Datasheet

119
4341H–MP3–10/07
AT8xC51SND2C/MP3B
Figure 16-14. Example of REMOTE WAKEUP Management
16.11 USB Interrupt System
16.11.1 Interrupt System Priorities
Figure 16-15. USB Interrupt Control System
USB Controller Init
Detection of a SUSPEND state
SPINT
Set RMWUPE
Suspend Management
enable clocks
upstream RESUME sent
UPRSM
Clear SPINT
Set SDMWUP
Clear SDRMWUP
SET_FEATURE: DEVICE_REMOTE_WAKEUP
need USB resume
UPRSM = 1
EUSB
IE1.6
EA
IE0.7
USB
Controller
IPH/L
Interrupt Enable Lowest Priority InterruptsPriority Enable
00
01
10
11
D+
D-