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PIC18F44J50-I Datasheet, PDF (29/562 Pages) Microchip Technology – 28/44-Pin, Low-Power, High-Performance USB Microcontrollers | |||
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PIC18F46J50 FAMILY
2.0 GUIDELINES FOR GETTING
STARTED WITH PIC18FJ
MICROCONTROLLERS
2.1 Basic Connection Requirements
Getting started with the PIC18F46J50 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
(see Section 2.2 âPower Supply Pinsâ)
⢠All AVDD and AVSS pins (if present), regardless of
whether or not the analog device features are used
(see Section 2.2 âPower Supply Pinsâ)
⢠MCLR pin
(see Section 2.3 âMaster Clear (MCLR) Pinâ)
⢠VCAP/VDDCORE pin
(see Section 2.4 âVoltage Regulator Pins
(VCAP/VDDCORE)â)
These pins must also be connected if they are being
used in the end application:
⢠PGC/PGD pins used for In-Circuit Serial
Programming⢠(ICSPâ¢) and debugging purposes
(see Section 2.5 âICSP Pinsâ)
⢠OSCI and OSCO pins when an external oscillator
source is used
(see Section 2.6 âExternal Oscillator Pinsâ)
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.
FIGURE 2-1:
RECOMMENDED
MINIMUM CONNECTIONS
VDD
C2(2)
R1
R2
C1
C6(2)
MCLR
(3) (1)
VUSB
VCAP/VDDCORE
PIC18FXXJXX
VSS
VDD
VDD
VSS
C7
C3(2)
C5(2)
C4(2)
Key (all values are recommendations):
C1 through C6: 0.1 ïF, 20V ceramic
C7: 10 ïF, 6.3V or greater, tantalum or 10v or greater
ceramic
R1: 10 kâ¦
R2: 100⦠to 470â¦
Note 1:
2:
3:
See Section 2.4 âVoltage Regulator Pins
(VCAP/VDDCORE)â for explanation of
VCAP/VDDCORE pin connections.
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.
See Section 22.2.2.1 âInternal Transceiverâ.
ï£ 2011 Microchip Technology Inc.
DS39931D-page 29
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