Label Maker User Manual
Section 5: Interface Specifications
LM Basic 408e/412e Operator’s Manual Page 5-13
5.13 IEEE 1284 INTERFACE (CONT’D)
Pin Assignment
With Centronics standards, each signal pin placement is as follows:
However, the IEEE 1284-B type connector is compliant when connecting the IEEE1284 
standard.
5.13 INTERFACE SIGNALS
With Centronics standards, the content of each signal type is as follows. However, each signal 
line used with IEEE1284 standards is compliant with IEEE1284 standards.
Pin no.  Signal Type  Content  Pin no.  Signal Type  Content 
1 HOST CLK  Input  19 SIGNAL GROUND   
2 DATA 1  Input  20 SIGNAL GROUND   
3 DATA 2  Input  21 SIGNAL GROUND   
4 DATA 3  Input  22 SIGNAL GROUND   
5 DATA 4  Input  23 SIGNAL GROUND   
6 DATA 5  Input  24 SIGNAL GROUND   
7 DATA 6  Input  25 SIGNAL GROUND   
8 DATA 7  Input  26 SIGNAL GROUND   
9 DATA 8  Input  27 SIGNAL GROUND   
10 PERIPH CLK  Output  28 SIGNAL GROUND   
11 PERIPH ACK  Output  29 SIGNAL GROUND   
12 nACK REVERSE  Output  30 SIGNAL GROUND   
13 XFLAG  Output  31 NREVERSE REQUEST  Input 
14 HOST ACK  Input  32 nPERIPH REQUEST  Output 
15  33  
16 LOGIC GND    34   
17 CHASSIS GND    35   
18  PERIPHERAL LOGIC HIGH Input  36 1284ACTIVE  Input 
Pin no.  Signal Type  Direction Contents 
1  HOST CLK  Input  A low active pulse is necessary in synchronized 
signals for scanning Data 1 to Data 8. 
2 to 9  DATA 1 to DATA 8  Input  When entering 8 bit parallel Data, Data 1 is the LSB 
(least significant bit) and Data 8 is the MSB (most 
significant bit) 
10  PERIPH CLK  Output  This is the LOW active pulse signal that indicates the 
completion of received data scanning. 
11  PERIPH ACK  Output  HIGH active signal which indicates that the printer 
cannot receive data. 
12  nACK REVERSE  Output  HIGH active signal which indicates that the media has 
run out. 
13  XFLAG  Output  HIGH active signal which indicates that data can be 
received. 
14  HOST ACK  Input  Signal for when using the IEEE1284 standard. 
17  CHASSIS GND    Connects to the Frame Ground 
18 PERIPHERAL 
LOGIC HIGH 
Output  The +5V voltage on the printer side. 
19 to 30  SIGNAL GROUND    Connects to the ground for each signal 
31 nREVERSE 
REQUEST 
Input  LOW active signal that requests printer initialization. 
32 nPERIPH 
REQUEST 
Output  LOW active pulse signal that indicates a printer error. 
36  1284ACTIVE  Input  Signal for when using the IEEE1284 standard. 










