TWR-S12G128-KIT Freescale Semiconductor, TWR-S12G128-KIT Datasheet - Page 11

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

U S E R
COM Connectcor
A 2x5, 0.1”, standard “Berg” pin-header provides external connections for the SCI port. Figure
5 below shows the COM1 pin-out.
Figure 5: COM1 Connector
COM_EN
The COM_EN option header connects the MCU SCI port to either the SCI PHY or the LIN
PHY. Figure 6 below shows the option jumper configuration for the COM_EN option header.
Figure 6: COM_EN Option Header
LIN Port
The TWR-S12G128 applies the MC33661 LIN bus physical layer device (transceiver) to
support LIN communications. The PHY may be configured as a Master or Slave node on the
LIN bus. LIN connectors J9 & J10 are configured in parallel to support pass-thru signaling.
Figure 7 shows the LIN block diagram.
Figure 7: LIN Block Diagram
MC9S12G128
G U I D E
2
1
COM_EN
2
1
COM_EN
RXD0
TXD0
4
3
4
3
GND
RXD
TXD
2, 7
1, 2
6
5
6
5
Connects target MCU SCI port to LIN PHY to enable LIN bus
communications
Connects target MCU SCI port to RS-232 PHY to enable serial
communications
1
3
5
7
9
10
2
4
6
8
1, 7
CTS
RTS
TP2
NC
COM_EN
(partial)
(partial)
MSTR
JP3
11
MC33661
LIN PHY
J6 / J7
LIN_PWR
(partial)
JP3
CT6