PIC18F2331/2431/4331/4431
FIGURE 2-1:
RECOMMENDED
MINIMUM CONNECTIONS
2.0
2.1
GUIDELINES FOR GETTING
STARTED WITH PIC18F
MICROCONTROLLERS
(1)
C2
VDD
Basic Connection Requirements
Getting started with the PIC18F2331/2431/4331/4431
family of 8-bit microcontrollers requires attention to a
minimal set of device pin connections before
proceeding with development.
R1
R2
MCLR
VDD
C1
(1)
The following pins must always be connected:
PIC18FXXXX
C3
VSS
• All VDD and VSS pins
VSS
VDD
(see Section 2.2 “Power Supply Pins”)
(1)
C6
• All AVDD and AVSS pins, regardless of whether or
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
• MCLR pin
(see Section 2.3 “Master Clear (MCLR) Pin”)
(1)
(1)
C4
C5
These pins must also be connected if they are being
used in the end application:
• PGC/PGD pins used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes
(see Section 2.4 “ICSP Pins”)
Key (all values are recommendations):
C1 through C6: 0.1 µF, 20V ceramic
R1: 10 kΩ
• OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.5 “External Oscillator Pins”)
R2: 100Ω to 470Ω
Note 1: The example shown is for a PIC18F device
with five VDD/VSS and AVDD/AVSS pairs.
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
Additionally, the following pins may be required:
• VREF+/VREF- pins are used when external voltage
reference for analog modules is implemented
Note:
The AVDD and AVSS pins must always be
connected, regardless of whether any of
the analog modules are being used.
The minimum mandatory connections are shown in
Figure 2-1.
2010 Microchip Technology Inc.
DS39616D-page 25
MICROCHIP [ MICROCHIP ]
