Data Sheet

8

Rev. 1.1, 2014-04-23

TLE7250GVIO

Functional Description

4.2

Modes of Operation

Two different modes of operation are available on the TLE7250GVIO. Each mode has specific characteristics in

terms of quiescent current or data transmission. The digital input pin NEN is used for mode selection. Figure 4

illustrates the different mode changes depending on the status of the NEN pin. After supplying

V

HS CAN transceiver, the TLE7250GVIO starts in stand-by mode. The internal pull-up resistor at the NEN pin sets

the TLE7250GVIO to stand-by mode by default. If the microcontroller is up and running, the TLE7250GVIO can

switch to any mode of operation within the time period for mode change

t

Figure 4

Modes of operation

The TLE7250GVIO has 2 major modes of operation:

•

Stand-by mode

•

Normal-operating mode

Table 2

Modes of Operation

Mode

NEN

Bus Bias

Comments

Normal-operating

mode

“low”

V

The transmitter is active.

The receiver is active.

Stand-by

“high”

GND

The transmitter is disabled.

The receiver is disabled.

V

“low”

or

“high”

floating

The transmitter is disabled.

The receiver is disabled.

undervoltage

power-down

start–up

NEN = 0

normal-operating

mode

NEN = 1

stand-by mode

NEN = 0

NEN = 1