CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 174

• 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

5.17.3
The hardware comes up from hardware system reset in the
Full On (FO) state. As part of system initialization, the
power management MSRs (see Section 6.18.1 on page
496) are written to establish the Active Hardware Clock
Gating (AHCG) state. The AHCG state is the nominal oper-
ational state.
5.17.3.1 Sleep/Standby Sequence
Entering the states under G1 and G2 requires explicit soft-
ware action. That action starts a hardware chain of events
in which some of the chain is determined by registers that
must be programmed previous to the start of the sequence.
The block diagram of the hardware involved in this
sequence is illustrated in Figure 5-53. Figure 5-54 and Fig-
ure 5-55 graphically show the Sleep/Standby sequence.
The sequence is as follows:
174
Notes: *At least one per GeodeLink™ Device.
GeodeLink™ Device
Activity Counters
Software Power Management Actions
External I/O
PM MSR
#Global signal, one per system.
(1 of n)
GLIU
Wakeup from Standby
31506B
Power Low Indicator
System Reset if
Figure 5-53. PMC Power Management Elements
Turn Off PCI/IDE Inputs
Turn Off PCI/IDE Outputs
Clock Control
DSMI, SMI, NMI, IRQ
(with Standby power)
PML & Reset
1)
2)
3)
4)
The “explicit software action” begins with a write to
PM1_CNT (ACPI I/O Offset 08h) starting the
Sleep/Standby sequence.
The PMC issues a Sleep Request to the Geode
CS5535 companion device GLCP and it passes the
request as SUSP# to the Geode GX processor’s
GLCP.
The Geode GX processor’s GLCP issues a suspend
request to the processor. After the processor has shut-
down operation it provides a suspend acknowledge
back to the Geode GX processor’s GLCP.
The Geode GX processor’s GLCP processes a sleep
sequence similar to that described in step 5 while issu-
ing a SUSPA# to the Geode CS5535 companion
device GLCP.
AMD Geode™ CS5535 Companion Device Data Book
Sleep Request
(CIS packet)
SUSP#
Sleep Acknowledge
Internal Wakeup Events
External Wakeup and Thermal
Events including Buttons
SLEEP_X, SLEEP_Y,
SLP_CLK_EN#, WORKING,
and WORK_AUX
Power Management Control
Processor
GLCP
SUSPA#