Interface Signal; Serial Interface; Parallel Interface - SNBC BTP-R681 User Manual

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
1
2
3
5
6
7
8－19
4, 20
21－25
User can query interface setting status via printing configuration sample. The default settings of
serial interface are as follows:
Baud rate: 9600bps; 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.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Signal Signal definition
FG
TXD
RXD
NC
DSR
SG
NC
DTR
NC
Figure 6.1-1 Serial interface definition
Signal source
H
H
H
H
H
H
H
H
H
P
P
P
P
H
P
—
Output
Input
—
Input
—
—
Output
—
Signal definition
nStrobe
Data 0 (Least Significant Bit)
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7 (Most Significant Bit)
nAck
Busy
Perror
Select
nAutoFd
Not defined
Logic Gnd
Chassis Gnd
Peripheral Logic High
Signal Ground (nStrobe)
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BTP-R681 User's Manual
Function
House ground
Data output
Data input
Not connected
Data device is ready
Signal ground
Not connected
Require to send
Not connected