Camera Interface

[Yossi_Boran]

Hi

Is there anyone who knows if Nordic has SoC`s with Camera Interface ,the Camera is CMOS parallel  data rate 20 - 27MHz

Thanks

[haakonsh]

Our peripherals runs on a 16MHz clock, and our CPU's at 64MHz. So that's not really feasible. 

Maybe you can bit-bang it with the 128MHz CPU of the new nRF5340, but it depends on how many I/O lines you need. 

[Yossi_Boran]

Hi

What is the peripherals rate on nRF5340?

Thanks

[haakonsh]

Still 16MHz, but the GPIO peripheral is not synched to the 16MHz clock (GPIOTE is), so the CPU might be able to drive them faster than 16MHz. 

A 27MHz parallel interface is a bit tricky for ULP cortex-m platforms. 

[haakonsh]

how many I/O lines does this interface use?

[Yossi_Boran]

8 I/O

HSYNC

VSYNC

PCLK

[haakonsh]

Hmm, 
At 27MHz you'll have 128/27 = 4 clock cycles to find the next state of the pins and update the GPIO register. That's not feasible. 

You'll probably need a minimum of 20 clock cycles of a fully optimized code to bit-bang such an interface, so that's at least a ~20*27MHz = ~540MHz CPU. And that's given that the internal memory bus and GPIO peripheral are fast enough. 

You're probably better off looking for a dedicated interface IC.