AMD SDA3000AI02BA Datenblatt PDF herunterladen (Seite 29)

Chapter 4 Power Management 17

31993A-1 September 2004 AMD Sempron™ Processor Model 10 Data Sheet

AMD Preliminary Information

Figure 7. Processor Connect State Diagram

Condition

CONNECT is deasserted by the Northbridge (for a

previously sent Halt or Stop Grant special cycle).

Processor receives a wake-up event and must cancel

the disconnect request.

3 Deassert PROCRDY and slow down internal clocks.

Processor wake-up event or CONNECT asserted by

Northbridge.

5 CLKFWDRST is deasserted by the Northbridge.

Forward clocks start three SYSCLK periods after

CLKFWDRST is deasserted.

Action

A CLKFWDRST is asserted by the Northbridge.

B Issue a Connect special cycle.*

Return internal clocks to full speed and assert

PROCRDY.

Note:

The Connect special cycle is only issued after a

processor wake-up event (interrupt or STPCLK#

deassertion) occurs. If the AMD Athlon™ system

bus is connected so the Northbridge can probe the

processor, a Connect special cycle is not issued at

that time (it is only issued after a subsequent

processor wake-up event).

Connect

Disconnect

Pending

Disconnect

Connect

Pending 1

Connect

Pending 2

3/A

4/C

6/B

2/B

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 101 102

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