sparkfun DEV-17272 Hook-Up Manual page 14

PDM DAT Connects the data signal from on-
board microphone to AUD_LRCLK
(MicroMod Pad 52).
PDM CLK Connects the clock signal from the
on-board microphone to AUD_BCLK
(MicroMod Pad 50).
2
I C A dual jumper that ties SDA & SCL
on the primary I C/Qwiic bus to 3.3V
via a pair of 2.2kΩ resistors.
2
SARA I C A dual jumper that ties the SARA's
SDA and SCL lines to 3.3V via a pair
of 2.2kΩ
CIPO Ties SPI CIPO/SDI to 3.3V via a
2.2kΩ resistor.
EXT INT / A dual jumper used to select which
GPIO3 signal is connected to MicroMod G5.
DSR A dual jumper used to control the
direction of DSR from input to output .
MEAS Allows users to measure the current
draw from the 3.3V power rail.
VIN/3 Completes the VIN/3 voltage divider
circuit.
3V3 (LED) Connects the anode of the 3.3V LED
to 3.3V via a 1kΩ resistor.
2
CLOSED On the RP2040 Processor, AUD_LRCLK is
shared with CTS1. Open this jumper to use
the CTS connection on the SARA.
CLOSED On the RP2040 Processor, AUD_BCLK is
shared with RTS1. Open this jumper to use
the RTS connection on the SARA.
CLOSED Open both jumpers to disconnect the pull-
ups.
CLOSED Open both jumpers to disable the pull-ups.
CLOSED Open to disconnect the pull-up. Opening
this jumper may be advantageous for very
low power applications where Processors
like the Artemis have internal pull-ups
which can be used instead.
SEE By default, this jumper is set so if the G5 /
NOTE SARA INT jumper is closed, G5 is
connected to the SARA EXT INT I/O pin.
Switch this jumper to the opposite side to
connect G5 to the SARA GPIO3 pin.
SEE By default, this jumper sets DSR as an
NOTE input. Switching it sets DSR as an output
so users can use dual-UART
communication modes on the SARA.
CLOSED Open this jumper and complete the circuit
using a digital multimeter to measure
current draw on the 3.3V power rail.
CLOSED Open the jumper to disable the VIN/3
voltage divider circuit. Disabling this can be
useful in very low power applications to
reduce total current draw.
CLOSED Open the jumper to disable the 3.3V LED
to reduce total current draw of the
MicroMod circuit.