HOLTEK
HT1625
RAM Mapping 64x8 LCD Controller for I/O uC
 Features
Operating voltage: 2.7V~5.2V

Time base or WDT overflow output
Built-in RC oscillator Built-in LCD display RAM
External 32.768kHz crystal or 32kHz R/W address auto increment
frequency source input Two selectable buzzer frequencies(2kHz/4kHz)
1/4 bias, 1/8 duty, frame frequency is 64Hz Power down command reduces power consumption
Max. 64x8 patterns, 8 commons,64 segments Software configuration feature
Built-in internal resistor type bias generator Data mode and Command mode instructions
3-wire serial interface Three data accessing modes
8 kinds of time base/WDT selection VLCD pin to adjust LCD operating voltage
Cascade application  
 General Description
HT1625 is a peripheral device specially designed for I/O type uC used to expand the display and for
capability. The max. display segment of the device are 512 patterns (64x8). It also supports serial
interface,buzzer sound, watchdog timer or time base timer functions.The HT1625 is a memory mapping
multi-function LCD controller. The software configuration feature of the HT1625 make it suitable for
multiple LCD applications including LCD modules and display subsystems. Only three lines are kinds
required the interface between the host controller and the HT1625. The HT162X series have many of
products that match various applications.