SPI shift registers

[n.serina]

Hello,

In STM32F446RE mcu the block diagram shows 2 shift registers , but in STM32F407x spi block diagram it shows only shift diagram . which one is correct ? are these SPI IPs are different on these devices ? please clarify . i have attached the image of my confusion

thanks a lot

[Imen.D]

Hello @n.serina​ ,

There is no difference regarding SPI shift registers on these devices.

It's is the same principle and I think it's just a rework in the figure.

Kind Regards,

Imen

[S.Ma]

Figure 306 is probably newer and more accurate.

[Tesla DeLorean]

Apt to be the least complex implementation, remember also these registers need to switch between 8 and 16-bit modes.

The diagrams are pretty simplistic/naive, one might be able to get a pragmatic view of the plumbing, but not enough to develop a gate level model or simulation.

[n.serina]

Thanks everyone .