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The Port Configure register (A through D) enables or
disables the 10Base - X CRC check facility. If the facility
is enabled, 10Base - X packets found to have CRC errors
will not have their Source address processed. If the facility
is disabled, the Source address of 10Base - X packets are
processed regardless of CRC errors, assuming the PTARG
register is configured appropriately.
Each MU9C8358L supports four ports. Those ports are
addressed as an offset to the CHIP_BASE for the
MU9C8358L in which they are implemented. Table 23
shows the Port registers and their address values.
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The Port ID register (A through D) stores the ID
associated with each of the four ports in a MU9C8358L.
The 6-bit value is the value added to LANCAM entries
when the SA search routine is performed. It is important to
note that when two devices are used to provide support for
eight ports, the eight Port_ID registers are given different
values.
This register only enables a CRC check for 10Base - X
packets. The facility should be disabled (bit 1=0) for
100Base - X packets.
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MUSIC [ MUSIC SEMICONDUCTORS ]
