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'[SX] FTDI and SX Questions'
2005\12\13@185822 by wppangn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, wppang wrote:

Hi,
I have a few questions on FTDI FT232BM with SX20SS.  I hope somebody can help.

1.  What is the voltage level on the FTDI Tx and Rx pins.  Is it TTL 5V or 12v?
2.  Does the Tx and RX pins use inverted logic like PCs?
3.  If my application sets the virtual comm port baud rate to 4800, does it mean that the FTDI chip will also talk to the SX at 4800bps?
4.  Why when my SX sends a byte to the FTDI chip, it echoes back that byte to the SX?  How to switch off this echo?
When this happens my PC Terminal receives some garbage byte...  I don't know what's wrong...
5.  How to know what baud rate is the FTDI chip currently using?

Thanks a million !

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2005\12\28@120703 by geekythingn/a

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, geekything wrote:

The levels are TTL. You might gain some more insight if you go look at the Serial Inkjet Kit documentation -- it has the driver board schematic which interfaces an SX28SS with a FT232.

-marc
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