User Guide

Display interface

Figure

Display interface block diagram

below shows how the display related signals are routed. Display HWA

controlling is done via LoSSI bus and pixel data is transferred via ViSSI-12 bus. MeSSI-8 is the interface between

display HWA and display.

Supply voltages for display:

Keyboard

ITU keypad and five-way cursor control and dedicated multimedia key are implemented on a standard

crosspoint matrix.

Backlight and illumination

The device has backlight illuminating the display, upper keypad, lower keypad and qwerty keypad.

RM-412; RM-413

System Module and User Interface

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