9
AT89C5132
4256A–USB–06/03
Figure 4. 48 MHz Frequency Auto-generation
MAIN
USB Connected?
Suspend/Resume
Configure PLL for
Frequency X
Configure Timer 0
SOF Detected?
Timer 0 Overflow?
USB Scheduler
Change Frequency
Resume
Detected?
Yes
No
No
Yes
Yes
No
Yes
No
