PIC12C67X
TABLE 3-1:
Name
GP0/AN0
PIC12C67X PINOUT DESCRIPTION
DIP Pin #
7
I/O/P
Type
I/O
Buffer
Type
Description
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.
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 programming mode.
ST
Bi-directional I/O port/analog input 2. Can be configured as
T0CKI or external interrupt.
GP1/AN1/V
REF
6
I/O
GP2/T0CKI/AN2/INT
GP3/MCLR/V
PP
5
4
I/O
I
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/V
PP
must not exceed
V
DD
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.
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 configured to CLK-
OUT, which has 1/4 the frequency of OSC1 and denotes the
instruction cycle rate.
GP4/OSC2/AN3/CLKOUT
3
I/O
GP5/OSC1/CLKIN
2
I/O
TTL/ST Bi-directional IO port/oscillator crystal input/external clock
source input (GPIO in INTRC mode only, OSC1 in all other
oscillator modes). Schmitt trigger input for EXTRC oscillator
mode.
—
—
Positive supply for logic and I/O pins.
Ground reference for logic and I/O pins.
V
DD
V
SS
1
8
P
P
Legend: I = input, O = output, I/O = input/output, P = power, — = not used, TTL = TTL input,
ST = Schmitt Trigger input.
©
1999 Microchip Technology Inc.
DS30561B-page 9
MICROCHIP [ MICROCHIP TECHNOLOGY ]
