Lin / Uart Connectors (X2 - X5) - Fujitsu MB91460 SERIES User Manual

3.4 LIN / UART Connectors (X2 – X5)
There are four identical circuit blocks for LIN or RS232 connections. Each of the four D-Sub
connectors can be configured as LIN or RS232 interface. DTS or RTS can be selected as
reset source, and RTS and CTS can be connected by a jumper, since some terminals and
Flash programming tools need this connection. Pin 1 (PIN Vs) of X2-X5 can be connected to
the voltage input (VBat) of the board by jumpers in order to supply the LIN bus. When using
this feature, pay attention to the input voltage of the board, since there is only a protection
diode between Vin and Vs.
LIN-UART 4:
Jumper
JP91
(RXD)
JP92
(TXD)
JP93
(LIN enable)
JP95
(LIN master)
JP96
(RS232/LIN)
JP97
(DTR/RTS)
JP98
(RTS-CTS)
JP99
(LIN VBbat)
By default, UART4 is connected to X4 and configured as RS232 interface.
© Fujitsu Microelectronics Europe GmbH
SK-91467R-176PMC User Guide
Chapter 3 Jumpers and Switches
Setting Description
1-2 SIN4 is connected to RS232 transceiver
2-3 SIN4 is connected to LIN transceiver
1-2 SOT4 is connected to RS232 transceiver
2-3 SOT4 is connected to LIN transceiver
Closed LIN transceiver for X4 is enabled
Open LIN transceiver for X4 is disabled
Closed LIN-UART 4 is LIN Master
Open LIN-UART 4 is LIN Slave
1-2 X4 Pin2 is connected to RS232 transceiver (T1out)
2-3 X4 Pin2 is connected to LIN transceiver (BUS)
1-2 DTR signal (Pin 6 of X4) is used as reset source
2-3 RTS signal (Pin 7 of X4) is used as reset source
Closed RTS and CTS of X4 are connected
Open RTS and CTS of X4 are not connected
Closed Pin 1 (LIN Vs) of X4 is connected to Vin
Open Pin 1 (LIN Vs) of X4 is not connected to Vin
Table 3-8: UART 4 Settings
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