DV164121 Microchip Technology, DV164121 Datasheet - Page 33

• 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

3.4
© 2008 Microchip Technology Inc.
V
DD
During ICSP programming, the device needs to be powered in accordance with the
device specification. Typically, the device supply voltage is connected to the application
circuit supply voltage. The application circuit can be powered by the PICkit 2 or exter-
nally. There are a few precautions that need to be observed in the situations covered
in the following three sections.
3.4.1
The PICkit 2 supply voltage may set between the maximum and minimum voltages
allowed by the device programming specification, unless the minimum is below +2.5V.
Be sure to set the voltage box to the appropriate voltage before programming the
device or turning on V
3.4.2
The PICkit 2 may be used with application circuits powered externally between +5.0V
and +2.5V.
3.4.3
Some devices use a Bulk Erase function to erase program memory, data EEPROM
memory, ID locations, and Configuration bits. Typically, the Bulk Erase function
requires a supply voltage (V
specification for device specific requirements).
This voltage range can be a problem if the application circuit is designed to operate at
a different supply voltage range. In order to Bulk Erase the device, the application
circuit needs to take into consideration the Bulk Erase voltage requirement while
protecting any voltage sensitive circuitry.
If the application circuit V
will warn the user before attempting to erase the device.
The USB port current limit is set to 100 mA. If the target plus the programmer
exceeds this current limit, the USB port may turn off. The target may be powered
externally if more power is required.
Note:
The application circuit is powered by the PICkit 2
The application circuit is powered externally
Bulk Erase is used
Current draw should be limited to 25 mA when using the programmer to
power the application circuit. Ensure that the application circuit does not
slow the V
DD
DD
.
rise time to longer than 500 μs.
DD
is below the minimum required for the Bulk Erase, a dialog
DD
) of 4.5 to 5.5 Volts (refer to the device programming
CAUTION
DS51553E-page 29