Datasheet

EA uniTFT Vorläufig
RS232
RS232 is a standard for a serial interface. Data is transmitted serially in an asynchronous manner. The data is
thus converted into a bit stream and transmitted. No common clock line exists. In other words, every bus sub-
scriber needs to work with the same transmission rate (the so-called “baud rate”). RS232 is a voltage interface.
That means that the data is transmitted via a voltage level. In the PC world and industrial control systems, levels
of +12V or -12V are defined as the standard. Within PCBs or in micro-controllers, it is usual to work with 0V or
VDD (in the case of the EA uniTFT050 3.3 V). To adjust the signal level, there are one or two options in the form
of level shifters. RS232 consists of “hearing” and “speaking” lines which are crossed between the two sub-
scribers.
DATA FORMAT
The format for the data transmission is 8-N-1:
BAUD RATES
The baud rate is preset to 115.200 baud in the delivery state.The command Beispiel siehe S. 97 can change the
baud rates. Alternativly you can set this command also in the file <start.emc>.
Baudrates Error rate in %
9600
+0,04
19200
-0,08
38400
+0,16
57600
-0,08
115200
+0,64
230400
-0,80
460800
+2,08
921600
-3,68
Technische Änderung vorbehalten.
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