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

leonqin_2025
Beginner
‎09-04-2025 07:49 PM
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as described in datasheet,"The sparse tkeep is not allowed." 

but,I got the wave by signaltap:

 

why? mcdma_axis_tx.pngdatasheet.png

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RongYuan
Employee
‎09-09-2025 11:01 PM
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Hi,

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

A tkeep like 8'b00001111 is considered contiguous.


Regards,

Rong


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leonqin_2025
Beginner
‎09-09-2025 11:50 PM
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In response to RongYuan

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? 

In response to RongYuan
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