I have tried to read ILI9341 LCD controller ID (D3H), but it doesn’t work until now, the EXTC has been high, the result as below:

1. The leve1 command read/write is OK. The leve2 command (EXTC should be high to enable this command) write is OK, read by FMC port is OK but read by SPI is fail.

2.ID1/ID2/ID3 (leve1 command DAH/DBH/DCH) can be programmed by user(level2 command D1H/D2H) successfully .

3. The LCD acknowledges data is different between FMC port and SPI port, for example the 09H command, the first byte data will be invalid, when read by FMC... (More)

The Displaytech monochrome LCD part numbers follow a standard system. The first set of numbers is for the product series:

Character Modules
The numbers stand for the number of characters
(e.g. 161 = 16 characters x 1 line; 204 = 20 characters x 4 lines)

Graphic Modules
The numbers stand for the display resolution (e.g. 64128 = 64x128 dots; 128240 = 128x240 dots). The letter stands for the version (e.g. both 64128K & 64128M are with the same resolution, but the size of them are different, so they are with different letter as identification)

The remaining details for the other... (More)