Figure 24: USB Low Power Mode Communication Sequence
5.4 How to Recover from Low Power Mode
To recover from low power mode, you need to consider conditions such as the signal to use and
timing. For more information, see “Low Power” on page 41.
5.4.1 Recover from Low Power Mode by Signal (UART)
You can use a signal (TRIGn, CTS, and AIM/WAKEn) to recover from low power mode.
If you need to send additional commands, they will be accepted when the RTS or
POWERDOWN signal becomes low.
Successful reading
USB
Remote wakeup
Resume (SOF, Token, etc.)
Data
Low Power
Scanning
USB
Standby
Suspend
Active
Selective suspend
Low Power
Suspend
USB bus shifted to SUSPEND state
Recovery signal or command
Scan Engine
USB Host
Low power transition time