
2010-2012 Microchip Technology Inc.
DS39977F-page 45
PIC18F66K80 FAMILY
2.0
GUIDELINES FOR GETTING
STARTED WITH PIC18FXXKXX
MICROCONTROLLERS
2.1
Basic Connection Requirements
Getting started with the PIC18F66K80 family family of
8-bit microcontrollers requires attention to a minimal
set of device pin connections before proceeding with
development.
The following pins must always be connected:
All VDD and VSS pins
All AVDD and AVSS pins, regardless of whether or
not the analog device features are used
MCLR pin
ENVREG (if implemented) and VCAP/VDDCORE pins
)
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
OSCI and OSCO pins when an external oscillator
source is used
Additionally, the following pins may be required:
VREF+/VREF- pins are used when external voltage
reference for analog modules is implemented
The minimum mandatory connections are shown in
FIGURE 2-1:
RECOMMENDED
MINIMUM CONNECTIONS
Note:
The AVDD and AVSS pins must always be
connected, regardless of whether any of
the analog modules are being used.
PIC18FXXKXX
V
DD
V
SS
VDD
VSS
VDD
AV
DD
AV
SS
V
DD
V
SS
C1
R1
VDD
MCLR
VCAP/VDDCORE
R2
ENVREG
(1)
C7(2)
C2(2)
C3(2)
C4(2)
C5(2)
C6(2)
Key (all values are recommendations):
C1 through C6: 0.1
F, 20V ceramic
R1: 10 k
R2: 100 to 470
Note
1:
for
explanation of ENVREG pin connections.
2:
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.
(1)