GD82559C S L3DF Intel, GD82559C S L3DF Datasheet - Page 78

• Manufacturer Part Number: GD82559C S L3DF
• Manufacturer: Intel

Specifications of GD82559C S L3DF

• Lead Free Status / Rohs Status: Not Compliant

82559 — Networking Silicon
8.2.16
70
Modem Support in PCI Mode
The 82559 C-step supports modem interface in PCI mode. The Modem Enable (MDM) bit in the
EEPROM can be activated in PCI systems without the loss of BootROM support. In addition,
BootROM support has been simplified. The 82559 C-step supports the co-existence of a BootRom
Flash device and a modem device (using CFCS# with external glue logic). This is done by setting
the MDM bit and clearing the Boot Disable (BD) bit in the EEPROM. With this configuration, both
the modem function and BootRom BAR are active. The selection between the two functions is
done through the Boot Enable bit (the least significant bit of BootRom BAR in the LAN PCI
Configuration space). The 82559 will not support a LAN/modem design if additional companion
ASICs are operating on the Flash/modem interface. This limitation does not affect companion
ASICs that reside on the SMB interface of the 82559.
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