Utopia/Ethernet Configuration Options; Npe-B Ethernet Configuration Options; Npe-C Ethernet Configuration Options - Intel IXP45X Developer's Manual

Expansion Bus Controller—Intel
Processors
equals a '1'. Once software detects that the NPE has been reset, software then can
clear the appropriate bits of the EXP_UNIT_FUSE_RESET register to deassert reset to
that NPE.
When software does a NPE reset, the coprocessor interfaces that are attached to that
NPE could enter reset at any time, even during the middle of a data transfer. The
system design must account for this abrupt reset on these busses. After being reset,
the coprocessor interfaces will go back to the default reset mode for that interface.
Additionally, the Intel XScale processor factory speed cannot be changed by software.
Table 232.

UTOPIA/Ethernet Configuration Options

NPE-A
UTOPIA
Ethernet
Fuse
Fuse
0 0
0 1
1 0
1 0
1 1
Table 233.

NPE-B Ethernet Configuration Options

NPE-B NPE-B
Ethernet 0 Ethernet 1-
Fuse 3 Fuse
0 0
0 1
1 0
1 1
0 0
0 1
Table 234.

NPE-C Ethernet Configuration Options

NPE-C
Ethernet
Fuse
0
0
1
August 2006
Order Number: 306262-004US
® ®
IXP45X and Intel IXP46X Product Line of Network
NPE-A SMII
Config Bit
UTOPIA interface enabled on NPE-A. NPE-A ethernet interface is disabled. When
0
the UTOPIA interface is enabled, the NPE-A SMII config bit must be 0.
UTOPIA interface enabled on NPE-A. NPE-A ethernet interface is disabled. When
0
the UTOPIA interface is enabled, the NPE-A SMII config bit must be 0.
0 UTOPIA interface is disabled. NPE-A ethernet interface is enabled in MII mode.
1 UTOPIA interface is disabled. NPE-A ethernet interface is enabled in SMII mode.
X UTOPIA interface is disabled. NPE-A ethernet interface is disabled.
NPE-B SMII
Config Bit
0 NPE-B Ethernet 0 is enabled in MII mode. NPE-B Ethernet 1-3 is disabled.
NPE-B Ethernet 0 is enabled in MII mode. NPE-B Ethernet 1-3 is disabled and
0
clock gated.
X Illegal mode and will result in unpredictable operation.
X NPE-B Ethernet 0 is disabled. NPE-B Ethernet 1-3 is disabled and clock gated.
1 NPE-B Ethernet 0 and Ethernet 1-3 are enabled in SMII mode.
NPE-B Ethernet 0 is enabled in SMII mode. NPE-B Ethernet 1-3 is disabled and
1
clock gated.
NPE-C SMII
Config Bit
0 NPE-C Ethernet is enabled in MII mode.
1 NPE-C Ethernet is enabled in SMII mode.
X NPE-C Ethernet is disabled.
Intel
Operation
Operation
Operation
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IXP45X and Intel IXP46X Product Line of Network Processors
Developer's Manual
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