LM3S3W26 Datasheet, PDF (745/877 Pages) Texas Instruments – Stellaris® LM3S3W26 Microcontroller

Stellaris^® LM3S3W26 Microcontroller
Register 7: USB General Interrupt Status (USBIS), offset 0x00A
Important: This register is read-sensitive. See the register description for details.
USBIS is an 8-bit read-only register that indicates which USB interrupts are currently active. All
active interrupts are cleared when this register is read.
USB General Interrupt Status (USBIS)
Base 0x4005.0000
Offset 0x00A
Type RO, reset 0x00
7
6
5
4
3
reserved
SOF
Type RO
RO
RO
RO
RO
Reset
0
0
0
0
0
2
1
0
RESET RESUME SUSPEND
RO
RO
RO
0
0
0
Bit/Field
7:4
3
Name
reserved
SOF
Type
RO
RO
Reset
0x0
0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Start of Frame
Value Description
1 A new frame has started.
0 No interrupt.
2
RESET
RO
0
RESET Signaling Detected
Value Description
1 RESET signaling has been detected on the bus.
0 No interrupt.
1
RESUME
RO
0
RESUME Signaling Detected
Value Description
1 RESUME signaling has been detected on the bus while the
USB controller is in SUSPEND mode.
0 No interrupt.
This interrupt can only be used if the USB controller's system clock is
enabled. If the user disables the clock programming, the USBDRRIS,
USBDRIM, and USBDRISC registers should be used.
0
SUSPEND
RO
0
SUSPEND Signaling Detected
Value Description
1 SUSPEND signaling has been detected on the bus.
0 No interrupt.
January 21, 2012
745
Texas Instruments-Production Data