Note:
Note that the CS pin on the MicroMod Main Board - Single is on
Processor Board's
D1
while the
MicroMod Main Board - Double is on the
Processor Board's
G4
.
LEDs
There are three LEDs on the board:
VIN
- The VIN LED lights up to indicate when power available from the USB connector.
3V3
- The 3V3 LED lights up to indicate when there is a 3.3V available after power is regulated down from
the USB connector or LiPo battery.
CHG
- The on-board yellow CHG LED can be used to get an indication of the
charge status
of your battery.
Below is a table of other status indicators depending on the state of the charge IC.
Charge State
LED status
No Battery
Floating (should be OFF, but may flicker)
Shutdown
Floating (should be OFF, but may flicker)
Charging
ON
Charge Complete
OFF
Jumpers
If this is your first time working with jumpers, check out the How to Work with Jumper Pads and PCB
Traces tutorial for more information.
The following five jumpers are included on both the Single and Double Main Boards.
MEAS
- By default, the jumper is closed and located on the top side of the board. This jumper is used to
measure your system's current consumption. You can cut this jumper's trace and connect the PTHs to a
ammeter/multimeter to probe the output from the 3.3V voltage regulator. Check out our How to Use a
Multimeter tutorial for more information on measuring current.