37.7.14 USB Interrupt Status Register

Table 37-16. Register Bit Attribute Legend
SymbolDescriptionSymbolDescriptionSymbolDescription
RReadable bitHCCleared by Hardware(Grey cell)Unimplemented
WWritable bitHSSet by HardwareXBit is unknown at Reset
KWrite to clearSSoftware settable bit——
Name: INTRUSB
Offset: 0x100A
Reset: 0x0000
Property: PAC Write-Protection

Bit 76543210 
 VBUSERRSESSREQDISCONCONNSOFRESETRESUMESUSPEND 
Access RRRRRRRR 
Reset 00000000 

Bit 7 – VBUSERR VBUS Error Interrupt Bit

ValueDescription
0No interrupt
1VBUS has dropped below the VBUS valid threshold during a session

Bit 6 – SESSREQ Session Request Interrupt bit

ValueDescription
0No session request detected
1Session request signaling has been detected

Bit 5 – DISCON Device Disconnect Interrupt bit

ValueDescription
0No device disconnect detected
1In Host mode, indicates when a device disconnect is detected. In Device mode, indicates when a session ends.

Bit 4 – CONN Device Connection Interrupt bit

ValueDescription
0No device connection detected
1In Host mode, indicates when a device connection is detected

Bit 3 – SOF Start of Frame Interrupt bit

ValueDescription
0No start of frame detected
1A new frame has started

Bit 2 – RESET Reset/Babble Interrupt bit

ValueDescription
0No reset/babble detected
1In Host mode, indicates babble is detected. In Device mode, indicates reset signaling is detected on the bus.

Bit 1 – RESUME Resume Interrupt bit

ValueDescription
0No Resume signaling detected
1Resume signaling is detected on the bus while USB module is in Suspend mode

Bit 0 – SUSPEND Suspend Interrupt bit

ValueDescription
0No suspend signaling detected
1Suspend signaling is detected on the bus (Device mode)