Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SOIC 14 8-Bit 4 MHz I/O number 11

 1999-2012 Microchip Technology Inc. DS40192D-page 9

PIC16C505

TABLE 3-1: PIC16C505 PINOUT DESCRIPTION

Name

DIP

Pin #

SOIC

Pin #

I/O/P

Type

Buffer

Type

Description

RB0 13 13 I/O TTL/ST Bi-directional I/O port/ serial programming data. Can

be software programmed for internal weak pull-up and

wake-up from SLEEP on pin change. This buffer is a

Schmitt Trigger input when used in serial programming

mode.

RB1 12 12 I/O TTL/ST Bi-directional I/O port/ serial programming clock. Can

be software programmed for internal weak pull-up and

wake-up from SLEEP on pin change. This buffer is a

Schmitt Trigger input when used in serial programming

mode.

RB2 11 11 I/O TTL Bi-directional I/O port.

RB3/MCLR

/VPP 4 4 I TTL/ST Input port/master clear (reset) input/programming volt-

age input. When configured as MCLR

, this pin is an

active low reset to the device. Voltage on MCLR

/VPP

must not exceed V

DD during normal device operation.

Can be software programmed for internal weak pull-up

and wake-up from SLEEP on pin change. Weak pull-

up only when configured as RB3. ST when configured

as MCLR.

RB4/OSC2/CLKOUT 3 3 I/O TTL Bi-directional I/O port/oscillator crystal output. Con-

nections to crystal or resonator in crystal oscillator

mode (XT and LP modes only, RB4 in other modes).

Can be software programmed for internal weak pull-up

and wake-up from SLEEP on pin change. In EXTRC

and INTRC modes, the pin output can be configured to

CLKOUT, which has 1/4 the frequency of OSC1 and

denotes the instruction cycle rate.

RB5/OSC1/CLKIN 2 2 I/O TTL/ST Bidirectional IO port/oscillator crystal input/external

clock source input (RB5 in Internal RC mode only,

OSC1 in all other oscillator modes). TTL input when

RB5, ST input in external RC oscillator mode.

RC0 10 10 I/O TTL Bi-directional I/O port.

RC1 9 9 I/O TTL Bi-directional I/O port.

RC2 8 8 I/O TTL Bi-directional I/O port.

RC3 7 7 I/O TTL Bi-directional I/O port.

RC4 6 6 I/O TTL Bi-directional I/O port.

RC5/T0CKI 5 5 I/O ST Bi-directional I/O port. Can be configured as T0CKI.

DD 1 1 P — Positive supply for logic and I/O pins

SS 14 14 P — 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