HM17CM256

Features:

`256 color bitmap LCD driver
`LCD drive outputs 128´RGB segments, 80 commons for graphic and 2 commons for icons
`Display RAM capacity 81,920bits (for graphic usage)
                     2,048bits (for icon usage)
`Gradation display 8 gradations can be selected from 32 gradations by PWM control
`Black/White display 82 ´ (128 ´ 3) bits display is possible
`8 bit BUS interface directly connectable with 68 / 80 series CPU
`RAM data length 8 BIT / 16 BIT selectable
`Serial interface available
`Programmable duty / bias ratio with command
`Various instruction set
     display data read/write, display ON/OFF, positive/negative display, page address set
     display start line address set, partial display, bias select,
     column address set, all display ON/OFF, boosting selection, n line inversion mode
     read modified write, power save .
`Built-in voltage booster (programmable) : 7 ´ boosting
`Built-in voltage regulator
`Controllable contrast with built-in electric volume (128 steps)
`Low current consumption
`Logic supply 1.7V ~ 3.3V
`LCD drive supply 5.0V ~ 18.0V
`C-MOS silicon process
`Package bumped chip / bare chip


Description

HM17CM256 is a dot-Matrix LCD drive IC with 82 commons (80 + 2 icons) and 384 segments (128 X RGB) drive ports for 256 colors driving.
This HM17CM256 IC stores the serial or parallel BIT data transferred by the microcomputer on the built-in RAM (81,920 bits for graphic + 2048 bits for icons) and generates the signals to drive LCD panel.

Color graphic display is achieved by selecting 8 gray (256 color) levels out of 32 gray palettes independently. This HM17CM256 IC is suitable for battery-operated system, hand-carrying information equipment by ensuring low power consumption, low power supply (1.7V ~ ) and a wide range of operating voltage. And 164 x 128 display (maximum) is possible with master and slave application.