Altera POS-PHY Level 2 and 3 Compiler - Manual (Page 30)

3–2 Chapter 3: Functional Description
Example Configurations
POS-PHY Level 2 and 3 Compiler User Guide © November 2009 Altera Corporation
Preliminary
POS-PHY level 3 is a point-to-point system—transmit joins to transmit; channel 0
joins to channel 0, and so on (see
Figure 3–3 ). POS-PHY level 2 is a unidirectional bus
system.
Example Configurations
Figure 3–4 on page 3–2 shows a packet-processing function, which receives packets at
one end from a POS-PHY PHY interface, processes them, and passes them on to a
POS-PHY link interface.
Figure 3–2. Example Interface
Figure 3–3. Connecting POS-PHY Level 3 MegaCore Functions
'A' Source
Interface
FIFO
'B1' Sink
Interface
FIFO
'B2' Sink
Interface
FIFO
'B3' Sink
Interface
FIFO
'B n'' Sink
Interface
MegaCore Function
Sink
Interface
PHY Transmit
Function
Link Transmit
Function
Source
Interface
Source
Interface
PHY Receive
Function
Link Receive
Function
Sink
Interface
Figure 3–4. Example Configuration—Use of the Atlantic Interface
Level 3
Link
Interface
FIFO
FIFO
FIFO
Packet
Processing
Function
MegaCore Function 1
100 MHz
32 bit
FIFO
FIFO
FIFO
Level 3
PHY
Interface
MegaCore Function 2
100 MHz
32 bit
Atlantic
Interfaces
Atlantic
Interfaces