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). The display protocol sends black and white data only. Grayscales are generated by the Newton DMA by switching pixels on and off frame by frame. As old LCDs are slow, the blinking is not visible.

Pin	Name	Function
1	GND	Ground
2	GND
3	lcdSwVCC	3.2V
4	lcdFiltFlm	Start of 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%, possibly for generating different voltages
8	lcdFlltVdClk	starts 2.5us after LnClk falls, pixel data sync at 640ns or 1.5MHz. 60 clock pulses per line, 60 bytes at 8 pixels each, generating 480 B&W pixels
9	lcdFiltD0	last pixel in byte
10	lcdFiltD1	stable when VdClk falls
11	lcdFiltD2	..
12	lcdFiltD3	..
13	lcdFiltD4	..
14	lcdFiltD5	..
15	lcdFiltD6	..
16	lcdFiltD7	first pixel in byte, left to right
17	d21VVc	21V
18	lcdSwVCC	3.2V
19	GND
20	GND