DVR datasheet(29/416 Pages) MICROCHIP

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DS30010118D-page 29

PIC24FJ256GA705 FAMILY

2.0

GUIDELINES FOR GETTING

STARTED WITH 16-BIT

MICROCONTROLLERS

2.1

Basic Connection Requirements

Getting started with the PIC24FJ256GA705 family of

16-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 “Power Supply Pins”)

•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”)

•VCAP pin

(see Section 2.4 “Voltage Regulator Pin (VCAP)”)

These pins must also be connected if they are being

used in the end application:

• PGCx/PGDx pins used for In-Circuit Serial

Programming™ (ICSP™) and debugging purposes

(see Section 2.5 “ICSP Pins”)

• OSCI and OSCO pins when an external oscillator

source is used

(see Section 2.6 “External Oscillator Pins”)

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.

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.

PIC24FJXXX

VDD

VSS

VDD

MCLR

VCAP

C2(2)

C3(2)

C4(2)

C5(2)

C6(2)

Key (all values are recommendations):

C1 through C6: 0.1

F, 50V ceramic

C7: 10

F, 16V or greater, ceramic

R1: 10 kΩ

R2: 100Ω to 470Ω

Note 1:

See Section 2.4 “Voltage Regulator Pin

(VCAP)” for an explanation of voltage

regulator pin connections.

The example shown is for a PIC24F device

with five VDD/VSS and AVDD/AVSS pairs.

Other devices may have more or less pairs;

adjust the number of decoupling capacitors

appropriately.

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