Jetter JC-120MC, User Manual

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Jetter AG 465
JC-120MC Programming
Functioning principle
The OS of the JC-120MC provides for the user-programmable serial interface
a receiving buffer and a transmit buffer. They can be used to adjust the
transfer rate between application program and serial interface.
The following illustration shows the block diagram of the user-programmable
serial interface:
Driver
Driver
Receiver
Transmitter
Receive-FIFO
Transmit-FIFO
R
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ei
ve
R
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is
te
r
Tr
an
sm
it
R
eg
is
te
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S
ta
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an
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C
on
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R
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The user-programmable serial interface consists of the following elements:
Number Part Function
1 Interface driver Converts signals of different interface standards
(RS-232, RS-422, RS-485) into internal signal
levels
2
Addressee Performs serial/parallel conversion
3 Receiving buffer Buffer for received characters
4 Receive register Read access to this register reads the received
characters in the receive buffer (3).
5 Interface driver Converts internal signal levels into signals of
different interface standards (RS-232, RS-422,
RS-485)
6
Transmitter Performs parallel/serial conversion
7
Transmit buffer Buffer for characters to be sent
8 Transmit register Write access to this register causes the
characters to be entered into the transmit buffer
(7) and to be sent by the transmitter (6).
Introduction
Block diagram
Elements of the interface