IBM PowerPC 750GX User Manual page 14

User's Manual
IBM PowerPC 750GX and 750GL RISC Microprocessor
Figure 8-5. First Level Address Pipelining ..............................................................................................287
Figure 8-6. Address-Bus Arbitration ........................................................................................................290
Figure 8-7. Address-Bus Arbitration Showing Bus Parking ....................................................................291
Figure 8-8. Address-Bus Transfer ...........................................................................................................293
Figure 8-9. Snooped Address Cycle with ARTRY ..................................................................................301
Figure 8-10. Data-Bus Arbitration .............................................................................................................302
Figure 8-11. Normal Single-Beat Read Termination .................................................................................304
Figure 8-12. Normal Single-Beat Write Termination .................................................................................305
Figure 8-13. Normal Burst Transaction .....................................................................................................305
Figure 8-14. Termination with DRTRY ......................................................................................................306
Figure 8-15. Read Burst with TA Wait States and DRTRY .......................................................................307
Figure 8-16. MEI Cache-Coherency Protocol-State Diagram (WIM = 001) ...........................................309
Figure 8-17. Fastest Single-Beat Reads ...................................................................................................310
Figure 8-18. Fastest Single-Beat Writes ...................................................................................................311
Figure 8-19. Single-Beat Reads Showing Data-Delay Controls ...............................................................312
Figure 8-20. Single-Beat Writes Showing Data-Delay Controls ................................................................313
Figure 8-21. Burst Transfers with Data-Delay Controls ............................................................................314
Figure 8-22. Use of Transfer Error Acknowledge (TEA) ...........................................................................315
Figure 8-23. 32-Bit Data-Bus Transfer (8-Beat Burst) ..............................................................................317
Figure 8-24. 32-Bit Data-Bus Transfer (2-Beat Burst with DRTRY) ..........................................................317
Figure 8-25. IEEE 1149.1a-1993 Compliant Boundary-Scan Interface ....................................................320
Figure 8-26. Data-Bus Write-Only Transaction .........................................................................................320
Figure 9-1. L2 Cache ..............................................................................................................................327
Figure 10-1. 750GX Power States ............................................................................................................336
Figure 10-2. Dual PLL Block Diagram ......................................................................................................342
Figure 10-3. Dual PLL Switching Example, 3X to 4X ................................................................................343
Figure 10-4. Thermal Assist Unit Block Diagram ......................................................................................344
Figure 10-5. Instruction Cache Throttling Control SPR Diagram ..............................................................347
Figure 11-1. 750GX IEEE 1149.1a-1993/COP Organization ....................................................................358
Figure 11-2. Reset Sequence ...................................................................................................................360
List of Figures
Page 14 of 377
750gx_umLOF.fm.(1.2)
March 27, 2006