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12/21/2018
JP4/JP5 pullups/pulldowns
Default configuration is with the shorting blocks loaded on
pins 1 and 2, which results in pullup configuration.
Shorting pins 2 and 3 results in pulldown operation. Users
may choose to remove shorting blocks entirely if no
pullup/pulldown settings are desired.
JP7 Power Select
Jumper
Default power
select is with the
shorting block
connecting the two
pins directly next to
VBUS, providing
power from the
USB connector. If
external power is
desired, connect the
two pins nearest the
external power
screw terminal labeled VIN.
5 Power Supply
The DP32 is designed to be powered either via USB or from an external power supply. Only one supply should be selected at a time.
The DP32 has a single voltage regulator mounted on the underside which regulates either 5V from USB to 3.3V, or a maximum of 15V
external voltage to 3.3V. The 3.3V regulator is a Microchip MCP1703. This regulator is rated for a maximum output current of 250mA.
This regulator has internal short circuit protection and thermal protection. It will get noticeably warm when the current consumed by the
VCC3V3 bus is close to the 250mA maximum.
The internal USB circuit on the PIC32MX250F128B requires 5VDC to operate. Do not attempt to power the USB circuitry with the
external power screw terminal, unless it is a regulated 5V external power supply.
6 5V Compatibility
The PIC32 microcontroller operates at 3.3V. There are two issues to consider when dealing with 5V compatibility for 3.3V logic. The
first is protection of 3.3V inputs from damage caused by 5V signals. The second is whether the 3.3V output is high enough to be
recognized as a logic high value by a 5V input.
https://reference.digilentinc.com/chipkit_dp32/refmanual
chipKIT DP32 Reference Manual [Reference.Digilentinc]
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