PIC16C63A/65B/73B/74B
TABLE 3-1:
Pin Name
OSC1/CLKIN
OSC2/CLKOUT
PIC16C63A/73B PINOUT DESCRIPTION
DIP
Pin#
9
10
SOIC
Pin#
9
10
I/O/P
Type
I
O
Buffer
Type
Description
ST/CMOS
(3)
Oscillator crystal input/external clock source input.
—
Oscillator crystal output. Connects to crystal or resonator in
crystal oscillator mode. In RC mode, the OSC2 pin outputs
CLKOUT which has 1/4 the frequency of OSC1, and denotes
the instruction cycle rate.
Master clear (RESET) input or programming voltage input.
This pin is an active low RESET to the device.
PORTA is a bi-directional I/O port.
RA0 can also be analog input 0
(4)
.
RA1 can also be analog input 1
(4)
.
RA2 can also be analog input 2
(4)
.
RA3 can also be analog input 3 or analog reference
voltage
(4)
.
RA4 can also be the clock input to the Timer0 module.
Output is open drain type.
RA5 can also be analog input 4
(4)
or the slave select for
the synchronous serial port.
PORTB is a bi-directional I/O port. PORTB can be software
programmed for internal weak pull-up on all inputs.
MCLR/V
PP
1
1
I/P
ST
RA0/AN0
(4)
RA1/AN1
(4)
RA2/AN2
(4)
RA3/AN3/V
REF
(4)
RA4/T0CKI
RA5/SS/AN4
(4)
2
3
4
5
6
7
2
3
4
5
6
7
I/O
I/O
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
ST
TTL
RB0/INT
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RC0/T1OSO/T1CKI
RC1/T1OSI/CCP2
RC2/CCP1
RC3/SCK/SCL
RC4/SDI/SDA
RC5/SDO
RC6/TX/CK
RC7/RX/DT
V
SS
V
DD
21
22
23
24
25
26
27
28
11
12
13
14
15
16
17
18
8, 19
20
21
22
23
24
25
26
27
28
11
12
13
14
15
16
17
18
8, 19
20
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
P
P
TTL/ST
(1)
TTL
TTL
TTL
TTL
TTL
TTL/ST
TTL/ST
ST
ST
ST
ST
ST
ST
ST
ST
—
—
(2)
(2)
RB0 can also be the external interrupt pin.
Interrupt-on-change pin.
Interrupt-on-change pin.
Interrupt-on-change pin. Serial programming clock.
Interrupt-on-change pin. Serial programming data.
PORTC is a bi-directional I/O port.
RC0 can also be the Timer1 oscillator output or Timer1
clock input.
RC1 can also be the Timer1 oscillator input or Capture2
input/Compare2 output/PWM2 output.
RC2 can also be the Capture1 input/Compare1
output/PWM1 output.
RC3 can also be the synchronous serial clock input/output
for both SPI and I
2
C modes.
RC4 can also be the SPI Data In (SPI mode) or
data I/O (I
2
C mode).
RC5 can also be the SPI Data Out (SPI mode).
RC6 can also be the USART Asynchronous Transmit
or Synchronous Clock.
RC7 can also be the USART Asynchronous Receive
or Synchronous Data.
Ground reference for logic and I/O pins.
Positive supply 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
Note 1:
This buffer is a Schmitt Trigger input when configured as the external interrupt.
2:
This buffer is a Schmitt Trigger input when used in Serial Programming mode.
3:
This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise.
4:
A/D module is not available in the PIC16C63A.
2000 Microchip Technology Inc.
DS30605C-page 11
MICROCHIP [ MICROCHIP TECHNOLOGY ]
