
List of Figures
ix
21090C/0—June 1997
AMD-640 System Controller Data Sheet
Preliminary Information
List of Figures
Figure 1-1.
Figure 2-1.
Figure 2-2.
Figure 2-3.
Figure 5-1.
Figure 5-2.
Figure 5-3.
Figure 5-4.
Figure 5-5.
Figure 5-6.
Figure 5-7.
Figure 5-8.
Figure 5-9.
Figure 5-10. Pipelined EDO Read (5-2-2-2, 3-2-2-2) . . . . . . . . . . . . . . . . . 5-23
Figure 5-11. EDO Posted Write (2-2-2-2) . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
Figure 5-12. SDRAM Burst Read Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Figure 5-13. SDRAM Write Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-27
Figure 5-14. CPU Read Miss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-28
Figure 5-15. Read Miss With Modified L2 Cache Line . . . . . . . . . . . . . . 5-29
Figure 5-16. Basic PCI Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32
Figure 5-17. PCI Burst Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32
Figure 5-18. PCI Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
Figure 5-19. PCI Burst Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
Figure 5-20. Configuration Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37
Figure 5-21. Configuration Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-37
Figure 5-22. Processor Read from PCI Target . . . . . . . . . . . . . . . . . . . . . 5-38
Figure 5-23. Processor Write to PCI Target . . . . . . . . . . . . . . . . . . . . . . . 5-39
Figure 5-24. PCI Bus Initiator Read: Cache Miss . . . . . . . . . . . . . . . . . . 5-41
Figure 5-25. PCI Bus Initiator Read: Modified L1 Hit, L2 Miss. . . . . . . 5-43
Figure 5-26. PCI Bus Initiator Read: L1 Miss, Unmodified L2 Hit . . . . 5-44
Figure 5-27. PCI Bus Initiator Read: Modified L1 Hit . . . . . . . . . . . . . . 5-45
Figure 5-28. PCI Bus Initiator Write: Cache Miss . . . . . . . . . . . . . . . . . . 5-46
Figure 5-29. PCI Bus Initiator Write: L1 Hit, L2 Miss. . . . . . . . . . . . . . . 5-47
Figure 5-30. PCI Bus Initiator Write: L1 Miss, Unmodified L2 Hit . . . . 5-48
Figure 5-31. PCI Bus Initiator Write: Modified L1 Hit, L2 Hit. . . . . . . . 5-49
Figure 5-32. PCI Bus Initiator Write: L1 Miss, Modified L2 Hit . . . . . . 5-50
Figure 9-1.
CLK Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
Figure 9-2.
Setup, Hold, and Valid Delay Timing Diagram . . . . . . . . . . 9-4
Figure 12-1. 328-Pin BGA Package Preliminary Specification. . . . . . . . 12-2
AMD-640 Chipset System Block Diagram. . . . . . . . . . . . . . . 1-4
AMD-640 System Controller Block Diagram . . . . . . . . . . . . 2-3
Memory-to-PCI Buffer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
PCI-to-Memory Buffer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Posted Write Buffer Organization . . . . . . . . . . . . . . . . . . . . . 5-2
Read Buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
8-Bit Tag Cache Connections . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Cache State Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-10
Pipelined Burst Read Cycle . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
Pipelined Burst Write Cycle. . . . . . . . . . . . . . . . . . . . . . . . . 5-12
EDO DRAM Interface Example. . . . . . . . . . . . . . . . . . . . . . 5-16
SDRAM Interface Example . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
Refresh Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-19