Developing A Display from Siemens S65 with LS020

The project illustrates how the Siemens S65 was incorporated with LS020 display controller to be used for some applications.

The use of Siemens S65 is due to the fact that it contains a 16-bit color TFT display with 132×176 pixels while a white backlight LED along with an attractive screen is integrated with it. There is currently one limitation on the port to the LS020-displays in which it can only be used with GLCD in the 90 degree orientation. This is due to the bitmaps/fonts column written by GLCD for column in Y-direction. The flexible memory addressing of the Philips controller in the Nokia 6100 display was used to support different display orientations.

A 2.9V supply that is generated out of an LDO from the 5V supply of the ATmega128 microcontroller is used to supply both displays. The ATmega128 runs with 16MHz while one reason why the IRU1205CLTR LDO was used is due to the power ON/OFF feature. Between the microcontroller and the display are the 5 interface lines which are level-shifted from the 5V domain of the microcontroller to the 2.9V domain of the display for getting stable signals.
Read more