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PIC18F4321 Datasheet(PDF) 14 Page - Microchip Technology

Part # PIC18F4321
Description  28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
PDF  396 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F4321 Datasheet(HTML) 14 Page - Microchip Technology

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PIC18F4321 FAMILY
DS39689E-page 12
Preliminary
© 2007 Microchip Technology Inc.
TABLE 1-2:
PIC18F2221/2321 PINOUT I/O DESCRIPTIONS
Pin Name
Pin Number
Pin
Type
Buffer
Type
Description
SPDIP,
SOIC,
SSOP
QFN
MCLR/VPP/RE3
MCLR
VPP
RE3
126
I
P
I
ST
ST
Master Clear (input) or programming voltage (input).
Master Clear (Reset) input. This pin is an active-low
Reset to the device.
Programming voltage input.
Digital input.
OSC1/CLKI/RA7
OSC1
CLKI
RA7
96
I
I
I/O
Analog
Analog
TTL
Oscillator crystal or external clock input.
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/CLKI,
OSC2/CLKO pins.)
General purpose I/O pin.
OSC2/CLKO/RA6
OSC2
CLKO
RA6
10
7
O
O
I/O
—
—
TTL
Oscillator crystal or clock output.
Oscillator crystal output. Connects to crystal or resonator
in Crystal Oscillator mode.
In RC, EC and INTIO modes, OSC2 pin outputs CLKO
which has one-fourth the frequency of OSC1 and denotes
the instruction cycle rate.
General purpose I/O pin.
Legend: TTL = TTL compatible input
CMOS = CMOS compatible input or output
ST = Schmitt Trigger input with CMOS levels
I
= Input
P = Power
I2C = ST with I2C™ or SMB levels
O
= Output
Note 1:
Default assignment for CCP2 when Configuration bit, CCP2MX, is set.
2:
Alternate assignment for CCP2 when Configuration bit, CCP2MX, is cleared.



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