User manual

MPLAB
®
X PICkit™ 3 User’s Guide
DS52116A-page 62  2013 Microchip Technology Inc.
A.4 USB PORT/POWER
The PICkit 3 In-Circuit Debugger/Programmer is connected to the host PC via a mini
Universal Serial Bus (USB) port, version 2.0 compliant. The USB connector is located
on the top of the pod.
The system is capable of reloading the firmware via the USB interface.
System power is derived from the USB interface. The debugger is classified as a high
power system per the USB specification, and requires slightly more than 100 mA of
power from the USB to function in all operational modes (debugger/programmer).
Cable Length – The PC-to-debugger cable length for proper operation is shipped in
the debugger kit.
Powered Hubs – If you are going to use a USB hub, make sure it is self-powered. Also,
USB ports on PC keyboards do not have enough power for the debugger to operate.
PC Hibernate/Power-Down Modes – Disable the Hibernate or other Power Saver
modes on your PC to ensure proper USB communications with the debugger.
A.5 PICKIT 3 IN-CIRCUIT DEBUGGER/PROGRAMMER
The debugger consists of a main board enclosed in the casing with a USB connector
and a single in-line connector. On the debugger enclosure are indicator lights (LEDs).
A.5.1 Main Board
This component has the interface processor with integrated USB 2.0 interface capable
of SPI serial EE for programming into the on-board Flash emulation device and LED
indicators.
A.5.2 Indicator Lights (LEDs)
The indicator lights have the following significance.
Note: The PICkit 3 In-Circuit Debugger/Programmer is powered through its USB
connection. The target board is powered from its own supply. Alternatively,
the PICkit 3 can power it only if the target consumes less than 30 mA.
LED Color Description
Power Green Lit when power is first applied or when target is connected.
Active Blue Lit when the PICkit™ 3 has established communication with the
PC or sending/receiving commands.
Status Green Lit when the debugger is operating normally – standby.
Orange Lit when an operation is busy.
Red Lit when the debugger has failed.