[En-Nut-Discussion] UART0 receive problem

Prasad.Nagapati at infineon.com Prasad.Nagapati at infineon.com
Wed Jun 10 09:59:23 CEST 2009

Hi All,

I need a help, basically I want to tap the I/O  line between a smart
card and smart card reader.

For this I am using JNUT board 1.3H, where I want to connect the UART0
Rx line to the above mentioned I/O line.

What is the extra circuitry I need to Tap this I/O line.

Is it sufficient to connect the I/O line from smart card via a pull up
resistor to the Rx pin of UART0? Or there is a level shifter is

Smart card also works in the +5V,

Please help me I am confused in this.


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