Samsung S5PC100 User Manual page 1128

S5PC100 USER'S MANUAL (REV1.0)
7.5 TIMING DIAGRAM FOR REGISTER SETTING
The first register setting for frame capture command occurs anywhere in frame period. It is recommended to do
first set the VSYNC "L" state, Input DMA start "L" state and VVALID "H" state. VSYNC and VVALID information
can be read from status SFR. Refer to Figure 9.3-12. All command including ImgCptEn, is valid at VSYNC falling
edge or VVALID rising edge. Make sure that except first SFR setting; all command should be programmed in
Interrupt Service Routine (ISR). Size, image mirror or rotation, windowing, and Zoom In settings are allowed to
change in capturing operation. In case od DMA input mode, all command should be programmed after InputDMA
and OutputDMA operation end.
VSYNC
HREF
INTERRUPT
Image Capture
VVALID
HVALID
INTERRUPT
Image Capture
VSYNC
HREF
INTERRUPT
Image Capture
New Command
Reserved
SFR setting
(ImageCptEr)
Reserved
SFR setting
(ImgCptEr)
Frame Capture Start for external camera input
In Capturing
Reserved
New SFR
command
New command valid timing diagram
CAMERA INTERFACE
Multi frame
capturing
Multi frame
capturing
9.3-13