W89C841F Datasheet, PDF (40/102 Pages) Winbond – 3-IN - 1 10/100M FAST ETHERNET CONTROLLER

W89C841F/D
F28/FCISPR CardBus CIS Pointer Register
This register identifies the location of the Card Information Structure (CIS). In W89C841F, CIS data
can be stored in EEPROM or BootROM. CIS pointer value is loaded from EEPROM.
BIT
31:28
27:3
2:0
ATTRIBUTE
R
R
R
BIT NAME
RIN
ASO
ASI
DESCRIPTION
ROM Image Number
This field defines the ROM image number (0-Fh) in which
the CIS is located. The offset value is added to the start of
the ROM image to identify the start of the CIS.
Address Space Offset
This field defines which space the CIS resides within.
Memory space: This is the offset into the memory address
space governed by Base Address Register F18/FMBA.
Adding this value to the value in the Base Address Register
gives the location of the start address of the CIS. Bits ASO
is fixed to 80h.
Expansion ROM space: The offset value is from the start of
the ROM image identified by bits RIN.
Address Space Indicator
Specifies the base address within the space indicated. The
offset bits ASO is added to this base address to identify the
start of the CIS. The address indicators values are:
3 = CIS is in the memory pointed to by the base address
register 2.
7 = CIS is in the Boot ROM. Bits RIN identify which Boot
ROM image.
Other values are reserved.
F2C/FSSID Subsystem ID Register
This register stores the Subsystem ID and Subsystem Vendor ID.
BIT
31:16
15:0
ATTRIBUTE
R
R
BIT NAME
SBID
SBVID
DESCRIPTION
Subsystem ID
Loaded from EEPROM.
Subsystem Vendor ID
Loaded from EEPROM.
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