Epson S2R72V18 Technical Manual page 112

Timing
Parameter
T0 VBUSFLG_A (external USB power switch error occurrence
flag) input terminal changes to L (error).
VBUS error detection status notification
(USB_HostIntStat.VBUS_Err) is issued. (H/W)
T1 Write 0x01 to change to "IDLE" state after writing 0x80 to
(reference) H_NegoControl_0. (F/W)
S2R72V18 Technical Manual (Rev.1.00)
Table 1-33 VBUS error detection timing values
Description
EPSON
1. Functions
Value
0 (reference)
T1
95