Ilitek Controller "Graphics Operation Functions "

Hallo,

weiß jemand wie die Graphics Operation Functions bei den Ilitek 
Controller funktionieren ? z.B. beim 9325 ?

Dort steht immer in allen Datasheets die ich gefunden hab:
Bit Operation
The ILI9325 supports a write data mask function for selectively writing 
data to the internal RAM in units of bits
and a logical/compare operation to write data to the GRAM only when a 
condition is met as a result of
comparing the data and the compare register bits. For details, see 
“Graphics Operation Functions”.

Das Kapitel gibts leider nicht.

LG Egon :)