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AMD Athlon™ XP Processor Model 8 Data Sheet
Connect State
Diagram
Disconnect
Pending
5/B
Disconnect
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
8
Northbridge must not issue any non-NOP SysDC
commands for a minimum of four SYSCLK periods after
deasserting CLKFWDRST.
Figure 6. Northbridge Connect State Diagram
16
Preliminary Information
Figure 6 below and Figure 7 on page 17 show the Northbridge
and processor connect state diagrams, respectively.
2/A
3/C
Reconnect
7/D,C
6/C
Pending 1
Condition
Power Management
4/A
1
Connect
3
8
Pending
Probe
Deassert CONNECT eight SYSCLK periods
A
after last SysDC sent.
B Assert CLKFWDRST.
C Assert CONNECT.
D Deassert CLKFWDRST.
25175H—March 2003
Disconnect
Requested
8
Probe
Pending 2
7/D
Action
Chapter 4
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