Extension modules • RS232 module •
With this module you can connect the UART interface of the microcontroller to a RS232 (V.24) interface and in this way you can i.e. realize the data transfer between a PC and a microcontroller through the serial interface.
To get into this area easier exaple programs for the microcontroller as well as the PC are available. In this example a text gets transfered from the microcontroller to the PC. The PC will then display the text. With the example program you can transfer data from the PC to the microcontroller. The microcontroller will give these data out on a port.
The PC programm has been written in Visual Basic. The sourcecode as well as a compiled version is available.
Data
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Suitable for Experimenting BoardI and II
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Attachable to extension portPort 0, 1 and 3
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Einstellungen am DIP-SchalterNo special adjustments necessary. XTAL 1 and XTAL 2 should be "ON" so the MC gets a tact signal.
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Power consumption~ 15 mA
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Circuit board / Layout
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LimitationsNone. Please note that the opening at the side of the connector is on this module not pointed to the edge of the board. This makes a better running of lines possible...
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Developed byJan Cordes
Schematic
Click on the schematic to open it in full size.
Schematic and Layout
For the schematic and layout plans you need the highly recommended schematic and layout editor EAGLE. A free english version can be downloaded at http://www.cadsoft.de/freeware.htm.
RS232 module Schematic and layout
File size: around 10 KByte
Further downloads
Sample program (Microcontroller)
File size: around 3 KByte
Sample program (PC)
File size: around 7 KByte
Sample program (PC, source code)
File size: around 3 KByte
