Utopia Transmit Module; Utopia Level 2 Coprocessor - Intel IXP45X Developer's Manual

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UTOPIA Level 2—Intel IXP45X and Intel
• IXP45X/IXP46X network processors — 31 physical devices
Additionally, the two-cycle polling routine defined by the UTOPIA Level 2 specification
limits the number of physical devices to 26.
The ATM Adaptation Layers (AAL) implemented by the Network Processor Engine may
have some further limitations on the number of physical interfaces supported. For more
details on the number of physical interfaces supported, see the Intel
Programmer's Guide.
On the Network Processor Engine side, the UTOPIA Level 2 coprocessor interfaces to
the Network Processor Engine Core via the Network Processor Engine Coprocessor Bus
Interface. The Network Processor Engine Coprocessor Bus Interface is used to transfer
data to and from the Network Processor Engine core. The Network Processor Engine
Coprocessor Bus Interface also is used to access status and configuration information
for the UTOPIA Level 2 coprocessor.
Figure 32
Figure 32.

UTOPIA Level 2 Coprocessor

UTOPIA
Level 2
Receive
Interface
Receive
Module
Transmit
Module
UTOPIA
Level 2
Transmit
Interface
7.2

UTOPIA Transmit Module

The functionality supported by the Transmit Module is tightly coupled with the code
written on the Network Processor Engine. This section details the full hardware
capabilities of the Transmit Module contained within the UTOPIA Level 2 coprocessor of
August 2006
Reference Number: 306262-004US
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IXP46X Product Line of Network Processors
shows the various modules within the UTOPIA Level 2 coprocessor.
2 Cell
Receive
FIFO
64 – Byte
Receive
Buffer
64 – Byte
Receive
Buffer
2 Cell
Transmit
FIFO
64 – Byte
Transmit
Buffer
64 – Byte
Transmit
Buffer
Network
Processor
Engine
Coprocessor
Interface
® ®
Intel IXP45X and Intel IXP46X Product Line of Network Processors
®
IXP400 Software
Network
Processor
Engine
Core
B4324-01
Developer's Manual
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