What can you do with UART ports in Microcontroller?

Question

In my Microcontroller there exist UART ports. But I have not understood well how they can be used. Can I use them for TTL or RS232 communication? And would it be also possible for me to use them to receive DVP signal from CMOS image sensor like OV7670?

Thank you

Microcontroller UARTs can not do RS232 by themselves, so they need an external RS232 transceiver IC to do RS232. Related: [Difference between UART and RS232?](http://electronics.stackexchange.com/questions/110478/difference-between-uart-and-rs232). — Nick Alexeev, May 23 '15 at 05:57

score 1 · Accepted Answer · edited May 23 '15 at 09:32

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UART is a communication protocol. If micro controller wants to communicate to a specific sensor which supports UART then the micro controller can be interfaced to that sensor using UART protocol.

In your micro controller you have specific Tx(Transmitting) and Rx(Receiving) pins. If you go through your controllers datasheet or pinouts you will get it. OV7670 works with UART interface. Your connection should be like this
OV7670 Tx----Micro controller Rx
OV7670 Rx----Micro controller Tx
OV7670 Gnd---Micro controller Gnd

If you are going to connect the micro controller to PC or any other RS232 devices then you may need to convert TTL logic to RS232 logic. You have many readily available converters for this purposes.

edited May 23 '15 at 09:32

Dan Laks

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answered May 23 '15 at 06:09

Vijay Anand Chandrasekaran

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Thank you. So the difference between TTL and RS232 is just max/min voltage Isn't it? – Nownuri May 23 '15 at 06:23
Not exactly. Like what kind of voltage are you referring to? Can you be precise? – Vijay Anand Chandrasekaran May 23 '15 at 06:26
Hope this helps you http://www.instructables.com/id/How-to-use-OV7670-Camera-Module-with-Arduino/ – Vijay Anand Chandrasekaran May 23 '15 at 07:14

What can you do with UART ports in Microcontroller?

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