AMSN2800DUT4C datasheet(29/102 Pages) AMD

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Chapter 4

Power Management

26426C—October 2003

AMD Athlon™ MP Processor Model 10 Data Sheet for Multiprocessor Platforms

Preliminary Information

Connect State

Diagram

Figure 5 below and Figure 6 on page 18 show the Northbridge

and processor connect state diagrams, respectively.

Figure 5. Northbridge Connect State Diagram

Condition

1 A disconnect is requested and probes are still pending.

2 A disconnect is requested and no probes are pending.

3 A Connect special cycle from the processor.

4 No probes are pending.

5 PROCRDY is deasserted.

6 A probe needs service.

7 PROCRDY is asserted.

Three SYSCLK periods after CLKFWDRST is deasserted.

Although reconnected to the system interface, the

Northbridge must not issue any non-NOP SysDC

commands for a minimum of four SYSCLK periods after

deasserting CLKFWDRST.

Action

Deassert CONNECT eight SYSCLK periods

after last SysDC sent.

B Assert CLKFWDRST.

C Assert CONNECT.

D Deassert CLKFWDRST.

Disconnect

Pending

Connect

Disconnect

Requested

Reconnect

Pending

Probe

Pending 2

Disconnect

Probe

Pending 1

2/A

4/A

5/B

3/C

7/D,C

6/C

7/D

AMSN2800DUT4C Datasheet(PDF) 29 Page - Advanced Micro Devices

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