Ublox EVK-NINA-B1, Руководство пользователя

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EVK-NINA-B1 - User guide
UBX-15028120 - R11 Product description Page 12 of 21
Figure 9: Placement of R4 and R6 (10
Ω
resistors)
1.7.4.1 Current measurement with ampere-meter
Remove the jumpers on J15 and J6. Remove the 10
Ω
resistors R4 and R6 and connect the ampere-
meter in series between the pins 1 and 2 of the J15 pin header. This will give the NINA-B1 current
consumption reading on the ampere-meter.
1.7.4.2 Current measurement with Oscilloscope
Remove the 10
Ω
resistor on R4. Remove the jumpers on J15 and J6 and connect an oscilloscope to
pins 1 and 2 of the J15 pin header. Then, this will display the voltage drop over the R6 resistor. Current
consumption will be proportional to the voltage drop.
If R6=1
Ω
, then 1 mV voltage drop equals 1 mA of current. If R6=10
Ω
, then 10 mV voltage drop equals
1 mA of current.
⚠
The USB interface, MCU interface, and the LEDs should not be connected during current
consumption measurement.
1.8 Software debug options
You can debug the software using the following two options in EVK-NINA-B1:
 Onboard debug solution available on the USB connector

Using an external debugger connected to J12 connector
An external debugger connected to the J12 connector is useful when powering the evaluation board
with the CR2032 coin cell battery, or through the external power supply connector J5. It could also be
useful in a scenario where the debug MCU interface has been disconnected from the NINA-B1 module
using the jumpers on J9 header. The SEGGER J-Link software [5] is required to debug using the
onboard J-Link hardware on the EVK-NINA-B1.