PCI1210GGU Datasheet, PDF (51/128 Pages) Texas Instruments – PCI1210 GGU/PGE PC CARD CONTROLLERS

PCI1210 GGU/PGE
PC CARD CONTROLLERS
SCPS032A– APRIL 1998
PCI bus number register
Bit
7
6
5
4
3
2
1
0
Name
PCI bus number
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
Register: PCI bus number
Type:
Read/write
Offset:
18h
Default: 00h
Description: This read/write register is programmed by the host system to indicate the bus number of the
PCI bus to which the PCI1210 is connected. The PCI1210 uses this register in conjunction
with the CardBus bus number and subordinate bus number registers to determine when to
forward PCI configuration cycles to its secondary buses.
CardBus bus number register
Bit
7
6
5
4
3
2
1
0
Name
CardBus bus number
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
Register: CardBus bus number
Type:
Read/write
Offset:
19h
Default: 00h
Description: This read/write register is programmed by the host system to indicate the bus number of the
CardBus bus to which the PCI1210 is connected. The PCI1210 uses this register in
conjunction with the PCI bus number and subordinate bus number registers to determine
when to forward PCI configuration cycles to its secondary buses.
subordinate bus number register
Bit
7
6
5
4
3
2
1
0
Name
Subordinate bus number
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
Register: Subordinate bus number
Type:
Read/write
Offset:
1Ah
Default: 00h
Description: This read/write register is programmed by the host system to indicate the highest-numbered
bus below the CardBus bus. The PCI1210 uses this register in conjunction with the PCI bus
number and CardBus bus number registers to determine when to forward PCI configuration
cycles to its secondary buses.
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