PXF4333 Datasheet, PDF (124/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

5
Interface Description
ABM-3G
PXF 4333 V1.1
Interface Description
5.1
UTOPIA L2 Interfaces (PHY side)
The UTOPIA Interface to the PHY is ATMF UTOPIA Level 2 and Level 1 compliant. The
interface can be configured in Master or Slave Mode. Internal UTOPIA FIFOs guarantee
Head-of-Line blocking-free operation in both modes. Each interface direction (receive
and transmit) is independently clocked. The PHY side and backplane side UTOPIA
Interfaces are identical with minor exceptions as described in the subsequent chapters.
5.1.1 URXU: UTOPIA Receive Upstream (PHY side)
The UTOPIA Receive Interface supports up to 48 PHY addresses that can be
individually enabled. In Master Mode and Slave Mode, 48 PHYs are supported in four
groups (4*12 scheme).
Note: In Slave Mode, the interface responds to all enabled port addresses.
•
4 cell FIFO
Backpressure
URXDATU(15:0)
URXSOCU
URXPRTYU
URXCLKU
URXADRU(4:0)
URXENBU(3:0)
URXCLAVU(3:0)
Addressing up to
4*12 PHYs:
PHY 3
PHAYdd2ress
PHAYdd1re0s..s11
PHAYdd0re0s..s11
Addre0s..s11
0..11
Figure 5-1
•
UTOPIA Receive Upstream Master Mode
4 cell FIFO
URXDATU(15:0)
URXSOCU
URXPRTYU
URXCLKU
Backpressure
URXADRU(4:0)
URXENBU(3:0)
URXCLAVU(3:0)
Responding to up to 4*12 addresses
Figure 5-2 UTOPIA Receive Upstream Slave Mode
Data Sheet
124
2001-12-17