I searched and I could not find an answer.
I’m trying to interface Arduino directly to the Lpc2148 via rs232 but I don’t know if I can connect the pins directly (meaning not using a level shifter).
My ardunio is decimalanove (5v) so I don’t know if that will fry my LCP2148 when connected both UART pins.
Or do I need an arduino 3.3v to be safe?
Sorry for the basic question.
Thx
Pic_micro
Hi,
To which board is attached your LPC2148 ?
What is your Adruino board??
Generally connecting a uC to RS232 you will need TTL level converter.
cheers
There was a [very similar thread on the yahoo LPC2000 group lately.
Basically the answer is that the RXD0 and RXD1 lines are both specified as 5V tolerant in the 2148 data sheet, so you should be ok.
I didn’t test this myself. (But I did doublecheck the datasheet.)](http://tech.groups.yahoo.com/group/lpc2000/message/44556?var=1&l=1)