;) D1 and R1 is simple 5V/3.3V level translator..
when RO is Low (RO is switched internaly with tranzistor to ground) 3.3V
from R1 is Grounded and RXD is Low
when RO is High, 5V from IC is blocked by diode and RXD side is 3.3V
High from R1
------------------------------------------------------------------------
*From:* ??
*Sent:* Saturday, May 03, 2014 7:28AM
*To:* ??
*Subject:* Re: [beagleboard] RS485 without direction control
You will never read anything from this chip. What's the point?
03 Май 2014 г. 1:12 пользователь "arsi" <[email protected]
<mailto:[email protected]>> написал:
Hello,
Here is my solution for RS485, without direction control...
MAX13487EESA - AutoDirection RS485 IC
100% functional and simple ;)
RS485 circuit
Arsi
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