HD66420 - Hitachi Semiconductor

HD66420 (RAM-Provided 160 Channel 4-Level Grey Scale Driver for Dot Matrix Graphics LCD)

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 powerfu.

Features

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• 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:  55µA typ. 80µA max. during display  0.1µA typ. 5µA max. during standby
• Circuits for generatin.