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8.5.2 Remote wakeup control operation
Figure 8-21. Flow Chart of Remote Wakeup Control Operation
Resume
output
Resume output
completion
PULLDP:
Bit 2 of remote wakeup control register (REMWUP)
PULLDM:
Bit 3 of remote wakeup control register (REMWUP)
PULLEN:
Bit 1 of remote wakeup control register (REMWUP)
WAKEUP: Bit 0 of remote wakeup control register (REMWUP)
CHAPTER 8
Idle state
Resume output
started?
Y
Is bus idle
duration longer
than 5 ms?
Y
PULLDP = 0
PULLDM = 1
A ← 00000111B
Note 1
PULLEN = 1
WAKEUP = 1
REMWUP ← A
10 ms to 15 ms
elapsed?
Y
WAKEUP = 0
Note 2
PULLEN =0
PULLDP = 0
PULLDM = 1
Idle state
User's Manual U12978EJ3V0UD
USB FUNCTION
N
Did HOST
N
output USB reset or
Resume?
PULLDP = 0
PULLDM = 1
Idle state
N
N
Y
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