Z-turn-Board-V2-Diary

Peripherals: What we can and cannot blink through either the PL or the PS unit.

This started as an attempt to blink MIO through PL, but that’s not possible..

Summary: MIO and EMIO can only be used through the PS.

PL

There is a schematic page named Z720_PL, showing the available, to the PL unit, pins.

These are called IO_*.

PS

There is a schematic page named Z720_PS, showing the available, to the PL unit, pins.

These are called PS_DDR_* and PS_MIO_*.

They can also be seen under FIXED_IO and DDR entries inside the I/O Ports [tab] (after opening “Elaborate Design”).

EMIO

I think EMIO serves as sharing PL’s pins to PS.

(I’m a bit unsure of the following, but):

• Enable EMIO
• Make the [new] GPIO port external.
• Choose PL pins for the [new] GPIO (external) bus. (Through “I/O Ports” (Open “Elaborate Design”)).

Use cases

The following are only accessible from the PS:

• Buttton(MIO50)
• user LED1/LED2 (MIO0/MIO9)
• CAN [pins] (MIO14/MIO15)

References

• MIO and EMIO Configuration for Zynq-7000 (video)
• Z-turn Board V2 schematic (pdf)
• “Can I use MIO pins to route PL external ports? (without involving the PS)” (forum)
• Zynq-7000 All Programmable SoC: Concepts, Tools, and Techniques (CTT) A Hands-On Guide to Effective Embedded System Design (pdf)