LCD Controller & Driver with keyscan (I²C) - RAM Mapping 20*4/16*8 

The HT16K23A is a memory mapping and multifunction LCD controller driver. The Max. display segment numbers in the device are 80 patterns (20 segments and 4 commons) or 128 patterns (16 segments and 8 commons). The Max. key scan circuits are 20×1 matrix or 16×1 matrix. The software configuration feature of the HT16K23A makes it suitable for multiple LCD applications including LCD modules and display subsystems. The HT16K23A supports a hardware interrupt using register setting.

The HT16K23A is compatible with most microcontrollers and communicates via a two-line bidirectional I²C-bus.

Features:

• logic voltage: 2.4V~5.5V
• integrated RC oscillator
• various display modes
  • max. 20×4 patterns, 20 segments, 4 commons, 1/3 bias, 1/4 duty
  • max. 16×8 patterns, 16 segments, 8 commons, 1/4 bias, 1/8 duty
• I²C-bus interface
• key scan function
  • max. 20×1 matrix key scanning in 20×4 display mode
  • max. 16×1 matrix key scanning in 16×8 display mode
• 16×8 bits RAM for display data storage
• selectable hardware interrupt
• R/W address auto increment
• manufactured in silicon gate COMS process

Specification:

• VDD: 2.4V~5.5V
• segment x common: 20×4, 16×8
• LCD voltage: = VDD
• bias: 1/3, 1/4
• build-in OSC
• key-scan: 20x1
• interface: I²C
• case: 28SSOP