HT1647A Datasheet | Holtek Semiconductor

Features - Operating voltage: 2.7V~5.2V - Built-in 32k Hz RC oscillator - External 32.768k Hz crystal oscillator or 32k Hz - Eight kinds of time base/WDT selection - Time base or WDT overflow output - R/W address auto increment - Built-in buzzer driver (2k Hz/4k Hz) - Power down mand reduces power consumption - Software configuration feature - Data mode and mand mode instructions - Three data accessing modes - Provides VLCD pin to adjust LCD operating voltage - Provides three kinds of bias current programming - Control of TN-type, STN-type LCDs and frequency source input - Standby current: <1m A at 3V, <2m A at 5V - Internal resistor type: 1/5 bias or 1/4 bias, 1/16 duty - Two selectable LCD frame frequencies: 89Hz or 170Hz - Max. 64´16 patterns, 64 segments and 16 mons - Built-in bit-map display RAM: 1024 bits (=64´16 bits) - Built-in internal resistor type bias generator - Six-wire interface (four data wires) ECB-type LCDs - 100-pin LQFP package and in chip form Applications - Leisure products - Games - Personal digital assistant - Cellular phone - Global positioning system - Consumer electronics General Description HT1647A is a peripheral device specially designed for I/O type MCU used to expand the display capability. The max. display segment of the device are 1024 patterns (64 segments and 16 mons). It also supports four data bits interface, buzzer sound, Watchdog Timer or time base timer functions. The HT1647A is a memory mapping and multi-function LCD controller. Since the HT1647A can control ECB-type (Electrically Controlled Birefringence) LCDs in addition to current TN-type (Twisted Nematic) or STN-type (Super Twisted Nematic) LCDs. The software configuration feature of the HT1647A make it suitable for multiple LCD applications including LCD modules and display subsystems. Only six lines (CS, WR, DB0~DB3) are required for the interface between the host controller and the HT1647A. Rev. 1.40 April 29, 2011 Datasheet pdf -...