The design description provides detailed descriptions of Smart Remote 3 DK add-on
hardware blocks.
Trackpad
The trackpad is mounted onto the PCA63519 board and connected to the P12 connector.
Keypad matrix
The keypad on the Smart Remote 3 DK add-on board (PCA63519) board has 39 buttons.
Low-power accelerometer circuit
To obtain low power consumption and long battery lifetime, a low-power three-axis accelerometer (U3) has been added to the remote control.
Motion tracking device
For advanced features, the remote control has a three-axis gyro integrated with a three-axis accelerometer (U2).
Power supply
The Smart Remote 3 DK add-on gets its power from two AA batteries or from the nRF5x Development Kit (DK).
Infrared LED and driver
To support legacy products, the remote control has an infrared LED with a driver circuit.
Codec
A codec is used in conjunction with the nRF51 DK to get the analog signal from the microphone to digital signals.
nRF51 DK interface
Connectors P1, P3, P4, P6, P7, and P8 are used to connect the DK add-on to the nRF51 DK.
nRF52 DK interface
Connectors P1, P3, P4, P6, P7, and P8 are used to connect the DK add-on to the nRF52 DK.
Current measurement
The Smart Remote 3 DK add-on has two pin headers available for current measurement. These pin headers make it possible to measure current for the DK add-on and for the microphone.
I2C bus connector
A connector for the I2C bus is available on the P5 header. This can be used for debugging or connecting to external sensors.