AT89C5131A-L Datasheet, PDF (131/186 Pages) ATMEL Corporation – 8-bit Flash Microcontroller with Full Speed USB Device

AT89C5131A-L
Figure 66. Example of a Suspend/Resume Management
USB Controller Init
SPINT
Detection of a SUSPEND State
Clear SPINT
Set SUSPCLK
Disable PLL
microcontroller in Power-down
WUPCPU
Detection of a RESUME State
Enable PLL
Clear SUSPCLK
Clear WUPCPU Bit
4338F–USB–08/07
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