Altera RapidIO II MegaCore Function User Manual
Page 96
4–54
Chapter 4: Functional Description
Logical Layer Interfaces
RapidIO II MegaCore Function
August 2014
Altera Corporation
User Guide
Table 4–29
lists the fields of the gen_rx_hd_data bus.
Table 4–29. RapidIO Header Fields in gen_rx_hd_data Bus
Field
gen_rx_hd_data Bits
Value
Comment
pd_size[8:0]
[114:106]
Size of payload data, in bytes.
VC
[105]
0
The RapidIO II IP core supports only VC0.
CRF
[104]
prio[1:0]
[103:102]
tt[1:0]
[101:100]
ftype[3:0]
[99:96]
destinationID[15:0]
[95:80]
For packets with an 8-bit device ID, bits [95:88] (bits
[15:8] of the destinationID) are set to 8’h00.
sourceID[15:0]
[79:64]
When ftype[3:0] has the value of 7, this field is used
as the tgtDestinationID field.
For packets with an 8-bit device ID, bits [79:72] (bits
[15:8] of the sourceID) are set to 8’h00.
specific_header[63:0]
[63:0]
Fields depend on the format type specified in ftype.
Refer to
Table 4–30
.