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TPMC310 User Manual Issue 1.1.5
Page 19 of 22
6 Configuration Hints
6.1 I/O Line Configuration
The I/O line configuration is configured by on board solder pads (there is no jumper solution because
the TPMC310 is considered to be used in a vibration-sensitive environment).
Possible line configuration options for each of the two I/O channels (CAN CH1, CAN CH2) are:
•
On board Termination Mode : on / off
•
Bus Mode : bus_end / pass_through
The on board termination option for a CAN I/O channel node input (see P14 I/O pin assignment) is a
120 ohm split termination network.
For the bus_end option, the I/O lines are NOT
passed through from the node input pins to the node
output pins of the P14 I/O connector. The node input pins must be used to connect the CAN bus lines
(see P14 I/O pin assignment).
For the pass_through option, the I/O lines are passed through from the node input pins to the node
output pins of the P14 I/O connector (see P14 I/O pin assignment).
Termination Mode
Bus Mode
On board
Termination On
On board
Termination Off
Bus_End
Pass_Through
CAN CH1
R42, R43 Closed
R42, R43 Open
R35, R45 Open
R35, R45 Closed
CAN CH2
R37, R38 Closed
R37, R38 Open
R33, R40 Open
R33, R40 Closed
Table 6-1 : I/O Line Configuration
Termination Mode
Bus Mode
CAN CH1
On
Bus_End
CAN CH2
On
Bus_End
Table 6-2 : Factory Default I/O Line Configuration