TLE9250LE datasheet(13/28 Pages) INFINEON

13 / 28 page

Data Sheet

Rev. 1.0

2017-08-09

HS CAN Transceiver

High Speed CAN Transceiver

Changing the mode of operation

6.2

Mode change by the NEN and NRM pins

When the TLE9250 is supplied with the digital voltage VCC the internal logic works and mode change by the

mode selection pins NEN and NRM is possible.

By default the NRM input pin and the NEN input pin are logical “high” due to the internal pull-up current source

to VCC.

Changing the NEN input pin to logical “low” in Power-save mode triggers a mode change to Normal-operating

mode (see Figure 7). To enter Normal-operating mode the NRM input pin has to be logical “high” and the

transmitter supply VCC needs to be available.

Receive-only mode can be entered from Normal-operating mode and Power-save mode by setting the NRM

pin to logical “low”. To enter Receive-only mode the NEN input pin and the NRM input pin has to be logical

“low” and the transmitter supply VCC needs to be available. The device remains in Power-save mode

independently of state of the NRM input pin.

Figure 7

Mode selection by the NEN and NRM pins

NEN

NRM

VCC

Power-down

state

“X”

“off”

Normal-operating

mode

NEN

NRM

VCC

“on”

Receive-only

mode

NEN

NRM

VCC

“on”

Power-save

mode

NEN

NRM

VCC

“X”

“on”

NEN “1”

NRM “X”

NEN “0”

NRM “1”

NEN “1”

NRM “X”

NEN “0”

NRM “0”

NEN “0”

NRM “0”

NEN “0”

NRM “1”

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