Altera CPRI IP Core - Manual (Page 33)

December 2013 Altera Corporation CPRI MegaCore Function
User Guide
4. Functional Description
The CPRI protocol interface complies with the CPRI Specification V5.0. The
specification divides the protocol into a two-layer hierarchy: a physical layer (layer 1)
and a data link layer (layer 2). The specification describes the following three
communication planes:
■ User data
■ Control and management (C&M)
■ Timing synchronization information
f More detailed information about the CPRI specification is available from the CPRI
website at
www.cpri.info .
The Altera CPRI IP core implements layer 1 and layer 2 of the specification in the
CPRI protocol interface module. This chapter describes the individual data and
control interfaces available to you and how the data on these interfaces is loaded and
unloaded from the CPRI frame.
This chapter contains the following sections:
■ Architecture Overview
■ Clocking Structure
■ Reset Requirements
■ MAP Interface
■ Auxiliary Interface
■ Media Independent Interface to an External Ethernet Block
■ CPU Interface
■ Accessing the Hyperframe Control Words
■ Accessing the Ethernet Channel
■ Accessing the HDLC Channel
■ CPRI Protocol Interface Layer (Physical Layer)