Gosuspendtoop - Epson S2R72V18 Technical Manual

1.4.10.3.11

GoSUSPENDtoOP

The LSI hardware automatically performs the processing necessary to switch from the
"SUSPEND" state to the "OPERATIONAL" state when "GoSUSPENDtoOP" is set to host
state change execute (H_NegoControl_0.AutoMode).
The remote wakeup detection function is automatically enabled or disabled by the hardware
when "GoSUSPENDtoOP" is set (although this is not shown by remote wakeup receipt
permission (H_NegoControl_1.RmtWkupDetEnb)). There is no need for the firmware to
manipulate the remote wakeup receipt permission (H_NegoControl_1.RmtWkupDetEnb).
Avoid using the power management function with this setting.
Shown below are the procedures for this setting. The LSI hardware performs steps (2) to (7)
automatically.
(1) The firmware sets the host state change execute (H_NegoControl_0.AutoMode) to
(2) Performs the same processing performed for "GoSUSPEND" (T0).
(3) Issues suspend change completion status notification (H_SIE_IntStat_1.SuspendCmp)
(4) Detects the remote wakeup and issues remote wakeup detection status notification
(5) Performs the same processing performed for "GoRESUME" (T2).
(6) Issues resume completion status (H_SIE_IntStat_1.ResumeCmp) (T3).
(7) Performs the same processing performed for "GoOPERATIONAL" (T3).
time
HostState[2:0] OPERATIONAL
SuspendCmp
DetectRmtWkup
ResumeCmp
S2R72V18 Technical Manual (Rev.1.00)
"GoSUSPENDtoOP" (T0).
(T1).
(H_SIE_IntStat_0.DetectRmtWkup) (T2).
T0 T1
SUSPEND
Fig. 1-71 GoSUSPENDtoOP timing
T2
RESUME
EPSON
1. Functions
T3
OPERATIONAL
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