LCD Controller & Driver (I²C) - RAM Mapping 20×4 / 16x8 LCD Controller Driver

The HT16C21A device is a memory mapping and multi-function LCD controller/driver. The display segments of the device are 80 patterns (20 segments and 4 commons) or 128 patterns (16 segments and 8 commons). The software configuration feature of the HT16C21A device makes it suitable for multiple LCD applications including LCD modules and display subsystems. The HT16C21A device communicates with most microprocessors/microcontrollers via a two-line bidirectional I²C interface.

Features:

• operating voltage: 2.4V~5.5V
• internal 32kHz RC oscillator
• bias: 1/3 or 1/4; Duty: 1/4 or 1/8
• internal LCD bias generation with voltage-follower buffers
• I²C interface
• two selectable LCD frame frequencies: 80Hz or 160Hz
• up to 16×8 bits RAM for display data storage
• display patterns:
  • 20×4 patterns: 20 segments and 4 commons
  • 16×8 patterns: 16 segments and 8 commons
• versatile blinking modes
• R/W address auto increment
• internal 16-step voltage adjustment to adjust LCD operating voltage
• low power consumption
• provides the VLCD pin to adjust LCD operating voltage
• manufactured in silicon gate CMOS 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
• interface: I²C
• case: 24SSOP