Datasheet for the OmniVision OV7670 CMOS VGA image sensor, as an 856 KB PDF. It covers the SCCB control interface (similar to I2C), register settings, parallel pixel bus timing with VSYNC, HREF and PCLK, supply rails, and output formats such as YUV and RGB. Hobby camera modules built around this sensor are common. When troubleshooting, verify the external clock input, the analog and core supply voltages, and register access over SCCB before blaming the sensor.
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