Renesas R61509V 用户手册

Rev. 0.11 April 25, 2008, page 116 of 181  

 

In the FMARK interface operation, data is written to internal RAM via system interface synchronizing with 
the frame mark signal (FMARK), realizing tearing less video image while using conventional system 
interface. FMARK output position is set in units of line using FMP bit. Set the bit considering data transfer 
speed.  

RS

WRX

16

FMARK

CSX

DB17-10, 8-1

 

 
In this operation, moving picture display is enabled via system interface by writing data at higher than the 
internal display operation frequency to a certain degree, which guarantees rewriting the moving picture 
RAM area without causing flicker on the display.  

The data is written in the internal RAM. Therefore, when moving picture is displayed, data is written only 
to the moving picture display area without using RGB or VSYNC interface, minimizing number of data 
transfer required for moving picture display. 

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RAM data 
write via
system interface

Display operation
synchronized with
internal clock

FMARK

 

Figure 39 Moving Picture Data Transfers via FMARK Function