General Description
HT16270 is a peripheral device specially designed for I/O type C used to expand the display capability. The max. display segment of the device are 1024 patterns (6416). It also supports serial interface, buzzer sound, watchdog timer or time base timer functions. The HT16270 is a memory mapping and multi-function LCD controller.

Features
• Operating voltage: 2.7V~5.2V
• External Crystal 32.768kHz oscillator
• 1/5 bias, 1/16 duty, frame frequency is 64Hz
• Max. 64x16 patterns, 16 commons, 64 segments
• Built-in internal resistor type bias generator
• 3-wire serial interface
• 8 kinds of time base/WDT selection
• Time base or WDT overflow output
• Built-in LCD display RAM
• R/W address auto increment
• Two selectable buzzer frequencies (2kHz/4kHz)
• Power down command reduces power consumption
• Software configuration feature
• Data mode and Command mode instructions
• Three data accessing modes
• VLCD pin to adjust LCD operating voltage