DIGI POT 13 Click Board™

Product Code: MIKROE-5683

How Does The DIGI POT 13 Click Board™ Work? The DIGI POT 13 Click Board™ is based on the MAX5419, a 256-tap non-volatile digital potentiometer from Analog Devices. It can perform as a discrete potentiometer or variable resistor. The potentiometers consist of a resistor array with 255 fixed resistor elements in series between appropriate H and L terminals. The potentiometer wiper (W) terminal is programmable to access any one of the 256 tap points on the resistor string, with typically 325 ohms of wiper resistance and 150-250kΩ of end-to-end resistance (200kΩ typical). It also features a power-on reset circuitry that loads the wiper position from non-volatile memory at power up. The memory is guaranteed for 50 years for wiper data retention and up to 200.000 wiper store cycles. The DIGI POT 13 Click Board™ communicates with the host MCU using the standard I2C 2-Wire interface, with a maximum clock frequency in Fast data transfer of up to 400KHz (400kbps). The I2C address can be selected via the ADDR SEL jumper with 0 selected by default.

Over the I2C interface, all data can be stored in an internal 8-bit EEPROM. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can 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 Digital potentiometer Applications It can be used for the development of mechanical potentiometer replacements for the portable consumer market, volume control, LCD contrast control, and battery-backup industrial applications On-board modules MAX5419 - digital potentiometer from Analog Devices Key Features Single channel, single supply operation, 256-position resolution, 200kΩ nominal resistance, I2C-compatible interface, nonvolatile memory stores wiper settings, 50 years of typical data retention, and more Interface I2C Compatibility mikroBUS Click board size M (42.9 x 25.4 mm) Input Voltage 3.3V or 5V PINOUT DIAGRAM This table shows how the DIGI POT 13 Click Board™ pinout 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 NC 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 VCC SEL Left Logic Level Voltage Selection 3V3/5V: Left position 3V3, Right position 5V JP2 ADDR SEL Left I2C Address Selection 0/1: Left position 0, Right position 1 DIGI POT 13 CLICK ELECTRICAL SPECIFICATIONS Description Min Typ Max Unit Supply Voltage 3.3 - 5 V Nominal Resistance - 200 - kΩ Resolution - 256 - taps Wiper Resistance - 325 - Ω