Microchip Developer Explorer 16/32 User Manual page 10

Explorer 16/32 Development Board User's Guide - Developer Help
host).
In non-USB applications, the jumper caps may be removed altogether, so as to
minimize interference on the P33_CC1 and P32_CC2 nets. However, if the
application wishes to obtain USB bus power from the USB Type-C connector, the
jumpers should still be left capped in the device mode positions (ex: cap pins 2-3),
as USB Type-C hosts will not necessarily enable the 5 V VBUS power supply to the
USB port, until it first confirms the presence of an attached device.
J33 – When capped, this jumper allows the PIM microcontroller to measure/detect
USB embedded host over current or short circuit conditions on either the USB
female-A or Type-C connectors. For USB embedded host applications wishing to
detect these conditions, the jumper should be capped and the P25_ANA_USBOC
net should be sampled with an ADC. For all other applications (non-USB, USB
device only, or USB embedded host – not requiring VBUS over current detection),
the jumper may be left open to allow the PIM pin 25 to be used for other purposes.
J37 – This jumper can be used to connect or disconnect the MCP2221A TX signal
from the P49_RXB net, which normally goes to the PIM microcontroller's RX pin, as
well as the mikroBUS B and PICtail Plus interfaces. This jumper should be capped,
whenever the MCP2221A will be used to interface with the PIM microcontroller UART
(or to a UART based peripheral attached via mikroBUS interface B or the PICtail Plus
interface).
J38 – This jumper can be used to connect or disconnect the MCP2221A RX signal
from the P50_TXB net, which normally goes to the PIM microcontroller's TX pin, as
well as the mikroBUS B and PICtail Plus interfaces. This jumper should be capped,
whenever the MCP2221A will be used to interface with the PIM microcontroller UART
(or to a UART based peripheral attached via mikroBUS interface B or the PICtail Plus
interface).
J39 – This is can be used to disconnect the temperature sensor (U4) output from the
PIM microcontroller (P21_TEMP net). By default, a trace (on the bottom of the PCB)
shorts the two pins of J39, and the temperature sensor will always be connected to
the microcontroller. If desired, the trace can be cut (see silk text on bottom of PCB)
to disconnect the POT, and a 2-pin jumper may optionally be installed to allow user
re-connection/disconnection of the sensor.
J41 – When capped, this jumper connects the MCP2221A I C serial data (SDA) pin
to the P56_SDA net which goes to the PIM microcontroller, the mikroBUS A/B
interfaces, and to the PICtail Plus interface. Opening this jumper disconnects the
SDA pull up resistor and MCP2221A from the P56_SDA net.
J42 – When capped, this jumper connects the MCP2221A I C serial clock (SCL) pin
to the P57_SCL net which goes to the PIM microcontroller, the mikroBUS A/B
interfaces, and to the PICtail Plus interface. Opening this jumper disconnects the
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