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MAXREFDES1265: Simple Keypad Interface Using the MAX32625PICO and MAX7360

MAXREFDES1265

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Description

The MAXREFDES1265 is a reference design showcasing the MAX7360 and MAX32625PICO with a low-cost, small-size keypad interface. The MAX7360 I2C-interfaced peripheral allows microprocessors and microcontrollers to manage up to 64 key switches with additional eight LED drivers/GPIOs (general-purpose input/output) featuring constant current, PWM (pulse-width modulation) intensity control, and rotary switch control options. The MAX32625PICO is an Arm®-core-based, low-power microcontroller. It acts as the I2C master for the MAX7360 to read and put these values on the PC terminal through the USB interface.

Hardware Specification

The MAXREFDES1265 has pinout headers for rows and columns to connect the keypad. The microcontroller reads the value through the MAX7360 with the I2C interface every time a key is pressed. The microcontroller simulta-neously puts the value on the terminal of the PC.

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Designed, Built, Tested

Board pictured here has been fully assembled and tested. Not available for sale.

 

Maxim Devices (2)

Part Number Name Product Family Order Design kits and evaluation modules
MAX7360 I²C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection Controllers/Expanders Buy Now Design Kits
MAX32625PICO Evaluation Kit for the MAX32625/MAX14750 MCU - Microcontroller Buy Now Not Available

Maxim Devices (2)

Part Number Product Family
Controllers/Expanders
I²C-Interfaced Key-Switch Controller and LED Driver/GPIOs with Integrated ESD Protection
MCU - Microcontroller
Evaluation Kit for the MAX32625/MAX14750
Not Available

Applications

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