Can any microcontroller have more than one set of Tx and Rx for UART?

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pd123

New Member

• Feb 8, 2011

• #1

I am working on a project where I have to connect a GPRS/GSM module and also an interpreter. As far as I know, We need Tx,Rx for UART communication with the GPRS module as well as the Interpreter(as seen in the datasheet). If there is no such microcontroller available then is there any solution?

 

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Pommie

Well-Known Member

Most Helpful Member

• Feb 8, 2011

• #2

There are uCs with dual UARTs but what is an interpreter? You would normally use the uC to interpret the received data.

Mike.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 8, 2011

• #3

It's pretty easy to use both a hardware UART and a software one, so there should be no problem.

 

atferrari

Well-Known Member

Most Helpful Member

• Feb 9, 2011

• #4

There are several

Microchip has several micros with more than one UART built in.

 

Boncuk

New Member

• Feb 9, 2011

• #5

The ATMega1280 has four UARTs.

 

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Diver300

Well-Known Member

Most Helpful Member

• Feb 9, 2011

• #6

I have used a pic18F that had one UART, where two serial ports were needed. I used a software UART for one of the serial ports.

The pic24FJ64GA004 (and similar) have two UARTs and that it what I use now. The UARTs can be allocated to just about any pin.

 

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pd123

New Member

• Feb 10, 2011

• #7

The datasheet of the microcontroller MSC1213Y5 says that it has 2 USARTs. The pins are named TxD0,RxD0 and TxD1,RxD1. I have to interface it with another IC which has pins namely UART_Tx and UART_Rx. Can my microcontroller be interfaced with this IC using TxD0,RxD0?

What is the difference between UART and USART except for one going in frames and the other going in blocks?

 

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pd123

New Member

• Feb 10, 2011

• #8

I am using ELM interpreter for communication with a vehicle.

 

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Diver300

Well-Known Member

Most Helpful Member

• Feb 10, 2011

• #9

pd123 said:

What is the difference between UART and USART except for one going in frames and the other going in blocks?

Click to expand...

The USART can also be used for synchronous communication, like I2C. The UART is limited to asynchronous communication, like RS232 or RS485.

 

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pd123

New Member

• Feb 21, 2011

• #10

I am planning to use AVR micro-controllers, I zeroed on the ATMEGA128 controller, but I couldn't find any difference in the features of the ATMEGA128, ATMEGA1284 and ATMEGA1284P. Does anybody know the difference in these micro-controllers?

Also to address 128Kbytes of Flash memory, what should be the size of the program counter?