Technically, we can use any camera module with supported SPI or I2C protocols. One of the camera modules with this feature is the OV7670 module. This module is manufactured by OmniVision; you can find its datasheet at http://www.electronicaestudio.com/docs/sht001.pdf.
There are two OV7670 modules available on the market: the OV7670 module with FIFO, and the OV7670 module without FIFO. The OV7670 module with FIFO can enhance video processing.
You can identify whether the OV7670 camera module is a FIFO model or not by checking the back of the camera module. The OV7670 camera module with FIFO has an additional chip on the back of the module. Figure 8.3 shows the OV7670 camera module without FIFO:
Figure 8.4 shows the OV7670 camera module with FIFO. This module has an AL422B IC that uses FIFO to enhance video...
