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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.
HT16K33 IC Feature
- 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
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I²C addressing
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.
Schema
12*8 display application: (No INT pin function and 10*3 key function):
Arduino
Sources
I²C topics on lamaPLC
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