Altera RapidIO II MegaCore Function - Manual (Page 57)

Chapter 4: Functional Description 4–15
Logical Layer Interfaces
August 2014 Altera Corporation RapidIO II MegaCore Function
User Guide
Table 4–7 lists the write-request conversions the RapidIO II IP core performs for
RapidIO write request packets with wrsize value less than 4’b1100.
1001 (1)
0
0 1 0000_0000_1111_1100
1 1 1111_1100_0000_0000
1
0 1 0000_0000_0011_1111
1 1 0011_1111_0000_0000
1010 (1)
0
0 1 0000_0000_1111_1110
1 1 0000_0000_0111_1111
1
0 1 1111_1110_0000_0000
1 1 0111_1111_0000_0000
1011
0
0 1 0000_0000_1111_1111
1 1 1111_1111_0000_0000
1
0 1 1111_1111_1111_1111
1 (2)
1100 (3)
0 0 2 1111_1111_1111_1111
1 0 4 1111_1111_1111_1111
1101 (3)
0 0 6 1111_1111_1111_1111
1 0 8 1111_1111_1111_1111
1110 (3)
0 0 10 1111_1111_1111_1111
1 0 12 1111_1111_1111_1111
1111 (3)
0 0 14 1111_1111_1111_1111
1 0 16 1111_1111_1111_1111
Notes to Table 4–6 :
(1) The RapidIO link partner should avoid read requests with this rdsize value, because the resulting byteenable
value is not allowed by the Avalon-MM specification. However, if the RapidIO II IP core receives a read request with
this rdsize value, the IP core issues these transactions on the I/O Logical layer Avalon-MM master interface with
the illegal byteenable values, to support systems in which user logic handles these byteenable values.
(2) This combination of wdptr and rdsize values is reserved. If the RapidIO II IP core receives this combination, it
sets the Unsupported Transaction bit (UNSUPPORT_TRAN) in the Logical/Transport Layer Error Detect
CSR (
Table 6–67 on page 6–43 ) and returns an ERROR response.
(3) If rdsize has a value greater than 4’b1011, and address[0] has the value of 1, the RapidIO II IP core sets the
Unsupported Transaction bit (UNSUPPORT_TRAN) in the Logical/Transport Layer Error Detect CSR
(
Table 6–67 on page 6–43 ) and returns an ERROR response.
Table 4–7. Avalon-MM I/O Master Write Transaction Burstcount and Byteenable I (Part 1 of 3)
RapidIO Field Values Avalon-MM Signal Values
wrsize
(4'bxxxx)
wdptr
(1'bx)
address[0]
(1'bx)
Burstcount Byteenable (16'bxxxx_xxxx_xxxx_xxxx)
0000
0
0 1 0000_0000_1000_0000
1 1 1000_0000_0000_0000
1
0 1 0000_0000_0000_1000
1 1 0000_1000_0000_0000
Table 4–6. Avalon-MM I/O Master Read Transaction Burstcount (Part 2 of 2)
RapidIO Field Values Avalon-MM Signal Values
rdsize
(4'bxxxx)
wdptr
(1'bx)
address[0]
(1'bx)
Burstcount
Byteenable
(16'bxxxxxxxxxxxxxxxx)