Connector Pin Assignments - Texas Instruments TravelMate 4000M User Reference Manual

Connector Pin Assignments

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