lamaPLC: HT16K33 display controller

The HT16K33 is a memory-mapped, multi-function LED controller driver. The maximum display segment count on the device is 128 patterns (16 segments and eight commons), with a 13×3 Maximum matrix key scan circuit. The software-configurable features of the HT16K33 make it suitable for a wide range of LED applications, including LED modules and display subsystems. The HT16K33 is compatible with most microcontrollers and communicates via a two-line bidirectional I²C bus.

• Operating voltage: 4.5V–5.5V
• Integrated RC oscillator
• I²C-bus interface
• 16×8-bit RAM for display data storage
• Max. 16×8 patterns, 16 segments, and eight commons
• R/W address auto-increment
• Max. 13×3 matrix key scanning
• 16-step dimming circuit
• Supports 20/24/28-pin SOP package types

The base I²C address for an HT16K33 is 0x70, but it can be changed to one of seven other addresses by setting the four address pins (A0-A3) via hardware. Each HT16K33 chip can have a unique address from 0x70 to 0x77. If multiple HT16K33 devices are used on the same bus, each must have a distinct address, and if you use more than one, their addresses must be sequential, such as 0x70, 0x71, 0x72. 

12*8 display application: (No INT pin function and 10*3 key function):

https://docs.arduino.cc/libraries/simple-ht16k33-library/

https://www.digikey.com/htmldatasheets/production/2070902/0/0/1/ht16k33.html

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