Internal LCD Port

The LCD (480x320) in the MP2x00 is connected to the main board through a 20 pin flat ribbon cable (0.5mm pitch).

Pin	Name	Function
1	GND	Ground
2	GND
3	lcdSwVCC	3.2V
4	lcdFiltFlm	Start of frame (half frame?) High pulse 41.5us every 13.2ms (75.2Hz)
5	lcdVccEn	H, 3.2V
6	lcdFiltLnClk	Start of line sync, High pulse 240ns every 41.2us or 24.3kHz, ~320 clock cycles per frame
7	lcdFiltAcMod	5ms or 200Hz 50% (this frequency is somewhat irregular)
8	lcdFlltVdClk	starts 2.5us after LnClk falls, two pixel sync at 640ns or 1.5MHz. This adds up to ~60 clock pulses per line, or 120 pixels in 16 grays, or just a fourth of the screen width.
9	lcdFiltD0	4 bit 16 grays data for two pixels at 640ns or 1.5MHz, stable when VdClk falls
10	lcdFiltD1
11	lcdFiltD2
12	lcdFiltD3
13	lcdFiltD4
14	lcdFiltD5
15	lcdFiltD6
16	lcdFiltD7
17	d21VVc	21V
18	lcdSwVCC	3.2V
19	GND
20	GND