TLE6251DS Datasheet, PDF (9/22 Pages) Infineon Technologies AG – High Speed CAN-Transceiver with Bus wake-up

TLE6251DS
TLE6251DS. If the dominant signal switches back to recessive level, e.g. failure removed, a
wake-up via CAN bus (recessive to dominant signal detected) is possible.
BUS V_DIFF
(CANH-CANL)
V_CC
D
R
D
STB
(Mode)
V_CC
Normal Mode
(STB = LOW)
RxD
V_CC
t
Standby Mode (STB = HIGH)
t_WU1
t_WU2
t
Figure 5
Go-To Standby Mode during Bus Dominant Condition
t
AET03393.VSD
Wake-up via CAN Message
During standby mode, a dominant CAN message on the bus longer than the filtering time t > t_WU1,
leads to the activation of the wake-up. The wake-up during standby mode is signaled with the
RxD output pin. A dominant signal longer t > t_WU1 on the CAN bus switches the RxD level to
LOW, with a following recessive signal on the CAN bus longer t > t_WU2 the RxD level is switched
to high, see Figure 6.
The µC is able to detect this change at RxD and switch the transceiver into the normal mode.
Data Sheet
9
Rev. 3.1, 2007-08-20