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Figure 46.
Power Management Signal Values
LH sets SYSCON1.
PULLUP_EN.
PUEN_O = 1
SUSPEND_O = 1
SHUTOFF_O = 1
DS_WAKE_REQ_ON = 1
†
SHUTOFF_O value is 0 if the LH
has set SYSCON1.SOFF_D bit
SPRU761A
Power on
PUEN_O = 0
SUSPEND_O = 1
†
SHUTOFF_O = 1
DS_WAKE_REQ_ON = 1
USB cable inserted
PUEN_O = 0
SUSPEND_O = 1
†
SHUTOFF_O = 1
DS_WAKE_REQ_ON = 0
USB cable inserted
PUEN_O =1
SUSPEND_O = 1
†
SHUTOFF_O = 1
DS_WAKE_REQ_ON = 0
USB reset
Device not powered
not attached to USB
USB cable inserted
†
LH sets SYSCON1.
PULLUP_EN.
SUSPEND_O value remains
PUEN_O =1
SUSPEND_O = 0
SHUTOFF_O = 0
DS_WAKE_REQ_ON = 0
Reset or
resume
PUEN_O =1
SUSPEND_O = 1
SHUTOFF_O = 1
DS_WAKE_REQ_ON = 1
(after DS_CHG interrupt
handling)
Universal Serial Bus (USB)
USB Device Controller
No power
Power on
1 until USB Reset is
effective (after 2,5µs).
Idle for more
than 5 ms
193
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