RTE-V852-PC
USER’ S MANUAL (Rev. 1.10)
16
3.20. SERIAL CONNECTORS [BASE BOARD] (JSIO1, JSIO2)
The JSIO1 and JSIO2 connectors are used for the RS-232C interface controlled by the serial
controller (TL16C552A). Regarding the connector shapes, JSIO1 is a 9-pin D-SUB RS-232C
connector like that normally provided on the PC/AT, while JSIO2 is a pin header type connector with a
pitch of 2.54 mm. All signals at both of these connectors are converted to RS-232C level. The pin
arrangements of these connectors are shown below, after which the signal assignments are listed.
For the connection signals when the connectors are connected to the host, the table lists the wiring for
both the D-SUB 9 pins and D-SUB 25 pins on the host side. (Regular cross-cable wiring is used for
these connections.)
The pin arrangement of JSIO2 is identical to that of JSIO1 when a push-fit connector with a ribbon
cable is connected to JSIO2.
1
9
8
7
6
5
4
3
2
JSIO1 Pin Arrangement
1
10
9
8
7
6
5
4
3
2
JSIO2 Pin Arrangement
Connector pin No. on the host side
JSIO1
pin No.
JSIO2
pin No.
Signal
name
Input/output
D-SUB9
D-SUB25
1
1
DCD
Input
2
3
RxD(RD)
Input
3
2
3
5
TxD(SD)
Output
2
3
4
7
DTR(DR)
Output
1, 6
6, 8
5
9
GND
5
7
6
2
DSR(ER)
Input
4
20
7
4
RTS(RS)
Output
8
5
8
6
CTS(CS)
Input
7
4
9
8
RI
Input
--
10
NC
JSIO1/2 Connector Signals
