cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 56

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

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Global Concepts and Features
3.4
A GeodeLink Device with an embedded PCI bus is illus-
trated in Figure 3-5. Note the similarity with Figure 3-4
"Typical CS5535 GeodeLink Device" on page 55. The only
difference is the PCI Adapter (PA) located in the center of
the figure. The PA allows a module designed for the PCI
bus to be easily embedded in a GeodeLink architecture. It
is used to embed the USB core into the GeodeLink archi-
tecture.
The PA provides the following features:
• Converts GLA Local Bus transactions to/from PCI bus
• Provides PCI bus configuration transactions from GLD
• Performs PCI bus protocol checking and sets the GLD
transactions.
MSR transactions.
Error Flag if appropriate.
EMBEDDED PCI ADAPTER (PA)
Registers
Native
Native
Block
Block
(NB)
Figure 3-5. CS5535 GeodeLink Device With Embedded PCI Bus
Cells &
Pads
I/O
Embedded
Interface
PCI Bus
External Device Interface
Side-band signals to other Native Blocks
(Continued)
Adapter
(PA)
PCI
56
GeodeLink Device
Interface
MSRs
Local
• Capable of responding to both single data phase as well
• Closely follows the functioning of the GLA.
• Capable of issuing retries to the master when the Local
• Safely handles all the error conditions possible during
Using the Virtual PCI Configuration Space (see Section 3.1
"GeodeLink Architecture Overview" on page 50), the Core
BIOS lifts this embedded physical interface into the multi-
function PCI configuration space header mentioned previ-
ously.
Bus
as burst transactions.
bus side is taking too long to complete the current trans-
action.
normal and configuration PCI transactions.
Adapter
(GLA)
GL
Reg In
Data In
Reg Out
Data Out
Diag
ASMI
ERR
CCU
CCU
CCU
Revision 0.8