Datasheet

 1997-2013 Microchip Technology Inc. Preliminary DS30453E-page 11
PIC16C5X
TABLE 3-1: PINOUT DESCRIPTION - PIC16C54, PIC16CR54, PIC16C56, PIC16CR56, PIC16C58,
PIC16CR58
Pin Name
Pin Number Pin Buffer
Description
DIP SOIC SSOP
Type Type
RA0
RA1
RA2
RA3
17
18
1
2
17
18
1
2
19
20
1
2
I/O
I/O
I/O
I/O
TTL
TTL
TTL
TTL
Bi-directional I/O port
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
6
7
8
9
10
11
12
13
6
7
8
9
10
11
12
13
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
Bi-directional I/O port
T0CKI 3 3 3 I ST Clock input to Timer0. Must be tied to V
SS or VDD, if not in
use, to reduce current consumption.
MCLR
/VPP 4 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 unin-
tended entering of Programming mode.
OSC1/CLKIN 16 16 18 I ST Oscillator crystal input/external clock source input.
OSC2/CLKOUT 15 15 17 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.
V
DD 14 14 15,16 P — Positive supply for logic and I/O pins.
VSS 5 5 5,6 P — 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