Altera CPRI v6.0 MegaCore Function - Manual (Page 19)

Parameter Range Default
Setting
Parameter Description
Receiver FIFO depth 4, 5, 6, 7, or 8
6
The value you specify for this parameter is log
2
of
the IP core Layer 1 Rx buffer depth.The IP core
supports a maximum Layer 1 RX buffer depth of
256.
The default depth of the buffer is 64, specified by
the parameter default value of 6. For most systems,
the default buffer depth is adequate to handle
dispersion, jitter, and drift that can occur on the
link while the system is running. However, the
parameter is available for cases in which additional
depth is required.
The user guide refers to this parameter value as
RX_BUF_DEPTH
.
Enable auto-rate
negotiation
• On
• Off
Off
Turn on the Enable auto-rate negotiation
parameter to specify that your CPRI v6.0 IP core
supports auto-rate negotiation.
This parameter is available when you specify a
CPRI line bit rate (value for the Bit rate
parameter) that is greater than 614.4 Mbps.
Enable auto-rate
negotiation down to
614.4 Mbps
• On
• Off
Off
Turn on this parameter to specify that your auto-
rate negotiation enabled CPRI v6.0 IP core can
support auto-rate negotiation all the way down to
the CPRI line bit rate of 0.6144 Gbps.
This parameter is available when you turn on
Enable auto-rate negotiation.
Table 2-3: CPRI v6.0 IP Core Interface Feature Parameters
Describes the parameters for customizing the CPRI v6.0 IP core Layer 1 and Layer 2 interfaces and testing
features. These parameters appear on the Interfaces tab in the CPRI v6.0 parameter editor.
Parameter Range Default
Setting
Parameter Description
L1 Features
Supported CPU
interface standard
Currently, only the Avalon-
MM CPU interface is
available in the CPRI v6.0 IP
core.
Selects the interface specification that describes
the behavior of the CPRI v6.0 IP core register
access interface.
2-8 CPRI v6.0 IP Core Parameters
UG-01156
2014.08.18
Altera Corporation Getting Started with the CPRI v6.0 IP Core
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