Gopel Electronic G CAR 6282, Manual

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CHAPTER 3. TECHNICAL DESCRIPTION GÖPEL electronic GmbH
G_Can_Node_ InternalVBat_Disable
. In this case, the external voltage (UBAT
ext
) must be fed via the
predefined pins on the front connector. With G_Can_Node_InternalVBat_Enable the internal supply is
switched on again.
The battery voltage UBAT of the transceiver slots 13-16 cannot be switched externally.
The 120
Ω
bus terminating resistor of the transceiver can be deactivated by software with the G-API command
G_Can_Node_BusTermination_Disable . With G_Can_Node_BusTermination_Enable the bus termination
resistor is reactivated.
3.5.2 LIN/ K-Line
The G CAR 6282 Multibus Controller supports a total of four LIN/ K-Line interfaces.
Please note that only the high multibus pin ”TRV_Slot_H” of the ODU connector is required for LIN/
KLine.
For LIN the following transceiver is used:
• TJA1020
The following specifications apply to the transceiver:
Table 3.12: Electrical characteristics for LIN
Symbol Parameter Min. Typ. Max. Unit Comment
Transfer rate 19.2 kBit/s
UBAT
int
Internal battery voltage 12 V switchable
UBAT
ext
External battery voltage 12 27 V
R
LIN
Pull up resistance 1 30 k
Ω
switchable for Master (1k)/ Slave (30k)
The LIN interface is generally supplied with an internal 12 V voltage (UBAT
int
). If other voltage levels are
used, the internal voltage of all LIN interfaces can be controlled by software with the G-API command
G_Lin_Node_InternalVBat_Disable
. In this case, the external voltage (UBAT
ext
) must be fed via the
predefined pins on the front connector. With
G_Lin_Node_InternalVBat_Enable
the internal supply is
switched on again.
The battery voltage UBAT of the transceiver slots 13-16 cannot be switched externally.
The 1 k
Ω
pull up resistor corresponds to the LIN Master Bus termination and can be activated by software with
the
G_Lin_PullUpResistor_Enable
. With
G_Lin_PullUpResistor_Disable
slave mode is activated. When
deactivated (slave mode), the internal terminating resistor of the LIN transceiver becomes active (30 k
Ω
).
For K-Line the following transceiver is used:
G CAR 6282 18