Bixolon SRP-350 User Manual

 

4-3-4 I/F PBA Detect Block Diagram 
 
When the printer is ON, the printer checks what kind of the I/F PBA is installed. After detection, the CPU 
specify the I/O port properly. The following is the method of I/F PBA detection. 
The I/F PBA has the three return Signal (MD0~2). 
The CPU recognize the I/F PBA by the value of the three return signal. 
 

I/F PBA 

MD0 

MD1 

MD2 

RS-232C L 

L 

H 

IEEE1284 

H 

H  

H  

USB2.0 H 

L 

H 

ETHERNET L 

H 

L 

No Connection 

L 

L 

L 

 
4-3-5 RS-232C Communication Block Diagram 
 
The CPU is used for serial communication. And also RS-232C Driver (MAX232), is used to serial 
communication. Show following block diagram. 

   

[Figure 4-8 RS-232C Communication Block Diagram] 

 

 

[Figure 4-9 RS-232C Communication Waveform]