TLE9263QX
High Speed CAN Transceiver
10.2.3
CAN Receive Only Mode
In CAN Receive Only Mode (RXD only), the driver stage is de-activated but reception is still operational. This mode
is accessible by an SPI command in Normal Mode and in Stop Mode. The bus biasing is set to VCAN/2.
10.2.4
CAN Wake Capable Mode
This mode can be used in SBC Stop, Sleep, Restart and Normal Mode and it is used to monitor bus activities.
It is automatically accessed in SBC Fail-Safe Mode. Both bus pins CANH/L are connected to GND via the input
resistors.
A wake-up signal on the bus results in a change of behavior of the SBC, as described in Table 16. The pins
CANH/L are terminated to typ. 2.5V through the input resistors. As a wake-up signalization to the microcontroller,
the RXD_CAN pin is set LOW and will stay LOW until the CAN transceiver is changed to any other mode. After a
wake-up event, the transceiver can be switched to CAN Normal Mode for communication via SPI.
As shown in Figure 29, a wake-up pattern is signaled on the bus by two consecutive dominant bus levels for at
least tWake1 (filter time t > tWake1), each separated by a recessive bus level of less than tWake2
.
Entering low-power mode,
when selective wake-up
function is disabled
or not supported
Bus recessive > tWAKE1
Ini
Wait
Bias off
Bias off
Bus dominant > tWAKE1
optional:
tWAKE2 expired
1
Bias off
Bus recessive > tWAKE1
optional:
tWAKE2 expired
2
Bias off
Bus dominant > tWAKE1
Silence expired AND
t
Entering CAN Normal
or CAN Recive Only
Device in low-power mode
3
Bias on
Bus dominant > tWAKE1
Bus recessive > tWAKE1
tSilence expired AND
device in low-power mode
4
Bias on
Figure 29 WUP detection following the definition in ISO 11898-5
Data Sheet
66
Rev. 1.1, 2014-09-26
INFINEON [ Infineon ]
