T W R - 9 S 1 2 G 1 2 8
J A N U A R Y 4 , 2 0 1 1
U S E R G U I D E
12
CAUTION:
If the target board draws power from the LIN bus in Slave mode, do
not apply external power at E1/E2 inputs. Damage to the board may
result.
NOTE:
If the target board powers the LIN bus in Master mode, +12V must be
applied externally at E1/E2 inputs.
MSTR Option
The MSTR option jumper allows the LIN transceiver to be configured for Master mode
functionality. Master mode may also be set using the INH pin on the PHY. Refer to the
MC33661 device datasheet for details on use and configuration. Refer to Figure 8 below.
Figure 8: JP3 Option Header
● ● JP3
Connects LIN bus to +V input (default)
● ● LIN_PWR
Enables LIN Master mode functionality (default)
2 1
NOTE:
LIN PHY may also be configured as a Master Node using the INH pin. Refer to the LIN
PHY data sheet for details.
LIN-J1 Connector
The TWR-S12G128 supports two, 2 x 2 Molex connectors to interface to the LIN bus. Figure 9
below details the pin-out of the LIN bus connector.
Figure 9: LIN Connector
LIN Signal
4
3
+V
WAKE
2
1
GND
Front View
– Looking into Connector
NOTE:
LIN Port Connector
– Molex 39-29-1048
Mates with; Housing
– Molex 39-01-2040, Pin – Molex 39-00-0036
