Serial Port Interface - Renesas M3A-HS37 User Manual

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2.4 Serial Port Interface

SH7137 SCI0 or SCI 1 pins can be connected to the serial port connector on the M3A-HS37 (default: PE1 pin and PE2 pin are
connected to the serial port connector, J3). The serial port switch jumpers (JP7, JP8, JP9, and JP10) switch the SCI channels
connected to a serial port connector.
Figure 2.4.1 shows the serial port block diagram on the M3A-HS37, and Table 2.4.1 lists the jumper connections.
SH7137
PA3/RXD1/A3/IRQ1
PA4/TXD1/A4/IRQ2
PE1/TIOC0B/RXD0
PE2/TIOC0C/TXD0
SCI0
Rev.1.00 Oct 09, 2008
REJ11J0021-0100
CPU-VCC：3.3 V/ 5 V
CPU-VCC
Figure 2.4.1 Serial Port Block Diagram
Table 2.4.1 Jumper Connections
SCI1 SRAM
Y N Y
N Y N
Note: Y = yes, N = no
RS-232C
driver
CPU-VCC
4.7 K
JP8
1
2
3
CPU-VCC
4.7 K
JP7
1
2
3
CPU-VCC
JP10
1
2
3
JP9 A3
1
A4
2
3
JP7 JP8 JP9
2-3 2-3 2-3
1-2 1-2 1-2
Functional Specifications
2.4 Serial Port Interface
Serial port
CPU-VCC
connector
1
NC
DCD
2
RxD
3
TxD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
NC RI
SRAM
(M5M5256DFP-70GI)
JP10
2-3
1-2
2-6