OV7640 Datasheet, PDF (8/20 Pages) List of Unclassifed Manufacturers – OV7640 Color CMOS VGA (640 x 480) CAMERACHIP OV7141 B&W CMOS VGA (640 x 480) CAMERACHIP

OV7640/OV7141 CMOS VGA (640 x 480) CAMERACHIP™
Omni ision
Figure 6 VGA Frame Timing Diagram
VSYNC
3t
ROW
HREF
525 t
ROW
11 t
ROW
764 t _PCLK
640 t _PCLK
124 t _PCLK
31 t
ROW
Y[7:0]
(Invalid Data)
Row 0 Row 1 Row 2
Last Row
(Invalid Data)
Figure 7 QVGA Frame Timing Diagram
VSYNC
3t
ROW
HREF
262.5 t
ROW
9t
ROW
382 t _PCLK
320 t _PCLK
62 t _PCLK
Y[7:0]
(Invalid Data)
Row 0 Row 1 Row 2
10.5 t
ROW
Last Row
(Invalid Data)
Note: As the RGB, YUV and YCbCr formats use the Bayer pattern for interpolation, the first row transferred out on the Y[7:0]
bus will be invalid, as there is no row above Row #1 to provide the 'pair data' required. Because of this, the OV7640
does not enable the HREF signal during the first row read (shown above in the 'invalid data' zone).
8
Proprietary to OmniVision Technologies
Version 1.4, March 6, 2003