19
BUSEVENTIRQ, BUSEVENTIE
Meaning:
BUSEVENTIRQ
:
One of two bus events has occurred.
BUSEVENTIE:
Enable
the
BUSEVENTIRQ.
Mode:
Host only
The SIE sets the BUSEVENTIRQ bit when it completes signaling one of two USB bus events:
Bus Reset (when BUSRST 1
→
0)
Bus Resume (when BUSRSM 1
→
0)
The CPU clears the BUSEVENTIRQ bit by writing a 1 to it.
The CPU sets and clears the BUSEVENTIE bit. When BUSEVENTIE = 1, the BUSEVENTIRQ
is enabled as a source to activate the INT pin.
Programming Notes
This interrupt is shared by two sources: completion of bus reset signaling, or bus resume
signaling. As this is a shared interrupt, it is good practice to clear the BUSEVENTIRQ bit before
initiating either of the two bus signals (before setting BUSRST = 1 or BUSREM = 1).