
2009 Microchip Technology Inc.
DS39663F-page 27
PIC18F87J10 FAMILY
2.0
GUIDELINES FOR GETTING
STARTED WITH PIC18FJ
MICROCONTROLLERS
2.1
Basic Connection Requirements
Getting started with the PIC18F87J10 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 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.
PIC18FXXJXX
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
C2(2)
C3(2)
C4(2)
C5(2)
C6(2)
Key (all values are recommendations):
C1 through C6: 0.1
μF, 20V ceramic
C7: 10
μF, 6.3V or greater, tantalum or ceramic
R1: 10 k
R2: 100 to 470
Note 1:
explanation of ENVREG pin connections.
2:
The example shown is for a PIC18FJ 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)