PIC16C5X
TABLE 3-2:
Name
RA0
RA1
RA2
RA3
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
T0CKI
MCLR
OSC1/CLKIN
OSC2/CLKOUT
PINOUT DESCRIPTION
-
PIC16C55s, PIC16C57s, PIC16CR57s
Description
Bi-directional I/O port
DIP, SOIC SSOP I/O/P Input
No.
No. Type Levels
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
1
28
27
26
5
6
7
8
9
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
2
28
27
26
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
I/O
I/O
I/O
I/O
I
I
I
O
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
TTL
ST
ST
ST
—
Bi-directional I/O port
Bi-directional I/O port
V
DD
2
3,4
P
—
V
SS
4
1,14
P
—
N/C
3,5
—
—
—
Legend: I = input, O = output, I/O = input/output,
P = power, — = Not Used,
TTL = TTL input, ST = Schmitt Trigger input
Clock input to Timer0. Must be tied to V
SS
or V
DD
if not in use
to reduce current consumption.
Master clear (reset) input. This pin is an active low reset to the
device.
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.
Positive supply for logic and I/O pins.
Ground reference for logic and I/O pins.
Unused, do not connect
DS30453B-page 12
Preliminary
©
1998 Microchip Technology Inc.
MICROCHIP [ MICROCHIP TECHNOLOGY ]
