LED Driver 12 Click Board™

Product Code: MIKROE-4977

How Does The LED Driver 12 Click Board™ Work? The LED Driver 12 Click Board™ as its foundation uses the PCA9532, a 16-bit I2C-configurable LED dimmer from NXP Semiconductors. The PCA9532 has two fully programmable PWM controllers used to control up to 16 LED channels, switching each of the LEDs ON and OFF independently. Each LED output, 16 LED drivers presented on two 1x8 male headers, with a maximum output current of 25mA per channel, has a programmable period ranging from 0.6Hz to 152Hz and a programmable duty cycle from 0 to 100%, which means that the LEDs can be set to blink steadily and visibly, or dimmed. Any bits not used for controlling the LED channels can be used for General Purpose parallel Input/Output (GPIO) expansion, providing a simple solution when additional I/O is needed for some power switches, sensors, push-buttons, alarm monitoring, fans, or other applications. The LED Driver 12 Click Board™ communicates with MCU using the standard I2C 2-Wire interface that supports Standard-Mode (100 kHz) and Fast-Mode (400 kHz) operation.

The PCA9532 has a 7-bit slave address with the first five MSBs fixed to 1100. The address pins A0, A1, and A2, are programmed by the user and determine the value of the last three LSBs of the slave address, which can be selected by onboard SMD jumpers labelled as ADDR SEL allowing selection of the slave address LSBs. Alongside the internal Power-On Reset (POR) function, this board also has an active-low reset signal routed on the RST pin of the mikroBUS™ socket used to recover from a bus-fault condition. When this signal is asserted low, the PCA9532 resets its registers alongside with I2C state machine and deselects all channels. The LED Driver 12 Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used, as a reference, for further development. SPECIFICATIONS Type LED Drivers Applications The LED Driver 12 Click Board™ can be used for color mixing and backlight application for amusement products, LED status signalization, home automation projects, and many more On-board modules PCA9532 - 16-bit I2C-configurable LED dimmer from NXP Semiconductors Key Features Low power consumption, 16 channels, ON/OFF LED channels control, two selectable fully programmable blink rates, supports hot insertion, drive LEDs to 25mA, and more Interface I2C Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the pinout of the LED Driver 12 Click Board™ 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 NC Reset RST 2 RST INT 15 NC NC 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 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default Description LD1 PWR - Power LED Indicator JP1-JP3 ADDR SEL - I2C Address Selection 1/0: Left position 1, Right position 0 JP4 VCC SEL - Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V J1-J2 0-15 - LED Driver Channels LED DRIVER 12 CLICK