Is it possible to use IFC simultaneous with QSPI_A and QSPI_B ?

[benoitmasse]

Hi,

In our design(ls2044).

We need to

- IFC Bus CS1 to connect to a cpld. (Use as a G

- QSPI_A to communicate with SPI devices (not a flash)

- QSPI_B to communicate with SPI devices (not a flash)

Is it feasible or I'm dreaming.

In the DOC, IFC can manage the data bus for NAND-NOR-GPCM-GASIC based on the internal memory map, but I didn't find any example of Multiplexing IO Pin between IFC and QSPA.

For ls2088ardb board. Their has a note: (QorIQ LS2085A/LS2088A Reference Design Board Reference Manual, Rev. 2, 08/2017)

   NOTE

   QSPI device and Emulator connector are only available on
   RDB Rev E and later. When operating in QSPI mode, the IFC
   interface is non-functional, and access to the CPLD through
   IFC bus is disabled.

Is it true only for that board or is true for LS2088(or LS2044) ?

Thanks,

qspi‌

#ifc‌

[Bulat]

Yes, it is a problem. When QSPI is used, then only NAND controller can be used on IFC. All other IFC machines (including GASIC) can not be used because their signals are muxed to be used on QSPI interfaces.

Regards,

Bulat