Intermec EasyCoder 301 – Service Manual Ed. 3
49
Chapter 11 CPU Board
Serial Port (RS232)
Protocol
9600 baud, No parity, 8 data bits, 1 stop bit (default).
To change the serial interface settings, use the SETUP command.
Interface Cable
Computer end: Depends on type of host computer.
IBM-XT:DB25 female connector
IBM-PS2: DB25 female connector
IBM-AT:DB9 female connector
Printer end:
DB9 male connector.
Host
EasyCoder 301
Host
Signal DB-9 DB-9
Signal
DB9 DB-25 Signal
1
+5V 150mA
1
1
RXD
2
2
TXD
2
3
RXD
TXD
3
3
RXD
3
2
TXD
DTR
4
4
–
4
20
DTR
GND
5
5
GND
5
7
GND
DSR
6
6
RDY
6
6
DSR
RTS
7
7
CTS
7
4
RTS
CTS
8
8
RTS
8
5
CTS
9
–
9
11.6 Communication
Ports, cont'd.
Parallel Port
Standard
IEEE 1284-I compliant (Centronics)
Interface Cable
Computer end:
Depends on type of host computer.
IBM-PC: DB25 male connector.
Printer end:
36 pin female Centronics connector.
Pin
Function
Transmitter
1
/Strobe
Host
2-9
Data 0-7
Host
10
Ack
Printer
11
Busy
Printer
12
Error
Printer
13
Select
Printer
14
Autofd
Host
15
N/C
16
Signal ground
17
Chassis ground
18
Logic high
Printer
19-30
Signal ground
31
/Init
Host
32
/Fault
Printer
33-35
N/C
36
/Selectin
Host
1
/. Short-circuit protected.
