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2-1
ThunderLAN Registers
ThunderLAN uses a variety of registers to perform its networking functions.
These include peripheral component interface (PCI) registers, host registers,
internal direct input/output (DIO) registers, media independent interface (MII)
registers, and physical interface (PHY) registers. Access to these is a require-
ment for setting up the ThunderLAN controller and any of the PHY devices at-
tached to the MII. They must be accessed as well for transmission, initiation,
and reception of data. Other activities which require the user to understand
ThunderLAN’s register spaces include determining the cause of event-driven
interrupts and how to clear them and diagnostic functions. This chapter ex-
plains register configurations and discusses control of these spaces through
code examples.
Topic Page
2.1 Register Addresses 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 PCI Configuration Space 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Host Registers 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Internal Registers 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 MII PHY Registers 2-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6 External Devices 2-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2