Data Sheet
70
Rev. 1.00
2017-07-31
TLE9263BQXV33
High Speed CAN Transceiver
Figure 29 WUP detection following the definition in ISO 11898-2:2016
Rearming the Transceiver for Wake Capability
After a BUS wake-up event, the transceiver is woken. However, the
CAN
transceiver mode bits will still show
wake capable (=‘01’) so that the RXD signal will be pulled low. There are two possibilities how the CAN
transceiver’s wake capable mode is enabled again after a wake event:
•
The CAN transceiver mode must be toggled, i.e. switched from Wake Capable Mode to CAN Normal Mode,
CAN Receive Only Mode or CAN Off, before switching to CAN Wake Capable Mode again.
•
Rearming is done automatically when the SBC is changed to SBC Stop, SBC Sleep, or SBC Fail-Safe Mode
to ensure wake-up capability.
Note: It is not necessary to clear the CAN wake-up bit
CAN_WU
to become wake capable again. It is sufficient to
toggle the CAN mode.
Note:
The CAN module is supplied by an internal voltage when in CAN Wake Capable Mode, i.e. the module
must not be supplied through the VCAN pin during this time. Before changing the CAN Mode to
Normal Mode, the supply of VCAN has to be activated first.
Ini
Bias off
1
Bias off
2
Bias off
3
Bias on
4
Bias on
Wait
Bias off
Bus recessive > t
WAKE1
Bus dominant > t
WAKE1
optional:
t
WAKE2
expired
Bus recessive > t
WAKE1
Bus dominant > t
WAKE1
Bus recessive > t
WAKE1
Bus dominant > t
WAKE1
optional:
t
WAKE2
expired
t
Silence
expired AND
Device in low-power mode
t
Silence
expired AND
device in low-power mode
Entering CAN Normal
or CAN Recive Only
Entering low -power mode ,
when selective wake-up
function is disabled
or not supported
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