UART 3.3V or 5.0V?
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- Posts: 7
- Joined: Fri Dec 25, 2009 3:05 am
UART 3.3V or 5.0V?
After discovering documentation i came to the conclusion that UART(CON1 and CON2 on mini2440 board) working levels are +-3.3V. Is it right?
Re: UART 3.3V or 5.0V?
The uart's coming from the S3C2440 are 3.3v
The physicalserial port header on the mini24440 goes thru a level shifter (max232) which is +-12v.
The physicalserial port header on the mini24440 goes thru a level shifter (max232) which is +-12v.
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- Posts: 7
- Joined: Fri Dec 25, 2009 3:05 am
Re: UART 3.3V or 5.0V?
I know that physical port header works through level converter. I want to connect BT-device which works with +-3.3V TTL directly to UART, you confirm my conclusion, thanks a lot.
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