Samsung S3C2451X User Manual page 605

S3C2451X RISC MICROPROCESSOR
ENVID_MS
ImgCptEn_PrSC
Preview DMA frame done
(internal signal)
IRQ
FrameCnt
MSDMA FEATURE
MSDMA supports memory data scaling. Camera interface has two input devices (only preview path). First is
external camera. Second is Memory data. If MSDMA (reading the memory data) want to use in preview path. SFR
SEL_DMA_CAM signal should be set '1'. This input path is called Memory Scaling DMA path.
NOTE: Only two image format support for MSDMA input. (= Saved memory format)
1. YCbCr 4:2:0
2. YCbCr 4:2:2 (Interleave)
External
camera
YCbCr 4:2:0
(non-interleave)
Memory
4:2:2(interleave)
Figure 23-13. MSDMA or External Camera interface (only CAMIFpreview path)
SFR SFR
region region
FrameCnt ++
3 0
Capture O Capture O
(Frame_3) (Frame_0)
Figure 23-12. Timing diagram for last IRQ
ITU-R 601/656
MSDMA
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
SFR SFR
region region
1 1
Capture X
T_PatternMux CatchCam
MSDMA path
SFR
region region
2 3
Capture O
Capture O
(Frame_1)
(Frame_2)
Signal Muxing
Space
Converter
Preview path
CAMERA INTERFACE
SFR SFR
region
0
Capture O
(Frame_3)
Color
RGB
23-13