Error Device Chirp Detection; If Chirp Completion Disable (H_Negocontrol_1.Dischirpfinish) Setting Is 0 - Epson S2R72V18 Technical Manual

1.4.10.3.4.2
1.4.10.3.4.2.1
S2R72V18 Technical Manual (Rev.1.00)

Error Device Chirp Detection

This section discusses operations taken if an error device chirp is detected in the HS
Detection Handshake. One of two operating modes can be selected, depending on the
chirp completion disable (H_NegoControl_1.DisChirpFinish) setting.
If Chirp Completion Disable (H_NegoControl_1.DisChirpFinish) Setting
is 0
Host chirping is not performed following error detection. If a device chirp error
detection status notification is issued, the firmware awaits reset completion
status notification (H_SIE_IntStat_1.ResetCmp), then sets the host state change
execute (H_NegoControl_0.AutoMode) to "GoDISABLED" before changing
the host state to "DISABLED." The LSI hardware automatically performs steps
(2) to (9) below.
(1) The firmware sets the host state change execute
(H_NegoControl_0.AutoMode) to "GoRESET" (T0).
(2) Sets the host state monitor (H_NegoControl_0.HostState) to "RESET"
(T0).
(3) Sets the transceiver selection (H_XcvrControl.XcvrSelect) and terminal
selection (H_XcvrControl.TermSelect) to HS mode (T0).
(4) Sets the operating mode (H_XcvrControl.OpMode[1:0]) to "Normal" (T0).
(5) Enables the device chirp detection function (T0).
(6) The device chirp is recognized if activity ("J" state) is detected in the line
state (H_USB_Status.LineState[1:0]) for at least 2.5 µs. However, an error
is assumed if the device chirp fails to terminate within the specified
duration after the reset starts, and a device chirp error detection status
notification (H_SIE_IntStat_0.DetectDevChirpNG) is issued (T2).
(7) Disables the device chirp detection function (T2).
(8) Reset is ended (T3).
(9) Issues reset completion status notification (H_SIE_IntStat_1.ResetCmp)
(T3).
EPSON
1. Functions
121