AMD LX 800@0.9W Computer Hardware User Manual


 
566 AMD Geode™ LX Processors Data Book
GeodeLink™ PCI Bridge
33234H
6.15 GeodeLink™ PCI Bridge
The GeodeLink™ PCI Bridge (GLPCI) module provides a
PCI interface for GeodeLink Interface Unit-based designs.
The GLPCI module is composed of five major blocks:
GeodeLink Interface
FIFO/Synchronization
Transaction Forwarding
PCI Bus Interface
PCI Arbiter
The GeodeLink and PCI Bus Interface blocks provide
adaptation to the respective buses. The Transaction For-
warding block provides bridging logic.
Features
PCI Version 2.2 compliance
32-bit, 66 MHz PCI bus operation
Target support for fast back-to-back transactions
Arbiter support for three external PCI bus masters
Write gathering and write posting for in-bound write
requests
Virtual PCI header support
Delayed transactions for in-bound read requests
Zero wait state operation within a PCI burst
Dynamic clock stop/start support for GLIU and PCI clock
domains (this is not CLKRUN support)
Capable of handling out of bound transactions immedi-
ately after reset
Figure 6-58. GLPCI Block Diagram
PCI Bus Interface
PCI Bus
RequestRequest Data
PCI
Arbiter
REQ#/GNT#
MSR
Transaction Forwarding
FIFOs/Synchronization
GeodeLink™ Interface
GeodeLink™ Interface Unit 1 (GLIU1)
Clock Control
Clock Control
Clock Control