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Integrated Development Environment
In-Circuit DeBuggerUsing
1
2
3
Install the Latest Software
Install the MPLAB®X IDE software onto your computer by downloading it from
www.microchip.com/mplabx. Launch the application.
Configure USB Communications
The PICkit 3 uses generic USB drivers that are installed automatically. You do not
need to do anything.
Connect to Target and Power
1. Attach the PICkit 3 to the computer using the USB cable.
2. Attach the communications cable between the debugger and target board.
3. Connect power to the target board.
Typical Debugger System – Device With On-Board Debug Circuitry:
Ta rget Device
Power
mini-USB from
computer
Target Board
Alternate Debugger System – ICE Device:
Standard
Header
Device-ICE
Adapter
ADDITIONAL INFORMATION
Circuitry and Connector Pinouts
Target Connector Pinout
Pin 1 Indicator
*Target device must be running
with an oscillator for the debugger
to function as a debugger.
**If the device has AVDD and AVSS
lines, they must be connected for
the debugger to operate.
Pin
1
2
3
4
5
6
*Reserved for future use. *Reserved for future use.
Correct
Target VDD (tVDD)
XTAL*
VPP/MCLR
Application
Target
AVDD**
AV
SS**
Target Application PC Board
Signal
50 kΩ
Typical
PP
2
1
5
4
3
MCLR/V
VDD Target
VSS Ground
PGD (ICSPDAT)
PGC (ICSPCLK)
Do not connect*
DD
V
PGC
PGD
Device
VSS
PICkit 3 Connector Pinout
Pin
1
2
3
4
5
6
PICkit 3
Internal Circuitry (simplified)
tVDD
4.7 kΩ
4.7 kΩ
Signal
MCLR/V
VDD Target
VSS Ground
PGD (ICSPDAT)
PGC (ICSPCLK)
Do not connect*
VPP
tVDD
tVDD
tVDD
tVDD
PP
Target VDD
(tVDD) is used
to power the
Input/Output
drivers in
PICkit 3
programmer/
debugger
4
mini-USB from
computer
Transition Socket
Targ et Board
Power
Create, Build and Run the Project
1. Select and install the language tools (compiler, assembler, etc.) for developing
your code. See the www.microchip.com web site for more choices.
2. Use the New Project wizard (File>New Project) to create a project, or open an
existing project (File>Open Project).
3. Configure the debugger by right clicking on the main project and selecting
“Properties.” Click on “PICkit 3” for options.
4. Configure your language tools in the Properties dialog by clicking the language tool
name for options. Click OK when done.
5. Check that the configuration bits in your code match the Recommended Settings
listed on this poster.
6. To execute your code in Debug mode, perform a debug run by selecting
Debug>Debug Project. A debug run will build the project, program the target with
the image and debug executive, and start a debug session.
OR
To execute your code in Non-Debug (release) mode, perform a run by selecting
Run>Run Project. A run will build the project, program the target with the image
and run the device.
To hold a device in Reset after programming, use the Hold in Reset icon in the
toolbar instead of using Run Project.
Recommended Settings
COMPONENT SETTING
Oscillator • OSC bits set properly
• Running
Power Supplied by target
WDT Disabled (device dependent)
Code-Protect Disabled
Table Read Protect Disabled
LVP Disabled
BOD V
JTAG Disabled
AVDD and AVSS Must be connected
PGCx/PGDx Proper channel selected, if
applicable
Programming V
programming specs
Note: See the PICkit 3 online help for more information.
The Microchip name and logo, the Microchip logo, MPLAB and PIC
are registered trademarks of Microchip Technology Incorporated in
the U.S.A. and other countries. PICkit is a trademark of Microchip
Technology Incorporated in the U.S.A. and other countries.
© 2014, Microchip Technology Incorporated, All Rights Reserved. 6/14
DD > BOD VDD min
DD voltage levels meet
DS50002010Bwww.microchip.com
Target Circuit Design Precautions
Incorrect
Target V
DD (tVDD)
V
DD
VPP/MCLR
XTAL*
V
DD
PGC
PGD
Device
Application
Target
AVDD**
AV
SS**
Target Application PC Board
SS
V
• Do not use greater than 100 µF capacitance on VDD: depending
on the overall load, it will prevent the target from powering quickly
when PICkit 3 is the source of power.
• Do not use capacitors on MCLR: they will prevent fast
2
transitions of V
• Do not use pull-ups on PGC/PGD: they will divide the voltage
1
5
4
3
levels since these lines have 4.7 kΩ pull-down resistors in PICkit 3.
• Do not use multiplexing on PGC/PGD: they are dedicated for
PP.
communications to PICkit 3.
• Do not use capacitors on PGC/PGD: they will prevent fast
transitions on data and clock lines during programming and debug
communications.
• Do not use diodes on PGC/PGD: they will prevent bidirectional
communication between PICkit 3 and the target PIC®MCU.
• Do not exceed recommended cable lengths: refer to the Hardware
Specification section of the PICkit 3 online help or user’s guide for
acceptable cable lengths.
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