BLE 5, Thread, Zigbee Modules,BT840X/XE
Ver 1.11 April 2019
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Evaluation board can be used as a reference design for using modules. EV BT840X V4 is designed for the
BT840X soldering pads with 61 pins. These 21 pins in solid dark color are for BT840X.
EV BT840X V4 evaluation board is developed for BT840X and BT832X. It can be used for BT832 and BT832F.
Pins in solid color are used only for BT840X. Blue color pin names around U1 BT840(832) are for
BT832/BT832F/BT832X. Red color pin names are for BT840X/BT840/BT840E. Firmware pin configuration is
required for a host board to accommodate BT840X/BT840/BT840E and BT832/BT832F/BT832X.
Additional feature enhancements for version V4 evaluation board:
1. It has the same foot print as Arduino Uno R3. Additional connectors are added for connection to extra GPIO
pins of BlueNor modules.
2. EV BT840X is not an UNO R3 compatible board. You can use Nordic develop tools to develop firmware for
many UNO R3 compatible shields.
3. Portable smartphone charger can be used to power this board. The circuitry to the left of micro USB
connector, J16 produces periodic load to prevent portable smartphone charger from shutting down.
Suggestion for Battery Power Application
Standby current consumption is important for battery-powered product. We suggest adding a 32.768 kHz
crystal and 2 capacitors on host board. The 32MHz main clock won’t be active at idle state to save power.
Two inductors required for on-board DC to DC converter are inside BT840X. You can enable DCDC converter
to have lower power consumption.
