OV7640 Просмотр технического описания (PDF) - Unspecified

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OV7640

OV7640 Color CMOS VGA (640 x 480) CAMERACHIP™, OV7141 B&W CMOS VGA (640 x 480) CAMERACHIP™

Unspecified 

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

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