Appendix D

Connector Pinouts

I/O Ports

RS-232C Serial port

(9-pin subminiature “D” connector):

Pin #

I/O Type:

 

Signal Name:

 

 

 

 

 

1

Input

Carrier Detect (CD)

 

2

Input

Receive

Data

(RD)

 

3

output

Transmit

Data

(TxD)

 

4

output

Data Terminal Ready (DTR)

 

5

Ground

Singal Ground (GND)

 

6

Input

Data Set Ready (DSR)

 

7

Output

Request to Send (RTS)

 

8

Input

Clear to Send (CTS)

 

9

Input

Ring lndicator (RI)

 

 

 

 

 

 

 

Note

All signals conform to EIA Standard RS-232C.

Centronics-compatible parallel printer port

(25-pin subminiature “D” connector):

Pin #

I/O Type:

Signal Name:

 

 

 

1

Input

-Strobe

2

output

Data Bit 0

3

output

Data Bit 1

4

output

Data Bit 2

5

output

Data Bit 3

6

output

Data Bit 4

7

output

Data Bit 5

8

output

Data Bit 6

 

 

 

Connector Pinouts D-l