Altera Embedded Peripherals IP User Manual
Page 178
Parameter
Legal Values
Description
Error width
0–32
The width of the
error
signal on the Avalon-ST data
interfaces.
FIFO depth
2–2
32
The depth of each memory segment allocated for a
channel. The value must be a multiple of 2.
Use packets
0 or 1
Setting this parameter to 1 enables packet support on the
Avalon-ST data interfaces.
Use fill level
0 or 1
Setting this parameter to 1 enables the Avalon-MM
status interface.
Number of almost-full
thresholds
0 to 2
The number of almost-full thresholds to enable. Setting
this parameter to 1 enables Use almost-full threshold 1.
Setting it to 2 enables both Use almost-full threshold 1
and Use almost-full threshold 2.
Number of almost-
empty thresholds
0 to 2
The number of almost-empty thresholds to enable.
Setting this parameter to 1 enables Use almost-empty
threshold 1. Setting it to 2 enables both Use almost-
empty threshold 1 and Use almost-empty threshold 2.
Section available
threshold
0 to 2
Address
Width
Specify the amount of data to be delivered to the output
interface. This parameter applies only when packet
support is disabled.
Packet buffer mode
0 or 1
Setting this parameter to 1 causes the core to deliver only
full packets to the output interface. This parameter
applies only when Use packets is set to 1.
Drop on error
0 or 1
Setting this parameter to 1 causes the core to drop
packets at the Avalon-ST data sink interface if the
error
signal on that interface is asserted. Otherwise, the core
accepts the packet and sends it out on the Avalon-ST
data source interface with the same error. This parameter
applies only when packet buffer mode is enabled.
Address width
1–32
The width of the FIFO address. This parameter is
determined by the parameter FIFO depth; FIFO depth =
2
Address Width
.
Use request
—
Turn on this parameter to implement the Avalon-MM
request interface. If the core is configured to support
more than one channel and the request interface is
disabled, only channel 0 is accessible.
UG-01085
2014.24.07
Parameters
17-5
Avalon-ST Multi-Channel Shared Memory FIFO Core
Altera Corporation