PIC16C63A/65B/73B/74B
TABLE 3-2:
Pin Name
OSC1/CLKIN
OSC2/CLKOUT
PIC16C65B/74B PINOUT DESCRIPTION
DIP
Pin#
13
14
PLCC
Pin#
14
15
TQFP
I/O/P
MQFP
Type
Pin#
30
31
I
O
Buffer
Type
Description
ST/CMOS
(4)
Oscillator crystal input/external clock source input.
—
Oscillator crystal output. Connects to crystal or resonator in
crystal oscillator mode. In RC mode, 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
(5)
.
RA1 can also be analog input 1
(5)
.
RA2 can also be analog input 2
(5)
.
RA3 can also be analog input 3 or analog reference
voltage
(5)
.
RA4 can also be the clock input to the Timer0 timer/
counter. Output is open drain type.
RA5 can also be analog input 4
(5)
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
2
18
I/P
ST
RA0/AN0
(5)
2
3
4
5
6
7
3
4
5
6
7
8
19
20
21
22
23
24
I/O
I/O
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
ST
TTL
RA1/AN1
(5)
RA2/AN2
(5)
RA3/AN3/V
REF
(5)
RA4/T0CKI
RA5/SS/AN4
(5)
RB0/INT
RB1
RB2
RB3
RB4
RB5
RB6
RB7
33
34
35
36
37
38
39
40
36
37
38
39
41
42
43
44
8
9
10
11
14
15
16
17
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
TTL/ST
(1)
TTL
TTL
TTL
TTL
TTL
TTL/ST
(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.
TTL/ST
(2)
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 as general purpose I/O and a TTL input when used in the Parallel
Slave Port mode (for interfacing to a microprocessor bus).
4:
This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise.
5:
A/D is not available on the PIC16C65B.
DS30605C-page 12
2000 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
