Serial Port Interface - Renesas M3A-HS25 User Manual

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2.3 Serial Port Interface

The SH7125 included in the M3A-HS25 contains a UART module. In the M3A-HS25, the pins of SCI channel 0 or
SCI channel 1 can be connected to J2 (Serial Port connector). The pins of SCI channel 1 (RXD1(PA3) pin and TXD 1
(PA4)pin) are also connected to H-UDI connector, and extension connector (J5, J7). Switch the setting of the JP3 and
JP4 according to the connector used.
Figure2.3.1 shows the block diagram of serial port interface in the M3A-HS25.
SH7125
RXD0(PE1)
RXD1(PA3)
TXD0(PE2)
TXD1(PA4)
Rev.1.0 July 21, 2006
REJ10J0952-0100
JP4
1
2
3
JP3
1
2
3
Figure2.3.1 Block Diagram of Serial Port Interface
RS-232C
driver
1
NC
2
3
4
5
GND
6
7
8
9
NC
H-UDI
connector(J1）
Extension
connector（J5）
Extension
connector（J7）
Functional Overview
2.3 Serial Port Interface
Serial Port
connector (J2)
DCD
RxD
TxD
DTR
GND
DSR
RTS
CTS
RI
2-4