Hard Processor System Technical Reference Manual: Agilex™ 5 SoCs
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5.8.6.5.7.3. Short Data Argument Data Structure
Short data argument data structure is used to provide payload-related information for the TX transfers when the payload size is less than or equal to 3 bytes.
BIT-FIELD | FIELD NAME | WIDTH | DESCRIPTION |
---|---|---|---|
31:23 | DATA_BYTE_2 | 8 | Data Byte -2 This field is used for storing the data byte -2. |
23:16 | DATA_BYTE_1 | 8 | Data Byte -1 This field is used for storing the data byte -1. |
15:8 | DATA_BYTE_0/DB |
8 | Data Byte -0/Defining Byte This field is used for storing the data byte -0. DB indicates the 8-bit defining byte to be transferred in the CCC transfer. This byte is valid only when both CP and DBP bits are enabled, otherwise the controller ignores this byte.
Note: When defining byte (DBP) is enabled in short data argument,
|
7:6 | RESV | 2 | Reserved |
5:3 | BYTE_STRB | 3 | Byte Strobe This field is used to select the valid data bytes of the short data argument.
Valid combinations = 3'b001, 3'b011, and 3'b111 |
2:0 | CMD_ATTR | 3 | Command Attribute Defines the command type and its bit-field format.
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