PIC16C63A/65B/73B/74B
TABLE 3-2:
PIC16C65B/74B PINOUT DESCRIPTION
TQFP
MQFP
Pin#
DIP
Pin#
PLCC
Pin#
I/O/P
Type
Buffer
Type
Pin Name
Description
(4)
OSC1/CLKIN
13
14
14
15
30
31
I
ST/CMOS
Oscillator crystal input/external clock source input.
OSC2/CLKOUT
O
—
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.
MCLR/VPP
1
2
18
I/P
ST
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.
(5)
(5)
RA0/AN0
2
3
4
5
3
4
5
6
19
20
21
22
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
RA0 can also be analog input 0
RA1 can also be analog input 1
RA2 can also be analog input 2
.
.
.
(5)
(5)
(5)
RA1/AN1
(5)
RA2/AN2
(5)
RA3/AN3/VREF
RA3 can also be analog input 3 or analog reference
(5)
voltage
.
RA4/T0CKI
6
7
7
8
23
24
I/O
I/O
ST
RA4 can also be the clock input to the Timer0 timer/
counter. Output is open drain type.
(5)
(5)
RA5/SS/AN4
TTL
RA5 can also be analog input 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.
(1)
RB0/INT
RB1
33
34
35
36
37
38
39
40
36
37
38
39
41
42
43
8
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
TTL/ST
TTL
RB0 can also be the external interrupt pin.
9
RB2
10
11
14
15
16
17
TTL
RB3
TTL
RB4
TTL
Interrupt-on-change pin.
RB5
TTL
Interrupt-on-change pin.
(2)
RB6
TTL/ST
TTL/ST
Interrupt-on-change pin. Serial programming clock.
(2)
RB7
44
Interrupt-on-change pin. Serial programming data.
P = power
Legend: I = input
O = output
TTL = TTL input
I/O = input/output
ST = Schmitt Trigger input
— = Not used
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 ]
