Driver Configuration Information; Format Of Driver Configuration Block - Cirrus Logic CRYSTAL LAN CS890 Technical Reference Manual

CS8900 Technical Reference Manual

3.1.2 Driver Configuration Information

The CS8900 supports random access to 16-
bit words in the through software control.
Therefore, in addtion to the configruation
data stored in the Reset Configuration
Block automatically loaded by the CS8900
after each reset, additional configuration
information can be stored in the EEPROM
and accessed by the MAC driver.
Typically, this additional configuration in-
formation includes the unique IEEE physi-
cal address for the adapter. It may also
contain device configuration information
used by the MAC driver such as hardware
version, media capabilities, and bus con-
figuration (IRQ, DMA, and memory).
3.1.3 Format of Driver Configuration
Block
Table 3.2 defines the format of the block of
configuration information (referred to as
the Driver Configuration Block) required
for use with MAC drivers provided by
Crystal. Crystal recommends all fields be
initialized to their default values before
shipping the adapter. Default values for
each field are indicated in sections 3.1.3.1
through 3.1.3.14. All reserved fields
should be set to zero.
Note: The Driver Configuration Block must
start at EEPROM word address 1Ch to en-
sure compatibility with MAC drivers sup-
plied by Crystal.
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