UM980eb User Manual
14
UM980 Peripheral Design
UC-08-M32 EN R1.0
Figure 5-2 Markings on the Right of the LED Indicators
6
UM980 Peripheral Design
TVS anti-surge protection is added at the input of the UM980 module. ESD protection is
added at all pins.
Use large and small VCC filter capacitors together, with a total capacitance greater than
30 uF.
Add series resistors at the IO pins for the convenience of debugging.
VCCIN powers the UM980 module only. R33 is a large-size resistor (with high rated
power) to ensure the current capability. In the figure below, a 0805 resistor is used.
Removing R33, connecting a power supply wire at TP1 and a ground wire at TP3 (as
shown in Figure 7-1), you can use an external power to supply the module. This method
can be used to measure the input voltage and current of UM980.
