Holtek HT1625

Holtek  HT1625 original Integrated Circuits IC

Description

HT1625 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 512 patterns (648). It also supports

serial interface, buzzer sound, Watchdog

Timer or time base timer functions. The

HT1625 is a memory mapping and

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 required for the interface between

the host controller and the HT1625. The

HT162X series have many kinds of products

that match various applications.

Features

 Operating voltage: 2.7V~5.2V

 Built-in RC oscillator

 External 32.768kHz crystal or 32kHz

frequency source input

 1/4 bias, 1/8 duty, frame frequency is 64Hz

 Max. 648 patterns, 8 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

 Cascade application