MY PROBLEM FINALY SOLVED 
The main problem when using LCD NOKIA series with PCF8814 driver for dual-display or more,
is on the initialization instruction command sequence.
After trying several times combination, I finally found the perfect combination for use in the multi display.
Especially if the screen is used, use of different manufacturers' serial number
In my case, I use the LCD with the following serial numbers:
- nokia 4850899
- nokia 4851030
- nokia 4850104
COMPATIBILITY TYPE
1100, 1101, 2300 has 9-pad connector:
NOKIA-1202, 1203, 1280 has 12-pad connector:
1110, 1110i, 1112, 1116, 1200, 2660ext, 2760ext, 6085ext has 10-pin connector:
I use a library was created by catzallin and combined with those made by igorox, with slight modifications, especially at the beginning of the initialization process of the LCD, and a command for writing the image, which uses "PROGMEM" to reduce the size of the firmware.
But still there is a little problem at the speed of image rendering.
was still very slow for the image data writing
I do not understand to this, what parts of the code that must be changed, so the rendering speed can be increased in the multi display.
For code that I change, can be checked at my github or in the attachment bellow:
Please input and suggestions for improvement nokia 1100 (PCF8814) driver
THANKS.
PCF8814-master.zip (15.1 KB)