HT1647A datasheet(1/19 Pages) HOLTEK

Part #	HT1647A

Description	6416 LCD Controller for I/O MCU

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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HT1647A

64´16 LCD Controller for I/O MCU

PATENTED

PAT No. : 099352

Rev. 1.20

1

June 22, 2009

Features

· Operating voltage: 2.7V~5.2V

· Built-in 32kHz RC oscillator

· External 32.768kHz crystal oscillator or 32kHz

frequency source input

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

· 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 commons

· Built-in bit-map display RAM: 1024 bits

(=64

´16 bits)

· Built-in internal resistor type bias generator

· Six-wire interface (four data wires)

· Eight kinds of time base/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

· Provides three kinds of bias current programming

· Control of TN-type, STN-type LCDs and

ECB-type LCDs

· 100-pin QFP package and in chip form

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 commons). 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 Ne-

matic) 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 inter-

face between the host controller and the HT1647A.

Applications

· Leisure products

· Games

· Personal digital assistant

· Cellular phone

· Global positioning system

· Consumer electronics

Technical Document

· Application Note

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