
Chapter 6: Software Interface 6–41
Transport and Logical Layer Registers
August 2014 Altera Corporation RapidIO II MegaCore Function
User Guide
Input/Output Slave Pending Transactions
INVALID_WRITE_BURSTCOUNT
[2] RW1C
Write burst count invalid. Asserted when
io_s_burstcount
has a value that is larger than 16,
except in cases with first byteenable with a value of
0xFF00 and final byteenable with a value of 0x00FF, in an
Avalon-MM write request on the I/O Logical slave
interface. For information about valid values, refer to
Table 4–10 and Table 4–12.
1'b0
WRITE_OUT_OF_BOUNDS
[1] RW1C
Write request address out of bounds. Asserted when the
Avalon-MM address does not fall within any enabled
address mapping window.
1'b0
READ_OUT_OF_BOUNDS
[0] RW1C
Read request address out of bounds.
Asserted when the Avalon-MM address does not fall
within any enabled address mapping window.
1'b0
Table 6–60. Input/Output Slave Interrupt—Offset: 0x10500 (Part 2 of 2)
Field Bits Access Function Default
Table 6–61. Input/Output Slave Interrupt Enable—Offset: 0x10504
Field Bits Access Function Default
RSRV
[31:6] RO Reserved
26'h0
INVALID_READ_BURSTCOUNT
[5] RW Read burst count invalid interrupt enable
1'b0
INVALID_READ_BYTEENABLE
[4] RW Read byte enable invalid interrupt enable
1'b0
INVALID_WRITE_BYTEENABLE
[3] RW Write byte enable invalid interrupt enable
1'b0
INVALID_WRITE_BURSTCOUNT
[2] RW Write burst count invalid interrupt enable
1'b0
WRITE_OUT_OF_BOUNDS
[1] RW Write request address out of bounds interrupt enable
1'b0
READ_OUT_OF_BOUNDS
[0] RW Read request address out of bounds interrupt enable
1'b0
Table 6–62. Input/Output Slave Pending NWRITE_R Transactions—Offset: 0x10508
Field Bits Access Function Default
RSRV
[31:8] RO Reserved
24'h0
PENDING_NWRITE_RS
[7:0] RO
Number of pending NWRITE_R write requests that
have been initiated in the I/O Avalon-MM slave Logical
layer module but have not yet completed.
The value in this field might update only after a delay
of 4 Avalon clock cycles after the start of the write
burst on the Avalon-MM interface.
8'b0
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