Fujitsu SK-91460T-144PMC-GPIO Manuale d'uso - Pagina 18
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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 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
JP21
(RXD)
JP25
(TXD)
JP27
(RS232/LIN)
JP20
(RTS-CTS)
JP89
(DTR/RTS)
JP33
(LIN enable)
JP39
(LIN master)
JP30
(LIN Vbat)
By default, UART4 is connected to X2 and configured as RS232 interface.
For Flash programming, UART4 has to be used (RS232).
FMEMCU-UG-910074-11
SK-91460T-144PMC-GPIO 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
1-2
X2 Pin2 is connected to RS232 transceiver (T1out)
2-3
X2 Pin2 is connected to LIN transceiver (BUS)
Closed
RTS and CTS of X2 are connected
Open
RTS and CTS of X2 are not connected
1-2
DTR signal (Pin 6 of X2) is used as reset source
2-3
RTS signal (Pin 7 of X2) is used as reset source
Closed
LIN transceiver for X2 is enabled
Open
LIN transceiver for X2 is disabled
Closed
LIN-UART 4 is LIN Master
Open
LIN-UART 4 is LIN Slave
Closed
Pin 1 (LIN Vs) of X2 is connected to Vin
Open
Pin 1 (LIN Vs) of X2 is not connected to Vin
Table 3-6: UART 4 Settings
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