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Adventurer
Adventurer
219 Views
Registered: ‎02-13-2019

operation time using masking data (app_wdf_mask)

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Hi, I'm Jose.

I'd like to know the next.

suppose that I have and user-interface data bus of 128 bits. Now suppose the next two cases:
1- One write operation to the memory with a value (128 bits wide) without masking any bit within the 128 bits of the data.
2- One write operation to the memory with a value (128 bits wide) but this time masking the upper half of the 128 bits of the data.

both values take the same time to be written to the memory?

if I'm masking bytes of data, is possible that the write operation is carry out faster than if not?

thanks

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Xilinx Employee
Xilinx Employee
187 Views
Registered: ‎08-21-2007

回复: operation time using masking data (app_wdf_mask)

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It takes the same time to be written to the memory. When you're using the app_wdf_mask, it will mapped the DM signals at the memory interface. The write latency and data burst length are kept the same.

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Xilinx Employee
Xilinx Employee
188 Views
Registered: ‎08-21-2007

回复: operation time using masking data (app_wdf_mask)

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It takes the same time to be written to the memory. When you're using the app_wdf_mask, it will mapped the DM signals at the memory interface. The write latency and data burst length are kept the same.

Adventurer
Adventurer
172 Views
Registered: ‎02-13-2019

回复: operation time using masking data (app_wdf_mask)

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thanks @kren four your help.
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