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PIC18C242T Datasheet(PDF) 8 Page - Microchip Technology

Part # PIC18C242T
Description  High-Performance Microcontrollers with 10-Bit A/D
Download  296 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18C242T Datasheet(HTML) 8 Page - Microchip Technology

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PIC18CXX2
DS39026B-page 8
Preliminary
© 7/99 Microchip Technology Inc.
TABLE 1-2:
PIC18C2X2 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number
Pin
Type
Buffer
Type
DIP
SOIC
Description
MCLR/VPP
MCLR
VPP
11
I
P
ST
Master clear (reset) input. This pin is an active low reset
to the device.
Programming voltage input.
NC
These pins should be left unconnected.
OSC1/CLKI
OSC1
CLKI
99
I
I
ST
CMOS
Oscillator crystal input or external clock source input.
ST buffer when configured in RC mode. CMOS otherwise.
External clock source input. Always associated with
pin function OSC1. (See related OSC1/CLKIN,
OSC2/CLKOUT pins).
OSC2/CLKO/RA6
OSC2
CLKO
RA6
10
10
O
O
I/O
TTL
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.
General Purpose I/O pin.
PORTA is a bi-directional I/O port.
RA0/AN0
RA0
AN0
22
I/O
I
TTL
Analog
Digital I/O.
Analog input 0.
RA1/AN1
RA1
AN1
33
I/O
I
TTL
Analog
Digital I/O.
Analog input 1.
RA2/AN2/VREF-
RA2
AN2
VREF-
44
I/O
I
I
TTL
Analog
Analog
Digital I/O.
Analog input 2.
A/D Reference Voltage (Low) input.
RA3/AN3/VREF+
RA3
AN3
VREF+
55
I/O
I
I
TTL
Analog
Analog
Digital I/O.
Analog input 3.
A/D Reference Voltage (High) input.
RA4/T0CKI
RA4
T0CKI
66
I/O
I
ST/OD
ST
Digital I/O. Open drain when configured as output.
Timer0 external clock input.
RA5/AN4/SS/LVDIN
RA5
AN4
SS
LVDIN
77
I/O
I
I
I
TTL
Analog
ST
Analog
Digital I/O.
Analog input 4.
SPI Slave Select input.
Low Voltage Detect Input.
RA6
See the OSC2/CLKO/RA6 pin.
Legend: TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels
I = Input
O = Output
P = Power
OD = Open Drain (no P diode to VDD)


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