64
Pin no.
Signal name
Direction
Description
1
CD
Input
Carrier detection
2
RD
Input
Receive data
3
TD
Output
Send data
4
DTR
Output
Data terminal ready
5
GND
–
Ground
6
DSR
Input
Data set ready
7
RTS
Output
Send request
8
CTS
Input
Send enabled
9
RI
Input
Ring indication
Pin no.
Signal name
Direction
Description
1
STROBE
Input/output
Strobe
2
DATA0
Input/output
Data0
3
DATA1
Input/output
Data1
4
DATA2
Input/output
Data2
5
DATA3
Input/output
Data3
6
DATA4
Input/output
Data4
7
DATA5
Input/output
Data5
8
DATA6
Input/output
Data6
9
DATA7
Input/output
Data7
10
ACK
Input
Acknowledge
11
BUSY
Input
Busy
12
PE
Input
Out of paper
13
SELECT
Input
Select
14
AUTOFD
Output
Automatic feed
15
ERROR
Input
Error
16
INIT
Output
Initialization
17
SLCTIN
Output
Select
18 to 25
GND
–
Ground
●
Serial connector
13
1
25
14
1
5
6
9
●
Parallel connector
