TWR-S12G128-KIT Freescale Semiconductor, TWR-S12G128-KIT Datasheet - Page 12

• Manufacturer Part Number: TWR-S12G128-KIT
• Description: TOWER KIT S12G128
• Manufacturer: Freescale Semiconductor

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The LIN interface provides optional features of slew rate control, network supply, and wake up
option. Refer to the MC33661 Reference Manual for detail on PHY functionality. The following
sections detail functionality for LIN option jumpers.
LIN Enable
The LIN PHY is enabled by default. Disable the PHY by connecting the test point, TP3, to
GND.
LIN COM Input
LIN inputs RX and TX are selectable using the COM_EN option header. Refer to Figure 6
above for details on configuring this header.
LIN_PWR Option
The LIN_PWR option jumper connects pin 1 of both LIN connectors to the +V input. In Master
mode, this option may be used to power LIN slave devices. This option requires +12V be
applied at E1/E2 inputs. In Slave mode, this option allows slave device to draw power from the
LIN network. For Slave mode configuration, external power should not be applied to the target
board. LIN_PWR is enabled by installing a shunt from JP3-1 to JP3-2. Refer to Figure 8
below.
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.
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