DV164121 Microchip Technology, DV164121 Datasheet - Page 29

• Manufacturer Part Number: DV164121
• Description: KIT PICKIT 2 DEBUG EXPRESS
• Manufacturer: Microchip Technology
• Series: PICkit™ 2r
• Type: Microcontrollerr

Specifications of DV164121

• Contents: Board, PICkit™ 2 Programmer, Cable, CD
• Processor To Be Evaluated: PIC family
• Data Bus Width: 8 bit, 16 bit, 32 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: PIC Micro® MCU
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

2.13
© 2008 Microchip Technology Inc.
PICKIT 2 CALIBRATION AND UNIT ID
FIGURE 2-18:
2.12.1
This features allows the PICkit 2 Programmer application to automatically import a hex
file and write it to a connected device when the hex file is updated; for example, on a
new firmware build.
To use this feature, click Auto Import Hex + Write Device. This will bring up an Import
Hex file dialog defaulting to the first hex file in the file history under the File menu. After
selecting a file, it will be written to the device. The PICkit 2 Programmer application will
now monitor the selected hex file for updates. When the file has been updated (has a
newer time stamp), the application will automatically re-import the hex file and write to
the target device.
While this feature is enabled, other programming operations are disabled. The Auto
Import Hex + Write Device button will remain depressed while this feature is active.
To stop using this feature, click Auto Import Hex + Write Device again.
If an error is encountered during hex file importing or device programming, the
application will automatically exit this feature mode.
2.12.2
When clicked, this button will read the target device and open an Export Hex File
dialog.
The PICkit 2 V
the USB voltage of the port it is connected to. A Unit ID string may also be assigned to
a PICkit 2 unit to provide unique identification.
2.13.1
Calibration allows greater accuracy both in the V
PICkit 2, and the voltage detected on a powered target and reported in the software.
The calibration is stored in the PICkit 2 unit nonvolatile memory, so the unit will remain
calibrated even when used from within MPLAB IDE.
It is important to note, however, that as the calibration is dependent on the USB voltage,
moving the PICkit 2 unit to a different USB port, to or from a USB hub or to another
computer port may invalidate the calibration.
To calibrate the PICkit 2 unit, a multi-meter or other means of accurately measuring
voltages is required. Disconnect the PICkit 2 unit from the target and select
Tools>Calibrate Vdd & Set Unit ID… to bring up the calibration wizard. Follow the steps
in the wizard to complete the calibration process.
Note:
Auto Import Hex + Write Device Button
Read Device + Export Hex File Button
Calibrating the PICkit 2 V
Even when calibrated, the PICkit 2 V
USB port voltage. PICkit 2 is unable to provide a V
a Schottky diode drop below the USB port voltage. This voltage can be as
low as 4.2 Volts, especially in laptop computer ports.
DD
may be calibrated to account for variations in the unit hardware and
AUTOMATING BUTTONS
DD
DD
DD
voltage is limited by the available
voltage supplied to the target from
DD
voltage greater than
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