User manual

Starter Kit for V850E2/FG4-L User Manual
2.4.4 Serial Communications Interfaces
2.4.4.1 RS232 and LIN
One RS232 transceiver, IC20, is supplied to provide a serial interface. The transceiver is
connected to the microcontroller’s UART interface (URTE10).
One Local Interconnect Network transceiver, IC21, is supplied to provide a LIN interface. The
transceiver is connected to the microcontroller’s LIN capable UART interface (URTE11).
The serial interfaces are connected to the DB9 connector CN12 via jumper CN8.
Caution: The DB9 connector CN12 is shared between the board’s RS232 and LIN interface.
Ensure that each interface is configured for the operation of only one, RS232 or
LIN, using jumper CN8.
Transceiver UART instance CN8 Setting Device signal
1 – 2 URTE10TX
IC20
(RS232)
URTE10
3 – 4 URTE10RX
5 – 6 Ground
7 – 8 VBAT (12V DC)
9 – 10 URTE11
IC21
(LIN)
URTE11
11- 12 Ground
- - 13 - 16 Not used
Table 12. CN8 - Serial Communications Interfaces Signals
In order to operate the LIN interface, a 12V supply (VBAT) from external is required. This can be
achieved by connecting 12V DC to CN13 Pin1.
Connector Position Description
1 External 12V supply CN13
2 Ground
Table 13. CN13 – External 12V supply LIN
Caution: Ensure to NOT connect 12V DC to CN18 pin 1. This would create an overvoltage
condition for all electrical devices on the Starter Kit and will lead to irrecoverable
damage!
Connector Position Description
1 VDD Test point CN18
2 Ground
Table 14. CN18 – Starter kit supply test points
R20UT0939ED0100 Page 13
Mar 8, 2012