Nordic ID NUR-05WL2, Implementation Manual

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2013 ‐ 09 ‐ 27
NUR ‐ 05WL2 Implementation Guide v1.1
This pin is used for module UART input signal. Logic level is 3.3V. If UART is used for communication
the pin should be connected to the Host MCU serial TX port.
Signal name: TX Pin number(s): 9
This pin is used for module UART output signal. Logic level is 3.3V. If UART is used for communication
the pin should be connected to the Host MCU serial RX port.
Signal name: USB_DN Pin number(s): 10
This pin is used as USB_D ‐ device port. It is advised to use external ESD protection component if
connected to user accessible USB connector.
Signal name: USB_DP Pin number(s): 11
This pin is used as USB_D+ device port. It is advised to use external ESD protection component if
connected to user accessible USB connector.
Signal name: USB_DET Pin number(s): 12
This pin is only used for USB connection detection. It is advised to use external ESD protection
component if connected to user accessible USB connector. Current is not drawn from this input pin.
Signal name: VCC_3V3_OUT Pin number(s): 13
This pin is connected to internal power regulator output. The pin is used for production testing and it
should not be used.
Signal name: MODULE_EN Pin number(s): 14
Driving this pin to high will enable the NUR ‐ 05WL2 module. It is internally connected to onboard
voltage regulator’s enable input. The trigger level is 1.2V and the reader module will wake up in 50ms.
If the external power switch is used to toggle ON and OFF, this pin can be connected directly to
VCC_3V6_IN.
Signal name: NC Pin number(s): 16, 31, 32
These pins are internally not connected.
Signal name: VCC_3V6_IN Pin number(s): 17
This pin is used for power supply input for NUR ‐ 05W module. It is recommended to use 200µF (low
ESR) 100nF and 100pF capacitor near the VCC_3V6_IN input pin to maintain stable operating voltage
for the reader module.
Signal name: RFU Pin number(s): 1, 18, 19
These pins are reserved for future use. Do not connect these pins.
Signal name: GND/RF_DIF Pin number(s): 29
This pin is internally connected to GND. It is reserved for future use as secondary RF output.