Data Sheet

13

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

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

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

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

independently of state of the NRM input pin.

Figure 7

Mode selection by the NEN and NRM pins

NEN

NRM

Power-down

state

“X”

“X”

“off”

Normal-operating

mode

NEN

NRM

0

1

“on”

Receive-only

mode

NEN

NRM

0

0

“on”

Power-save

mode

NEN

NRM

1

“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”