https://www.esp32.com/viewtopic.php?f=19&t=1746&p=8153&hilit=parallel#p8153

Seems like I'm 3us late with reading and preparing my response. The posted scan looks like it takes 175us from address change to address change. Putting it in relation, an EEPROM takes 150ns to respond, that's 1/20 of the time I have now. With 240MHz the ESP32 should have a clock cycle time of 4.16ns. Whaaaat? My math is broken. Seems like the maximum speed for gpios on the ESP is "quite" limited, max toggle freq is around 4MHz. https://www.esp32.com/viewtopic.php?f=2&t=1595&p=7482&hilit=parallel#p7482

Seems like there is a multipin IS2 interface that was also used on https://github.com/igrr/esp32-cam-demo/blob/master/components/camera/camera.c#L314

https://www.esp32.com/viewtopic.php?f=12&t=951&p=4113&hilit=parallel#p4113