HT1650 datasheet(1/18 Pages) HOLTEK

Part #	HT1650

Description	64x32 LCD Controller for I/O MCU

PDF	18 Pages

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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HT1650

64´32 LCD Controller for I/O MCU

Rev. 1.20

1

November 10, 2005

Features

· Operating voltage: 2.7V~5.2V

· Built-in 32kHz RC oscillator

· External 32.768kHz crystal oscillator or 32kHz fre-

quency source input

· Standby current: <1mA at 3V, <2mAat5V

· Internal resistor type: 1/6 bias or 1/5 bias, 1/32 duty,

and 1/16 duty

· Three selectable LCD frame frequencies: 64Hz,

89Hz or 170Hz

· Max. of 64´32 patterns, 64 segments and 32 com-

mons

· 80 segments and 16 commons selectable by com-

mand method

· Built-in bit-map display RAM: 2048 bits (=64´32 bits)

· Built-in internal resistor type bias generator

· Six-wire interface (four data wires)

· Eight kinds of time base or WDT selection

· Time base or WDT overflow output

· R/W address auto increment

· Built-in buzzer driver (2kHz/4kHz)

· Power down command reduces power consumption

· Software configuration feature

· Data mode and Command mode instructions

· Three data accessing modes

· Provides VLCD pin to adjust LCD operating voltage

and max. VLCD voltage up to 7V

· Provides three kinds of bias current programming

· Control of TN-type and STN-type LCDs

· 128-pin QFP package

General Description

HT1650 is a peripheral device specially designed for I/O

type MCUs which are used to expand the display capa-

bility. The max. display segment of the device are 2048

patterns (64 segments and 32 commons). It also sup-

ports four data bits interface, buzzer sound, Watchdog

Timer or time base timer functions. The HT1650 is a

memory mapping and multi-function LCD controller. It

can control TN-type (Twisted Nematic) or STN-type

(Super Twisted Nematic) LCDs. The software configu-

ration feature of the HT1650 make it suitable for multiple

LCD applications including LCD modules and display

subsystems. Only six lines (CS,WR, DB0~DB3) are re-

quired for the interface between the host controller and

the HT1650.

Applications

· Leisure products

· Games

· Personal digital assistant

· Cellular phone

· Global positioning system

· Consumer electronics

Technical Document

· FAQs

· Application Note

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