T-40 User’s Manual
16
6 Interface signal
6.1 Serial interface
The serial interface of the printer is compatible with RS-232 standard, and its interface socket
is D-SUB25 socket.
Pin
Signal
Signal definition
Function
1
FG
—
House ground
2
TXD
Output
Data output
3
RXD
Input
Data input
5
NC
—
Not connected
6
DSR
Input
Data device is ready
7
SG
—
Signal ground
8
－
19
NC
—
Not connected
4,20
DTR
Output
Require to send
21
－
25
NC
—
Not connected
Fig. 6.1-1 Serial interface definition
User can query interface setting status via printing configuration sample. The default settings of
serial interface are as follows:
Baud rate: 115200bps; Data bits: 8; Parity: none; Stop bit: 1; Handshake: DTR/DSR.
6.2 Parallel interface
The parallel interface can work in IEEE 1284 compatible mode or nibble mode. The interface is
36PIN socket.
Interface definition:
Pin No.
Signal source
Signal definition
1
H
nStrobe
2
H
Data 0 (Least Significant Bit)
3
H
Data 1
4
H
Data 2
5
H
Data 3
6
H
Data 4
7
H
Data 5
8
H
Data 6
9
H
Data 7 (Most Significant Bit)
10
P
nAck
11
P
Busy
12
P
Perror
13
P
Select
14
H
nAutoFd
15
Not defined
16
Logic Gnd
17
Chassis Gnd
18
P
Peripheral Logic High
19
Signal Ground (nStrobe)
20
Signal Ground (Data 1)
