Civil Engineering Reference
In-Depth Information
Fig. 2.59
Block diagram and pinning TLE6251-2G
2.6.2.4
Mode Pins: INH and RM
The INH pin controls the mode of the transceiver. In normal mode, the transceiver
transmits and receives data. In standby mode, the transceiver current consumption
is reduced to a minimum and the transmitter and receiver are blocked. The pin RM
blocks the transmitter if the CAN controller is not working correctly or TxD is
shorted to ground. The receiver works correctly in this mode.
2.6.2.5
V33V-I/O Supply Voltage
In some applications, different supply voltages are used for the microcontroller (for
example, 3.3 V) and the transceiver (5 V).To allow this separate voltages, the inter-
face pins are supplied from the microcontroller. An internal level shifter shifts the
levels from the V33 domain into the 5 V transceiver domain. In case of a missing
V33 voltage, the transmitter is blocked.
2.6.2.6
TLE 7250G and TLE 7250GVIO
The TLE 6250G and TLE 6250GV33 have now followers called TLE 7250G and
TLE 7250GVIO with higher ESD robustness and a TxD time-out function. In case
of a dominant signal longer than 300 µs the transmitter will be switched off to re-
lease the bus. After high on TxD the latch will be released.
