Connector pin assignments, Appendix g connector pin assignments, Gconnector pin assignments – Texas Instruments 4000M User Manual
Page 264: Rs-232c connector, Parallel connector
G
Connector Pin Assignments
RS-232C Connector
Nine-Pin RS-232C Serial Connector (Female IBM-AT)
Pin No.
Signal Name
Abbreviation
Direction
1
Carrier detect
CD
Input
2
Receive data
RD
Input
3
Transmit data
TD
Output
4
Data terminal ready
DTR
Output
5
Signal ground
SG
6
Data set ready
DSR
Input
7
Request to send
RTS
Output
8
Clear to send
CTS
Input
9
Ring indicator
RI
Input
Parallel Connector
25-Pin Parallel Printer Connector
Pin No.
Signal Name
Abbreviation
Direction
1
Strobe
STROBE–
Output
2
Data 0
DATA0
Output
3
Data 1
DATA1
Output
4
Data 2
DATA2
Output
5
Data 3
DATA3
Output
6
Data 4
DATA4
Output
7
Data 5
DATA5
Output
8
Data 6
DATA6
Output
9
Data 7
DATA7
Output
10
Acknowledge*
ACK–
Input
11
Busy
BUSY
Input
12
Paper Out
PE
Input
13
Select
SLCT
Input
14
Auto Linefeed*
AUTO FEED–
Output
15
Error*
PERROR–
Input
16
Initialize printer*
INIT–
Output
17
Select input*
SLCT IN–
Output
18-25
Ground
GND
*Note: Active Low
1
6
9
5
Connector Pin Assignments G-1