Microchip Technology ARD00330 Scheda Tecnica
2010 Microchip Technology Inc.
DS39979A-page 21
PIC18F87J72 FAMILY
2.0
GUIDELINES FOR GETTING
STARTED WITH PIC18FJ
MICROCONTROLLERS
STARTED WITH PIC18FJ
MICROCONTROLLERS
2.1
Basic Connection Requirements
Getting started with the PIC18F87J72 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 V
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 V
DD
and V
SS
pins
• All AV
DD
and AV
SS
pins, regardless of whether or
not the analog device features are used
(see Section 2.2 “Power Supply Pins”)
(see Section 2.2 “Power Supply Pins”)
• MCLR pin
• ENVREG (if implemented) and V
CAP
/V
DDCORE
pins
)”)
These pins must also be connected if they are being
used in the end application:
• PGC/PGD pins used for In-Circuit Serial
used in the end application:
• PGC/PGD pins used for In-Circuit Serial
Programming™ (ICSP™) and debugging purposes
(see Section 2.5 “ICSP Pins”)
(see Section 2.5 “ICSP Pins”)
• OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.6 “External Oscillator Pins”)
(see Section 2.6 “External Oscillator Pins”)
Additionally, the following pins may be required:
• V
• V
REF
+/V
REF
- pins are used when external voltage
reference for analog modules is implemented
The minimum mandatory connections are shown in
Figure 2-1.
Figure 2-1.
FIGURE 2-1:
RECOMMENDED MINIMUM
CONNECTIONS
CONNECTIONS
Note:
The AV
DD
and AV
SS
pins must always be
connected, regardless of whether any of
the analog modules are being used.
the analog modules are being used.
PIC18FXXJXX
V
DD
V
SS
V
DD
V
SS
V
SS
V
DD
AV
DD
AV
SS
V
DD
V
SS
C1
R1
V
DD
MCLR
V
CAP
/V
DDCORE
R2
ENVREG
(1)
C7
C2
(2)
C3
(2)
C4
(2)
C5
(2)
C6
(2)
Key (all values are recommendations):
C1 through C6: 0.1
C1 through C6: 0.1
F, 20V ceramic
C7: 10
F, 6.3V or greater, tantalum or ceramic
R1: 10 kΩ
R2: 100Ω to 470Ω
Note 1:
R2: 100Ω to 470Ω
Note 1:
)” for
explanation of ENVREG pin connections.
2:
The example shown is for a PIC18F device
with five V
with five V
DD
/V
SS
and AV
DD
/AV
SS
pairs.
Other devices may have more or less pairs;
adjust the number of decoupling capacitors
appropriately.
adjust the number of decoupling capacitors
appropriately.
(1)