MBR_UBC

Descriptor Structure Microblock Control Member

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Parent topic: Descriptor Structure Members Description

Descriptor Structure Microblock Control Member

Bit  31 30 29 28 27 26 25 24  
        NVIEW[1:0] NDEN NSEN NDE  
Access        R R R R R  
Reset                   
Bit  23 22 21 20 19 18 17 16  
  UBLEN[23:16]  
Access  R R R R R R R R  
Reset                   
Bit  15 14 13 12 11 10 9 8  
  UBLEN[15:8]  
Access  R R R R R R R R  
Reset                   
Bit  7 6 5 4 3 2 1 0  
  UBLEN[7:0]  
Access  R R R R R R R R  
Reset                   

Bits 23:0 – UBLEN[23:0]: Microblock Length

Microblock Length

This field indicates the number of data in the microblock. The microblock contains UBLEN data.

Bit 24 – NDE: Next Descriptor Enable

Next Descriptor Enable

ValueDescription
0 Descriptor fetch is disabled.
1 Descriptor fetch is enabled.

Bit 25 – NSEN: Next Descriptor Source Update

Next Descriptor Source Update

ValueDescription
0 Source parameters remain unchanged.
1 Source parameters are updated when the descriptor is retrieved.

Bit 26 – NDEN: Next Descriptor Destination Update

Next Descriptor Destination Update

ValueDescription
0 Destination parameters remain unchanged.
1 Destination parameters are updated when the descriptor is retrieved.

Bits 28:27 – NVIEW[1:0]: Next Descriptor View

Next Descriptor View

ValueNameDescription
0 NDV0 Next Descriptor View 0
1 NDV1 Next Descriptor View 1
2 NDV2 Next Descriptor View 2
3 NDV3 Next Descriptor View 3