CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 175

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Power Management Control
5)
6)
AMD Geode™ CS5535 Companion Device Data Book
Sleep Request
SUSP#
SUSPA#
GL Device Clock Control
Sleep Acknowledge
PCI/IDE Input Control
SLEEP_X/SLEEP_Y
PCI/IDE Output Control
SLP_CLK_EN#
Note: External signals are not necessarily active high. Shown as active high for clarity.
The Geode CS5535 companion device GLCP pro-
cesses a Sleep sequence. This is done in one of the
three ways:
a) If the CLK_DLY_EN bit in GLCP_GLB_PM (MSR
5170000Bh[1]) is 0 and the CLK_DELAY value in the
GLCP_CLK_DIS_DELAY (MSR 51700008h[23:0]) is
0, then wait until the CLK_ACTIVE flags specified in
GLCP_CLK4ACK (MSR 51700013h[33:0]) have gone
to 0.
b) If the CLK_DLY_EN bit is 1 and the CLK_DELAY
value is non-zero, then wait the amount of time of the
CLK_DELAY value.
c) If the CLK_DLY_EN is 0 and the CLK_DELAY value
is non-zero, then wait as in (a) but no longer than (b).
At the completion of the wait above, de-assert the
CLK_DIS bits specified in GLCP_PMCLKDISABLE
(MSR 51700009h[33:0]) and assert Sleep Acknowl-
edge to the PMC.
Indicates a variable delay.
SLP_CLK_EN# signal must be the last control to assert because it turns off all system clocks.
Figure 5-54. PMC System Sleep Sequence
7)
8)
9)
10) An external or internal wakeup event reverses the
When the Sleep Acknowledge is received, the PMC
can optionally issue additional external generic con-
trols SLEEP_X and SLEEP_Y as well as SLP_CLK#
to turn off external clocks. The completion of this step
takes the system to S1. The system is now in Sleep.
If the Sleep Request was to enter S3 (Save-to-RAM)
then the PMC moves beyond S1 and removes main
power by de-asserting WORK_AUX and leaving
WORKING asserted. WORKING is used to power
main memory, while WORK_AUX is used for every-
thing else in the system.
If the Sleep Request was to enter S4 (Save-to-Disk) or
S5 (Soft Off) then the PMC moves beyond S1 and
removes
WORK_AUX and WORKING.
events above to bring the system back to the S0 state.
main
power
31506B
by
de-asserting
both
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