Broadcom BCM5722 - Figure 79: ACPI Sleep States

BCM5722 Programmer’s Guide
10/15/07
Broadcom Corporation
Page 525 Advanced Configuration and Power Interface Document 5722-PG101-R
The ACPI Sleep States are subsets of the global ACPI G0–G3 states. For example, G0 working state corresponds to the S0
sleep state. The sleep states are defined in the ACPI 2.0 specification (see Figure 79):
• S0—normal working state. Devices may be in any D0–D3 state. Hot removal of devices possible.
• S1—low wake-latency sleep state. System context is preserved in this sleep state.
• S2 —low wake-latency sleep state. Memory context is preserved. All remaining system device context may be lost.
Wake event capability by devices.
• S3—low wake-latency sleep state. Similar to S2 state. Memory in low-power/refresh mode. Only devices supporting
memory are powered.
• S4—lowest power and longest wake-latency sleep state. All devices powered off. Platform context saved off, before
entry to S4 state.
• S5—soft off state. This is not a sleep state. No context is preserved, nor can be restored by OSPM. BIOS does a power
on reset when a wake event is detected.
Figure 79: ACPI Sleep States
G0
S1
S0
S2
ACPI
Boot
S4
S3
S5
G2
G1
Wake