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Functional Overview
2.4 Serial Port Interface
Rev.1.04
2008.7.10
2-7
REJ10J1564-0104
2
SH7285
PE4/RXD3
PE5/TXD3
DCD
RxD
TxD
DTR
GND
DSR
CTS
RI
1
2
3
4
5
6
7
8
9
NC
GND
NC
Serial port
connector
RS-232C
driver
1
2
3
JP
JP
PA0/RXD0
1
2
3
PA1/TXD0
H-UDI connector
Extension connector
PE4/RXD3
PE5/TXD3
PA0/RXD0/CS0/TDI
PA1/TXD0/CS1/TDO
2.4 Serial Port Interface
SCI channel 0 or SCI channel 3 of SH7285 can be connected with the serial port connector in the M3A-HS85 (SCI
channel 3 is connected to serial port connector (J3) in initial setting.). SCI channel to connect to a serial port
connector is switched by the serial port switch jumper (JP7 and JP8).
SCI channel 0 of SH7285 is connected to an H-UDI connector (14-pin and 36-pin). When SCI channel 0 of SH7285
is used as a serial port connector, note that it should not be double-used on the other connectors.
Figure 2.4.1 shows the block diagram of serial port interface in the M3A-HS85.
Figure 2.4.1 Block Diagram of Serial Port Interface