W83301 Winbond Electronics Corp America, W83301 Datasheet - Page 10

• Manufacturer Part Number: W83301
• Description: Acpi-str Controller
• Manufacturer: Winbond Electronics Corp America

7.2 ACPI State Control
shown as Figure 5 to generate ACPI-compliant power state transition.
memory ACPI control, and the five states are G3 (Mechanical-Off State), S0 (Full-Power
State), S3 (Sleeping State-Suspend to RAM), S5
states changed to the other according to the condition of S3#, S5# and 5V
other hand, cause of the W83301R allows customer to disable/enable the 5V
in S5 state via 5V
state. A soft ramp-up mechanism is needed to protect the 5V
current attack during the S5
W83301R also provides soft ramp-up mechanism during S5
each STR output.
4.5V, the chip will enter S5
conditions, the one is when 5V
output, the other one is S3#=1 and S5#=1 the system will enter S1 state.
disabling the 5V
outputs into S0 state will S3#=1 and S5#=1.
(S3#=0, S5#=1) or S5-soft off (S5#=0) state when the system idle for a long time or user
power-off.
power state by (S3#=1, S5#=1,PWOK=1), or get into S5-sleeping soft off state by
(S5#=0)
Table 2. W83301R Outputs Table
*When the STR2 & STR3 configured as bus termination controller, only STR1 has linear under voltage
function.
Confidential
S5 (5V
S5 (5V
In order to meet the ACPI specification, the W83301R implement a state machine as
There are only five states in the state machine cause the W83301R only focus on the
In the state machine, when the power on, and the 5V input from power supply arrive
During S5
When the system under the S0 state, the system should enter the S3-sleeping
When the system suspend to RAM, the system will be wakeup and enter S0-full
State
G3
S0
S3
DL
DL
Off)
On)
On
SB
(Driven by
(Driven by
(Driven by
state, the chip will return back to S5
DLEN
5V
5V
output (5V
5V
5V
Off
Off
On
On
On
DLSB
DLSB
DRV
# pin, there are two states, S5
Revision 0.6
DL
)
)
)
Off
Off
DLEN
DLEN
to S5
first from G3, and ramp-up into S5
#=1) to save some power. And the chip will drive all
STR1
#=0 under standby power supply to resume the 5V
Off
Off
Off
On
On
On
state transition. Same as the 5V
8
On
STR2
Off
Off
Off
On
On
(Soft-Off State), S5
On
and S5
Off
when the customer wants
On
STR3
Off
to S0 state transition in
DL
Off
Off
Off
On
On
, corresponding to S5
output from the rush
Off
On
and all of these
DL
LUV Activity *
Preliminary
DLEN
state by two
W83301R
DUAL
output, the
#. On the
Yes
Yes
No
No
No
output
DL