• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Confusing timing diagram for QCIF format in OV7670 datasheet.


New Member
Any reply is greatly appreciated!!

I wanted to confirm about the QCIF timing diagram from datasheet(shown below). The ON time of the HREF for both vga and QCIF is shown as 640tp (tp=2tpclk). So does that mean each line of QCIF (174x2 bytes) take 640tp seconds? So in that case, bytes of a QCIF line arrive at the rate of 6.66Mhz (when HREF is high and for pclk frequency of 24Mhz) and not at 24Mhz?Hence if i were to sample bytes(of QCIF format), belonging to a line(when HREF is high),i must not sample at every PCLK rising edge?


Latest threads

EE World Online Articles