Hi,
I have questions about AM1808 VPIF interrupt.
The question is about frame interrupt.
I understand that the frame interrupt will be generated at the begining of frame.
But I want to know the timing of frame interrupt assertion.
1.Is frame interrupt timing same as VSYNC signal?
2.Does VPIF generate the frame interrupt at the timing of VSYNC rising-edge detection?
In TRM(spruh82a) page.1738 " 35.2.12.2 Field/Frame Interrupts to CPU ", it is written as follows:
//////////////////////////////////////////////////////////////////////////
The timing of the interrupt from the VPIF module is different from the timing of the V-sync.
//////////////////////////////////////////////////////////////////////////
but in page.1739, it is written as follows:
//////////////////////////////////////////////////////////////////////////
The interrupt signal from the VPIF is asserted when the vertical synchronization signal is received
//////////////////////////////////////////////////////////////////////////
So, I'm confusing.
best regards,
g.f.