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HD66420

Features: · Built-in bit-mapped display RAM: 25.6kbits (160 ´ 80 ´ 2 bits)· Grey scale display: PWM four-level grey scale can be selected from 32 levels· Grey scale memory management: Packed pixel· Partial display: Eight-lines data can be displayed in any place· An 80-system MPU interf...

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SeekIC No. : 004360405 Detail

HD66420: Features: · Built-in bit-mapped display RAM: 25.6kbits (160 ´ 80 ´ 2 bits)· Grey scale display: PWM four-level grey scale can be selected from 32 levels· Grey scale memory management: Pa...

HD66420 Data Sheet

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Part Number:
HD66420
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

·  Built-in bit-mapped display RAM: 25.6kbits (160 ´ 80 ´ 2 bits)
·  Grey scale display: PWM four-level grey scale can be selected from 32 levels
·  Grey scale memory management: Packed pixel
·  Partial display: Eight-lines data can be displayed in any place
·  An 80-system MPU interface
·  Power supply voltage for operation : 2.2V to 5.5V
·  Power supply voltage for LCD : 13 V max.
·  Selectable multiplex duty ratio: 1/8, 1/32, 1/64, 1/80
·  Built-in oscillator: external resister
·  Low power consumption:
     ¾ 55mA typ. 80mA max. during display
     ¾ 0.1mA typ. 5mA max. during standby
·  Circuits for generating LCD driving voltage : Contrast control, Operational amplifier, and Resistive dividers
·  Internal resistive divider: programmable bias rate
·  32-level programmable contrast control


Specifications

Item   Symbol Ratings Unit Notes
Power Supply
voltage		 Logic circuit VCC 0.3 to +7.0 V 1
LCD drive circuit VLCD 0.3 to +15.0 V  
Input voltage 1   VT1 0.3 to VCC + 0.3 V 1, 2
Input voltage 2   VT2 0.3 to VLCD + 0.3 V 1, 3
Operation temperature   Topr 40 to +85  
Storage temperature   Tstg 55 to +110  
Notes: 1. Measured relative to GND
2. Applies to pins M/S, OSC, OSC1, OSC2, DB7 to DB0, RD, WR, CS, RS, RES, CL1, M, FLM
3. Applies to pins V1O, V2O, V3O, V4O and V5O
4. If the LSI is used beyond its absolute maximum rating, it may be permanently damaged.
It should always be used within the limits of its electrical characteristics to prevent malfunction or unreliability.


Description

The HD66420 drives and controls a dot matrix graphic LCD(Liquid Crystal Display) using a bit-mapped method. It provides a highly flexible display through its on-chip display RAM, in which each two bits of data can be used to turn on or off one dot on LCD panel with four-level grey scale.

A single HD66420 can display a maximum of 160x80 dots using its powerful display control functions. It can display only eight lines out of eighty lines. This function realize low power consumption because high voltage for driving LCD is not needed.

An MPU can access HD66420 at any time, because the MPU operations are asynchronous with the HD66420's system clock and display operation.

Its low-voltage operation at 2.2 to 5.5V and standby function provides low power dissipation, making the HD66420 suitable for small portable device applications.




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