Why the SN74HC245N is needed to read the ROM?

[odelot]

Hi,

nice video and fork you have here ;-)

I was confused why the SN74HC245N is needed to read the rom? Can you tell me why? (I really do not know. I was trying to read direct and I coudn't, and I cannot understand why since PICO GPIOs are 5v tolerants)

I thought it was just change the data pins from output to input, but it seems this do not work.

Thanks in advance,

Fábio