Data Sheet
71
Rev. 1.00
2017-07-31
TLE9263BQXV33
High Speed CAN Transceiver
Wake-Up in SBC Stop and Normal Mode
In SBC Stop Mode, if a wake-up is detected, it is always signaled by the INT output and in the
WK_STAT_1
SPI
register. It is also signaled by RXDCAN pulled to low. The same applies for the SBC Normal Mode. The
microcontroller should set the device from SBC Stop Mode to SBC Normal Mode, there is no automatic
transition to Normal Mode.
For functional safety reasons, the watchdog will be automatically enabled in SBC Stop Mode after a Bus wake
event in case it was disabled before (if bit
WD_EN_ WK_BUS
was configured to HIGH before).
Wake-Up in SBC Sleep Mode
Wake-up is possible via a CAN message (filter time t > t
Wake1
). The wake-up automatically transfers the SBC into
the SBC Restart Mode and from there to Normal Mode the corresponding RXD pin in set to LOW. The
microcontroller is able to detect the low signal on RXD and to read the wake source out of the
WK_STAT_1
register via SPI. No interrupt is generated when coming out of Sleep Mode. The microcontroller can now for
example switch the CAN transceiver into CAN Normal Mode via SPI to start communication.
Table 16 Action due to CAN Bus Wake-Up
SBC Mode
SBC Mode after Wake
VCC1
INT
RXD
Normal Mode
Normal Mode
ON
LOW
LOW
Stop Mode
Stop Mode
ON
LOW
LOW
Sleep Mode
Restart Mode
Ramping Up
HIGH
LOW
Restart Mode
Restart Mode
ON
HIGH
LOW
Fail-Safe Mode
Restart Mode
Ramping up
HIGH
LOW
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