PRIXP425BB Intel, PRIXP425BB Datasheet - Page 17

• Manufacturer Part Number: PRIXP425BB
• Description: IC NETWRK PROCESSR 266MHZ 492BGA
• Manufacturer: Intel

Specifications of PRIXP425BB

• Processor Type: Network
• Features: XScale Core
• Speed: 266MHz
• Voltage: 1.3V
• Mounting Type: Surface Mount
• Package / Case: 492-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 869046

Non-Core Errata
1.
Problem:
Implication:
Workaround:
Status:
2.
Problem:
Implication:
Workaround:
Status:
3.
Problem:
Implication:
Workaround:
Status:
4.
Problem:
Intel
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
PCI Doorbell Register Does Not Work Properly (SCR 460)
When a PCI agent external to the IXP425 network processor performs a read of the PCI Controller
Control and Status Register — contained in the IXP425 network processor — by targeting the
processor’s PCI BAR4, the IXP425 network processor may retry the PCI-read operation for an
extended period of time before returning the data to the agent. The processor may retry the reads
indefinitely. Therefore, reads of PCI Controller Control and Status Registers — from the IXP425
network processor’s PCI bus — are not supported. This errata does apply to the Intel
Control Plane Processor A0 stepping.
The PCI Doorbell Register support on the IXP425 network processor is not accessible.
A register can be initialized in SDRAM of the IXP425 network processor and serve as the Doorbell
Status Register. When an interrupt occurs to the external PCI agent, the external PCI agent does a
target read of this location in the SDRAM of the IXP425 network processor.
Fixed.
UTOPIA Interface Status Collection Synchronization Issues (SCR 485)
There is a synchronization issue in the UTOPIA receive logic that causes incorrect
UTOPIA-receive statistics to be gathered. This issue affects the cell count, idle-cell count,
HEC-error count, parity-error count, and cell-size error count. This errata does not apply to the
Intel
This could have impact on MIB counters that may be used for SNMP functionality.
None.
Fixed.
No Byte Enables Asserted During a PCI I/O Read of the Intel
Network Processor Causes Unpredictable Behavior (SCR 469)
When a PCI agent external to the IXP425 network processor performs an I/O read directed towards
the IXP425 network processor by targeting the processor’s PCI BAR5, with all byte enables
de-asserted (PCI_CBE_N(3:0) = 0xF), the behavior of the IXP425 network processor’s PCI
interface may become unpredictable, including continuous retry responses on both the PCI bus and
the AHB bus internal to the IXP425 network processor. This errata does apply to the Intel
IXC1100 Control Plane Processor A0 stepping.
PCI I/O reads directed towards the IXP425 network processor with all byte enables de-asserted are
not supported.
When the IXP425 network processor is placed into this state of operation, a reset to the IXP425
network processor is required.
Fixed.
Simultaneous AHB Access of the PCI Bus Controller (SCR 499)
When two internal AHB masters attempt direct accesses of the same address in PCI memory space,
the PCI Controller AHB Slave interface’s behavior may become unpredictable, including
continuous retry responses on the AHB bus. When a PCI-controller DMA channel is active at the
®
IXC1100 Control Plane Processor.
Non-Core Errata
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IXP425
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IXC1100
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