Why AXI MCDMA IP output axi-stream with Spares TKeep and borken TData?

[leonqin_2025]

as described in datasheet,"The sparse tkeep is not allowed." 

but,I got the wave by signaltap:

why? 

[RongYuan]

Hi,

The "sparse tkeep" means a pattern like 8'b10101010.

A tkeep like 8'b00001111 is considered contiguous.

Regards,

Rong

[leonqin_2025]

Thanks for your reply!

but in UG-817911,"The invalid bytes are allowed only during
h2d_axi_st_tlast cycle" means that it allowed ONLY at last cycle? 

[RongYuan]

Since there are several modes in MCDMA IP, could you please send me your mcdma.ip and let me know the Quartus version you're using?

I'll check this from my end.

Thanks,

Rong