Thread: Is MXP UART.RX 5v tolerent
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Unread 23-01-2015, 19:05
JohnGaby JohnGaby is offline
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Re: Is MXP UART.RX 5v tolerent
Quote:
Originally Posted by Joe Ross View Post
Are you sure about that. I cannot find anything in the spec you referenced that addresses this issue (perhaps I am missing it?), only a comment down below. Also there is another comment stating that the UART on the MXP is 3.3v TTL.

The thing that worries me is that it is documented that the RX pin has a 40K pull up resistor to 3.3v, and it indeed seems to be pulled up to 3.3v when I look at it on a scope. What happens then when I try and drive it to 5v with and Arduino?

Thanks.