Siemens S75/CX75/C81/M75 Display¶
The controller in displays manufactured by Alps is a SOLOMON SYSTECH SSD1286 which can drive color displays of up to 132 x 176 pixels in 18 bit color.
The portrait mode is a bit more 'native' for this display because
modm::BufferedGraphicDisplay requests that the vertical resolution is
divisible by 8.
In portrait mode the connector is at the top. In landscapeLeft mode the connector is at the left border. In landscapeRight mode the connector is at the right border.
Pinout at LCD:
1 IN CD Command / Data Low = Command (Register) High = Data. 2 IN RESET Resets the display. Active low. Low = Reset, High = No reset. 3 IN CS Chip select. Active low. Low = Chip is selected, High = Chip is not selected. 4 OUT VD Sync Output. Unused. 5 GND Supply 6 IN D0 Bit 0 of parallel data 7 3V3 (2V9) Supply 8 GND Supply 9 VLED + Supply Backlight 10 VLED - Supply Backlight 11 GND Supply 12 IN RD Read Strobe. Must be tied high. 13 IN WR Write Strobe. High-to-Low strobe write data to display memory. 14 IN D1 Bit 1 of parallel data. 15 IN D2 Bit 2 of parallel data. 16 IN D3 Bit 3 of parallel data. 17 IN D4 Bit 4 of parallel data. 18 IN D5 Bit 5 of parallel data. 19 IN D6 Bit 6 of parallel data. 20 IN D7 Bit 7 of parallel data.
Pin 1 is unmarked. Pin 5 can be recognized by a thicker trace which is GND.
The backlight (VLED +, VLED -) consists of four white LEDs in series. The forward voltage is about 12 volts.