36.7.14 USB Interrupt Status Register

Table 36-14. Register Bit Attribute Legend
Symbol Description Symbol Description Symbol Description
R Readable bit HC Cleared by Hardware (Grey cell) Unimplemented
W Writable bit HS Set by Hardware X Bit is unknown at Reset
K Write to clear S Software 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
0 No interrupt
1 VBUS has dropped below the VBUS valid threshold during a session

Bit 6 – SESSREQ Session Request Interrupt bit

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

Bit 5 – DISCON Device Disconnect Interrupt bit

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

Bit 3 – SOF Start of Frame Interrupt bit

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

Bit 2 – RESET Reset/Babble Interrupt bit

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

Bit 1 – RESUME Resume Interrupt bit

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

Bit 0 – SUSPEND Suspend Interrupt bit

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