PIC16C5X
TABLE 3-1:
Name
PINOUT DESCRIPTION - PIC16C52, PIC16C54s, PIC16CR54s, PIC16C56s,
PIC16CR56s, PIC16C58s, PIC16CR58s
DIP, SOIC SSOP I/O/P Input
Description
No.
No. Type Levels
RA0
RA1
RA2
RA3
17
18
1
19
20
1
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
Bi-directional I/O port
Bi-directional I/O port
2
2
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
6
7
8
7
8
9
10
11
12
13
14
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
9
10
11
12
13
T0CKI
3
3
I
ST
Clock input to Timer0. Must be tied to VSS or VDD, if not in
use, to reduce current consumption.
MCLR/VPP
4
4
I
ST
Master clear (reset) input/programming voltage input. This
pin is an active low reset to the device. Voltage on the
MCLR/VPP pin must not exceed VDD to avoid unintended
entering of programming mode.
OSC1/CLKIN
16
15
18
17
I
ST
—
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.
VDD
VSS
14
5
15,16
5,6
P
P
—
—
Positive supply for logic and I/O pins.
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
1998 Microchip Technology Inc.
Preliminary
DS30453B-page 11
MICROCHIP [ MICROCHIP ]
