MOTOROLA
Chapter 8. The 60x Bus
8-9
Part III. The Hardware Interface
Figure 8-4. Address Bus Arbitration with External Bus Master
8.4.2 Address Pipelining
The MPC8260 supports one-level address pipelining by asserting AACK to the current bus
master when its data tenure starts and by granting the address bus to the next requesting
device before the current data bus tenure completes. Address pipelining improves data
throughput by allowing the memory-control hardware to decode a new set of address and
control signals while the current data transaction Þnishes. The MPC8260 pipelines data bus
operations in strict order with the associated address operations. Figure 8-5 shows how
address pipelining allows address tenures to overlap the associated data tenures.
CLKOUT
BR INT
BG INT
MPC8260
BR
BG
ABB
ADDR+
MPC8260
External
External
TS
AACK
ARTRY
Summary of Contents for MPC8260 PowerQUICC II
Page 1: ...MPC8260UM D 4 1999 Rev 0 MPC8260 PowerQUICC II UserÕs Manual ª ª ...
Page 66: ...lxvi MPC8260 PowerQUICC II UserÕs Manual MOTOROLA ...
Page 88: ...1 18 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part I Overview ...
Page 120: ...2 32 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part I Overview ...
Page 138: ...Part II iv MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part II Configuration and Reset ...
Page 184: ...4 46 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part II ConÞguration and Reset ...
Page 202: ...Part III vi MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 266: ...8 34 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 382: ...10 106 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 392: ...11 10 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part III The Hardware Interface ...
Page 430: ...Part IV viii MOTOROLA Part IV Communications Processor Module ...
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Page 524: ...17 10 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Part IV Communications Processor Module ...
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Page 980: ...A 4 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA Appendixes ...
Page 1002: ...Index 22 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA INDEX ...
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