Altera RapidIO II MegaCore Function - Manual (Page 62)

4–20 Chapter 4: Functional Description
Logical Layer Interfaces
RapidIO II MegaCore Function August 2014 Altera Corporation
User Guide
Input/Output Avalon-MM Slave Signals
Table 4–9 lists the Input/Output Avalon-MM Slave module interface signals.
The I/O Avalon-MM Slave module supports an interrupt line, io_s_mnt_irq, on the
Register Access interface. When enabled, the following interrupts assert the
io_s_mnt_irq
signal:
The interface supports an interrupt line, io_s_mnt_irq. When enabled, the following
interrupts assert the io_s_mnt_irq signal:
■ Read out of bounds
■ Write out of bounds
■ Invalid write
■ Invalid read or write burstcount
■ Invalid read or write byteenable value
For more information about the I/O Logical layer Avalon-MM slave module
interrupts, refer to
Table 6–60 on page 6–40 and Table 6–61 on page 6–41 .
Initiating Read and Write Transactions
To initiate a read or write transaction on the RapidIO link, your system sends a read or
write request to the I/O Logical layer Slave module Avalon-MM interface.
Table 4–9. Input/Output Avalon-MM Slave Interface Signals
Signal Direction Description
ios_rd_wr_waitrequest Output I/O Logical Layer Avalon-MM Slave module wait request.
ios_rd_wr_write Input I/O Logical Layer Avalon-MM Slave module write request.
ios_rd_wr_read Input I/O Logical Layer Avalon-MM Slave module read request.
ios_rd_wr_address[N:0]
for N == 9, 10,..., or 31
Input
I/O Logical Layer Avalon-MM Slave module address bus. The address
is a quad-word address (addresses a 16-byte (128-bit) quad-word),
not a byte address.
Refer to “Defining the Input/Output Avalon-MM Slave Address Mapping
Windows” on page 4–22 for information about the RapidIO II IP core
process to determine the values for the corresponding RapidIO packet
header fields. You determine the width of the ios_rd_wr_address
bus in the RapidIO II parameter editor.
ios_rd_wr_writedata[127:0] Input I/O Logical Layer Avalon-MM Slave module write data bus.
ios_rd_wr_byteenable[15:0] Input I/O Logical Layer Avalon-MM Slave module byte enable.
ios_rd_wr_burstcount[4:0] Input I/O Logical Layer Avalon-MM Slave module burst count.
ios_rd_wr_readresponse Output
I/O Logical Layer Avalon-MM Slave module read error response. I/O
Logical Layer Avalon-MM Slave module read error. Indicates that the
burst read transfer did not complete successfully.
ios_rd_wr_readdata[127:0] Output I/O Logical Layer Avalon-MM Slave module read data bus.
ios_rd_wr_readdatavalid Output I/O Logical Layer Avalon-MM Slave module read data valid.