Renesas M3A-HS64, User Manual

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M3A-HS64 Functions
2.5 RS-232C Interface
Rev. 1.00 Apr 30, 2009
2-22
REJ11J0034-0100
2
2.5 RS-232C Interface
The SH7264 includes a serial communication interface with FIFO (SCIF). D-sub 9-pin connector on the M3A-HS64 is connected to
the SH7264 SCIF channel 0 pin via an RS-232C driver IC.
The SH7264 SCIF channel 0 pin is also used as the channel 0 pin of the Controller Area Network (RCAN-TL1).
The following figure shows the RS-232C interface block diagram. The table below lists the jumpers setting (JP4, and JP5).
SH7264 RS-232C driver
SHDN#
PJ1/CRx0/IERxD/ RxD0
TIN
ROUT
PJ0/CTx0/IETxD/ TxD0
3.3 V
3.3 V
RES#
3.3 V
RIN
TOUT
RXD
DTR#
DSR#
RTS#
CTS#
D-Sub 9-pin
RS-232C connector
JP5
JP4
Expansion connector
TXD
2
3
1
3
2
1
Note: Pin names in red indicate the function used.
Figure 2.5.1 RS-232C Interface Block Diagram
Table 2.5.1 Jumpers Setting (JP4, and JP5)
Number
1-2 2-3
JP4
Selects the TxD0 (SCIF) pin - default Selects the CTx0 (RCAN-TL1) /IETxD (IEB) pins
JP5
Selects the RxD0 (SCIF) pin - default Selects the CRx0 (RCAN-TL1) /IERxD (IEB) pins