Goresettoop; If Hs Device Is Connected - Epson S2R72V18 Technical Manual

1.4.10.3.10

GoRESETtoOP

The LSI hardware automatically performs the processing necessary to switch from the
"RESET" state to the "OPERATIONAL" state when "GoRESETtoOP" is set to host state
change execute (H_NegoControl_0.AutoMode).
1.4.10.3.10.1
time
HostState[2:0] Except IDLE
DetectDevChirpOK
DetectDevChirpNG
ResetCmp
Timing
Parameter
T0 Sets H_NegoControl_0.AutoMode to "GoRESETtoOP." (F/W)
Performs the same processing performed for "GoRESET." (H/W)
T1 Detects the device chirp and issues device chirp normal detection status
notification. (H/W)
T2 Issues reset completion status.
Performs the same processing performed for "GoOPERATIONAL." (H/W)
S2R72V18 Technical Manual (Rev.1.00)

If HS Device is Connected

Shown below are the procedures performed when an HS device is connected. The LSI
hardware performs steps (2) to (5) automatically.
(1) The firmware sets the host state change execute (H_NegoControl_0.AutoMode)
to "GoRESETtoOP" (T0).
(2) Performs the same processing performed for "GoRESET" (T0).
(3) Detects the device chirp and issues device chirp normal detection status
notification (H_SIE_IntStat_0.DetectDevChirpOK) (T1).
(4) Issues reset completion status (H_SIE_IntStat_1.ResetCmp) (T2).
(5) Performs the same processing performed for "GoOPERATIONAL" (T2).
Note that the timing for each state is the same as when executing "GoRESET" or
"GoOPERATIONAL." For detailed information on timing, refer to "1.4.10.3.4
GoRESET" and "1.4.10.3.5 GoOPERATIONAL," respectively.
For detailed information on procedures and timing when an error (VBUS error or
device chirp error) is detected in midcourse, refer to "1.4.10.2.2 Disconnect
Detection" and "1.4.10.2.1 VBUS Error Detection," respectively.
T0 T1
RESET
Fig. 1-69 GoRESETtoOP timing (HS mode)
Table 1-62 GoRESETtoOP timing values (HS mode)
Description
EPSON
1. Functions
T2
OPERATIONAL
Value
0 (reference)
T1
T2
147