cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 96

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

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4.6
The Diverse Integration Logic (DIVIL) connects a series of
Local bus devices to the GeodeLink architecture. Figure 4-
10 illustrates how the DIVIL (within the dashed lines) inter-
faces with the other devices of the Diverse Device. The
main blocks of the DIVIL are: Address Decode, Standard
MSRs, Local BARs, and Dataout Mux (DOM).
*
Data Out Mux not shown.
DIVIL
DIVERSE INTEGRATION LOGIC
Legacy Decode MSRs
Local Bus Interface
Address
Address Decode
Master Addr
GLIU Interface
RO Packet
Arguments
from MSR
Hits
Local Bus
Handshake
Enables
& Byte
and
Miscellaneous
Local BARs,
Compares,
Standard
MSRs
and
Slave Addr
Chip
Selects
Data Out
Enables
Data In
& Byte
Figure 4-10. Diverse Logic Block Diagram
RI
GeodeLink Adapter
DI
96
• Address Decode - Decodes the upper Local bus
*
address bits to select a target slave. Most of the legacy
devices have fixed addresses or are selectable between
a small number of selectable I/O addresses. However,
many of the functions are relocatable via a Local Base
Address Register (LBAR); established via an MSR.
Address Decode also detects special GLIU cycles, such
as Shutdown, and takes appropriate action.
DO
RO
Flash Interfaces
(2) UART & IR
NOR & NAND
8254 & Port B
System Mgmt
RTC & CMOS
MFGP Timers
(2) 8259A &
Kybd Emu &
Bus Control
GPIO & ICF
Pwr Mgmnt
and Control
(2) 8237 &
DMA Map
IRQ Map
LPC Bus
Control
Port A
RAM
Req/Ack
Address
External
I/O
External
I/O
External
I/O
External
I/O
External
I/O
Revision 0.8