PXF4336 Datasheet, PDF (161/425 Pages) Infineon Technologies AG – ABM Premium ATM Buf fer Manager

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64 Cells Buffer Pool:
Logical Queues per
UTOPIA port
Queue Specific
Backpressure
Scheduler Block
ABM-P
PXF 4336 V1.1
Interface Description
UTXDATD(15:0)
UTXSOCD
UTXPRTYD
UTXCLKD
UTXADRD(4:0)
UTXENBD(3:0)
UTXCLAVD(3:0)
Addressing up to
4*12 PHYs:
PHY 3
PHAYdd2ress
PHAYdd1re0s..s11
PHAYd0dre0s..s11
Addre0s..s11
0..11
Figure 5-3 UTOPIA Transmit Downstream Master Mode
64 Cells Buffer Pool:
Logical Queues per
UTOPIA port
Queue Specific
Backpressure
Scheduler Block
UTXDATD(15:0)
UTXSOCD
UTXPRTYD
UTXCLKD
UTXADRD(4:0)
UTXENBD(3:0)
UTXCLAVD(3:0)
Responding to
a) up to 4*12 addresses
b) up to 1*31 addresses
(UTXENBD(0), UTXCLAVD(0) only)
Figure 5-4 UTOPIA Transmit Downstream Slave Mode
Head of Line Blocking Avoidance
The internal Cell Handler Unit forwards cells to UTOPIA port-specific queues. In case of
a filled queue, queue-specific backpressure is signalled to all schedulers that are
associated to that queue/port prohibiting further cell emits. Thus no HOL blocking can
occur.
Data Sheet
161
2001-12-17