![](http://datasheet.mmic.net.cn/330000/PM7329-BI_datasheet_16444382/PM7329-BI_28.png)
PM7329 S/UNI-APEX-1K800
DATASHEET
PMC-2010141
ISSUE 2
ATM TRAFFIC MANAGER AND SWITCH
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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maintained. Various error monitoring conditions and statistics are accumulated
or flagged. The uP has access to both internal S/UNI-APEX-1K800 registers and
the context memory as well as diagnostic access to the cell buffer memory.
The S/UNI-APEX-1K800 provides a 8/16-bit Any-PHY compliant loop side
master/slave interface supporting up to 128 ports. Egress cell transfers across
the interface are identified via an inband port identifier prepended to the cell. The
slave devices must match the inband port identifier with their own port ID or port
ID range in order to accept the cell. Per port egress flow control is effected via a
8-bit address polling bus to which the appropriate slave device responds with out
of band per port flow control status. Ingress cell transfers across the interface are
effected via a combination of UTOPIA L2 flow control polling and device
selection for up to 32 slave devices. The Any-PHY loop side interface may be
reconfigured as a standard single port UTOPIA L2 compliant slave interface. 16-
bit prepends are optionally supported on both ingress and egress for cell flow
identification enabling use with external address resolution devices, switch fabric
interfaces, or other layer devices.
The S/UNI-APEX-1K800 provides an 8/16-bit Any-PHY or UTOPIA L2 compliant
WAN side master/slave interface supporting up to 4 ports. 16-bit prepends are
optionally supported on both ingress and egress for cell flow identification
enabling use with external address resolution devices, switch fabric interfaces, or
other layer devices. The WAN port has port aliasing on the egress, providing in
service re-direction without requiring re-programming the context of active VCs.
The S/UNI-APEX-1K800 provides a 32-bit microprocessor bus interface for
signaling, control, cell and frame message extraction and insertion, VC. Class
and port context access, control and status monitoring, and configuration of the
IC. Microprocessor burst access for registers, cell and frame traffic is supported.
The S/UNI-APEX-1K800 provides a 36-bit ZBT or late write SSRAM interface for
context storage supporting up to 4MB of context for up to 1024 VCs and up to
256k cell buffer pointer storage. Context Memory protection is provided via 2 bits
of parity over each 34-bit word.
The total number of cells, the total number of VCs, support for address mapping
and shaped fair queuing is limited to the amount of context and cell buffer
memory available. Below is a table illustrating the most common combinations
of memory/features.