Proximity 12 Click Board™

Product Code: MIKROE-3995

How Does The Proximity 12 Click Board™ Work? The Proximity 12 Click Board™ uses the TMD3719, an optical sensor that integrates ambient light sensing, proximity detection, and flicker detection sensing from AMS-AG. The ambient light and colour sensing function provide six concurrent ambient light sensing channels: Red, Green, Blue, Clear, Leakage, and Wideband, which accurately measure ambient light and calculate illuminance, chromaticity, and colour temperature. The TMD3719 also integrates direct detection of ambient light flicker for four selectable frequency bins, executed parallel with ambient light and colour sensing. The proximity function synchronizes IR emission and detection to sense nearby objects. This function features self-maximizing dynamic range, ambient light subtraction, and advanced cross-talk cancellation. The proximity engine recognizes detect/release events and produces a configurable interrupt, routed to the INT pin of the mikroBUS™ socket, whenever the proximity result crosses upper or lower threshold settings.

The Proximity 12 Click Board™ communicates with MCU using the standard I2C 2-Wire interface with a maximum clock frequency of up to 400kHz. In addition to I2C communication, several GPIO pins connected to the mikroBUS™ socket pins are also used. The SYN pin, routed to the CS pin of the mikroBUS™ socket, is used to synchronize data and allows the start of the classic ambient light, proximity sensing, and flicker detection with every new SYN signal instead of immediately. It also has two pins labelled GP1 and GP2, routed on the RST and PWM pins of the mikroBUS™ socket, used as general-purpose pins, more precisely, GP1 as open-drain general purpose input/output and GP2 only as an input pin. The TMD3719 requires a supply voltage of 1.8V to work correctly. Therefore, a small regulating LDO is used, the BH18PB1WHFV from Rohm Semiconductor, providing a 1.8V out of 3.3V mikroBUS™ rail. The LDO cut power consumption by lowering its current consumption to approximately 2μA when the application is operating in the Standby state. This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type Proximity Applications Can be used for consumer and industrial applications such as brightness and colour management, flicker-immune operations, and many more On-board modules TMD3719, an optical sensor that integrates ambient light sensing, proximity detection, and flicker detection sensing from AMS-AG Key Features Low power consumption, synchronized proximity function, high sensitivity, improved lux accuracy, RGB sensing, flicker detection, and more Interface I2C Compatibility mikroBUS Click board size S (28.6 x 25.4 mm) Input Voltage 3.3V PINOUT DIAGRAM This table shows how the pinout on Proximity 12 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 GP2 GP Input GP Input/Output GP1 2 RST INT 15 INT Interrupt Data Sync SYN 3 CS RX 14 NC NC 4 SCK TX 13 NC NC 5 MISO SCL 12 SCL I2C Clock NC 6 MOSI SDA 11 SDA I2C Data Power Supply 3.3V 7 3.3V 5V 10 NC Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator PROXIMITY 12 CLICK ELECTRICAL SPECIFICATIONS