Altera CPRI IP Core - Manual (Page 25)

December 2013 Altera Corporation CPRI MegaCore Function
User Guide
3. Parameter Settings
You customize the CPRI IP core by specifying parameters in the CPRI parameter
editor, which you access from the MegaWizard Plug-In Manager in the Quartus II
software.
This chapter describes the parameters and how they affect the behavior of the CPRI IP
core. You can modify parameter values to specify the following CPRI IP core
properties:
■ Default clocking mode—whether this CPRI IP core instance is configured initially
with slave clocking mode (RE slave) or with master clocking mode (REC or RE
master).
■ Line rate.
■ Autorate negotiation—whether this CPRI IP core instance supports the connection
of external logic to implement autorate negotiation.
■ Starting channel number. This option is available only in the following devices:
■ Arria II GX and Arria II GZ
■ Cyclone IV
■ Stratix IV
■ Depth of the low-level receiver elastic buffer.
■ Transceiver reference clock frequency. This option is available only in Arria V,
Cyclone V, and Stratix V devices.
■ Ethernet MAC—whether to include an internal Ethernet MAC block or provide an
MII to connect to an external Ethernet module. These two options are mutually
exclusive.
■ HDLC block—whether to include an internal HDLC block or not.
■ Number of antenna-carrier interfaces.
■ Whether the antenna-carrier interfaces are clocked by the CPRI IP core clock
cpri_clkout or by external clocks.
■ Mapping modes—select the mode: All, Basic, Advanced1, Advanced2, and
Advanced3
.
■ Whether to include an automatic round-trip delay calibration block or not.
■ Whether to allow vendor-specific space (VSS) access through the CPU interface or
not.
Physical Layer Parameters
This section lists the parameters that affect the configuration of the physical layer of
the CPRI IP core.