Hand shake between controller and device
during wake-up as follows:
- t0: Controller - nSLEEP asserted high
to initiate device wake-up
- t1: Device internal state - Wake-up
command registered by device (end of Sleep state)
- t2: Device – nFAULT asserted low to
acknowledge wake-up and indicate device ready for communication
- t3: Device internal state -
Initialization complete. nFAULT de-asserted. Device in STANDBY state.
Hand shake between controller and device
during wake-up as follows:
- t0: Controller - nSLEEP asserted high
to initiate device wake-up
- t1: Device internal state - Wake-up
command registered by device (end of Sleep state)
- t2: Device – nFAULT asserted low to
acknowledge wake-up and indicate device ready for communication
- t3: Device internal state -
Initialization complete
- t4 (any time after t3):
Controller – Issue nSLEEP reset pulse to acknowledge device
wake-up
- t5: Device - nFAULT de-asserted as an
acknowledgment of nSLEEP reset pulse. Device in STANDBY state.
Hand shake between controller and device during power-up as follows:
- t0: Device internal state - POR asserted based on under voltage on
VDD (external supply)
- t1: Device internal state – POR de-asserted based on recovery of
voltage on VDD (external supply)
- t2: Device – nFAULT asserted low to acknowledge wake-up and indicate
device ready for communication
- t3: Device internal state - Initialization complete. nFAULT
de-asserted. Device in STANDBY state.
Hand shake between controller and device during power-up as follows:
- t0: Device internal state - POR asserted
based on under voltage on VDD (external supply)
- t1: Device internal state – POR
de-asserted based on recovery of voltage on VDD (external supply)
- t2: Device – nFAULT asserted low to
acknowledge wake-up and indicate device ready for communication
- t3: Device internal state -
Initialization complete
- t4 (any time after t3): Controller
– Issue nSLEEP reset pulse to acknowledge device power-up
- t5: Device - nFAULT de-asserted as an
acknowledgment of nSLEEP reset pulse. Device in STANDBY state.