICSPDAT

CMOS In-Circuit Serial Programming™ data pin.

RB1/ICSPCLK

RB1

TTL

CMOS Bidirectional I/O pin. Can be software programmed for internal

weak pull-up and wake-up from Sleep on pin change.

ICSPCLK

CMOS In-Circuit Serial Programming clock pin.

RB2

TTL

CMOS Bidirectional I/O pin.

RB3/MCLR/VPP

RB3

TTL

—

Input port. Can be software programmed for internal weak

pull-up and wake-up from Sleep on pin change.

MCLR

—

Master Clear (Reset). When configured as MCLR, this pin is

an active-low Reset to the device. Voltage on MCLR/VPP must

not exceed VDD during normal device operation or the device

will enter Programming mode. Weak pull-up always on if

configured as MCLR.

VPP

—

Programming voltage input.

RB4/OSC2/CLKOUT

RB4

TTL

CMOS Bidirectional I/O pin. Can be software programmed for internal

weak pull-up and wake-up from Sleep on pin change.

OSC2

—

XTAL

Oscillator crystal output. Connections to crystal or resonator in

Crystal Oscillator mode (XT, HS and LP modes only).

CLKOUT

—

CMOS In EXTRC and INTRC modes, the pin output can be

configured for CLKOUT, which has 1/4 the frequency of OSC1

and denotes the instruction cycle rate.

RB5/OSC1/CLKIN

RB5

TTL

CMOS Bidirectional I/O pin.

OSC1

XTAL

—

Crystal input.

CLKIN

—

External clock source input.

RC0

TTL

CMOS Bidirectional I/O pin.

RC1

TTL

CMOS Bidirectional I/O pin.

RC2

TTL

CMOS Bidirectional I/O pin.

RC3

TTL

CMOS Bidirectional I/O pin.

RC4

TTL

CMOS Bidirectional I/O pin.

RC5/T0CKI

RC5

TTL

CMOS Bidirectional I/O pin.

T0CKI

—

Clock input to TMR0.

VDD

—

Positive supply for logic and I/O pins.

VSS

—

Ground reference for logic and I/O pins.

Legend: I = Input, O = Output, I/O = Input/Output, P = Power, — = Not used, TTL = TTL input,

ST = Schmitt Trigger input, HV = High Voltage

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