BIXOLON SRP-F310/312 service manual 4 I/F PBA Detect Block Diagram, PBA MD0, MD1 MD2

SRP-F310/312

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
RS-232C	L
IEEE1284	H
No Connection	L

4-3-5 RS-232C Communication Block Diagram

MD1

H

L

L

MD2

L

L

L

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]

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