HT1647 datasheet(1/17 Pages) HOLTEK

tên linh kiện	HT1647

Giải thích chi tiết về linh kiện	4-Level Gray Scale 64x16 LCD Controller for I/O MCU

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HT1647

4-Level Gray Scale 64´16 LCD Controller for I/O MCU

Rev. 1.30

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: < 1mAat3V,<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: 2048 bits (=64´16´2

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

· Four-level gray scale output for TN-type, STN-type

LCDs panel

· Four-color output for ECB-type LCDs panel

· 100-pin QFP package and in chip form

General Description

HT1647 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 HT1647 is a memory

mapping and multi-function LCD controller. Since the

HT1647 can control ECB-type (Electrically Controlled

Birefringence) LCDs in addition to current TN-type

(Twisted Nematic) or STN-type (Super Twisted Ne-

matic) LCDs, it can support 4-color display as well as

4-level gray scale display. It displays 4-level gray scale

output when the HT1647 drives a TN-type, STN-type

LCDs. It displays four color output when the HT1647

drives an ECB-type. HT1647 uses PWM (Pulse Width

Modulation) technique. The software configuration fea-

ture of the HT1647 make it suitable for multiple LCD ap-

plications 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 HT1647.

Applications

· Leisure products

· Games

· Personal digital assistant

· Cellular phone

· Global positioning system

· Consumer electronics

Technical Document

· FAQs

· Application Note

Số phần tương tự - HT1647

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