PIC12CE67X datasheet(9/116 Pages) MICROCHIP

9 / 116 page

Preliminary

DS40181B-page 9

PIC12CE67X

TABLE 3-1:

PIC12CE67X PINOUT DESCRIPTION

Name

DIP Pin

I/O/P

Type

Buffer

Type

Description

GP0/AN0

I/O

TTL/ST

Bi-directional I/O port/serial programming data/analog input

0. Can be software programmed for internal weak pull-up

and interrupt on pin change. This buffer is a Schmitt Trigger

input when used in serial programming mode.

GP1/AN1/VREF

I/O

TTL/ST

Bi-directional I/O port/serial programming clock/analog

input 1/voltage reference. Can be software programmed for

internal weak pull-up and interrupt on pin change. This

buffer is a Schmitt Trigger input when used in serial pro-

gramming mode.

GP2/T0CKI/AN2/INT

I/O

Bi-directional I/O port/analog input 2. Can be conﬁgured as

T0CKI or external interrupt.

GP3/MCLR/VPP

TTL/ST

Input port/master clear (reset) input/programming voltage

input. 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. Can be software pro-

grammed for internal weak pull-up and interrupt on pin

change. Weak pull-up always on if conﬁgured as MCLR .

This buffer is Schmitt Trigger when in MCLR mode.

GP4/OSC2/AN3/

CLKOUT

I/O

TTL

Bi-directional I/O port/oscillator crystal output/analog input

3. Connections to crystal or resonator in crystal oscillator

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

In EXTRC and INTRC modes, the pin output can be conﬁg-

ured to CLKOUT which has 1/4 the frequency of OSC1 and

denotes the instruction cycle rate.

GP5/OSC1/CLKIN

I/O

TTL/ST

Bidirectional IO port/oscillator crystal input/external clock

source input (GPIO in INTRC mode only, OSC1 in all other

oscillator modes). Schmitt trigger in EXTRC mode only.

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

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