TLE8250GVIO

Functional Description

Data Sheet

9

Rev. 1.0, 2010-09-03

4.3

Normal Operation Mode

In Normal Operation mode the HS CAN transceiver TLE8250GVIO sends the serial data stream on the TxD pin

to the CAN bus while at the same time the data available on the CAN bus are monitored to the RxD pin. In Normal

Operation mode all functions of the TLE8250GVIO are active:

•

The output driver stage is active and drives data from the TxD to the CAN bus.

•

The receiver unit is active and provides the data from the CAN bus to the RxD pin.

•

The bus basing is set to

V

•

The under-voltage monitoring on the power supply

V

To enter the Normal Operation mode set the pin NEN to logical “Low” (see Table 2 or Figure 4). The NEN pin has

an internal pull-up resistors to the power-supply

V

4.4

Stand-By Mode

Stand-By mode is an idle mode of the TLE8250GVIO with optimized power consumption. In Stand-By mode the

TLE8250GVIO can not send or receive any data. The output driver stage and the normal receiver unit are disabled.

Both CAN bus pins, CANH and CANL are floating.

•

The output driver stage is disabled.

•

The receiver unit is disabled.

•

The bus basing is floating.

•

The under-voltage monitoring on the power supply

V

To enter the Stand-By mode set the pin NEN to logical “High” (see Table 2 or Figure 4). The NEN pin has an

internal pull-up resistor to the power-supply

V

NEN pin needs to get connected to GND.

4.5

Power Down

Power Down mode means the TLE8250GVIO is not supplied. In Power Down the differential input resistors of the

receiver stage are switched off. The CANH and CANL bus interface of the TLE8250GVIO acts as an high

impedance input with a very small leakage current. The high ohmic input doesn’t influence the “Recessive” level

of the CAN network and allows an optimized EME performance of the whole CAN network.