[51] Should i implement I2C protocol for RTC always.

[arjun manoharan]

Hi,

I am a newbie to microcontrollers.I want to use a RTC(ds1307) with my AT89s52,so my question is should i implement I2C bus protocol.

I wish to connect the same in port 2.I don't and will not have any other device connected in that port.Please help me out.


Thank You

 

[milan.rajik]

You have to use Software I2C.

 

[paulfjujo]

hello,

if you won't use I2C, you can use a RTC DS1302 in software SPI mode..instead.
or milan.rajik solution to use any pin to drive SCL and SDA.
but SDA pin must be open collector type..

 

[Gorgon]

After the I2C standard, both SCL and SDA must be open collector output types.

 

[arjun manoharan]

Thank u for all the reply .

I saw the code for I2C it is very big for me because i don't have any experience with embedded system and this is my first task.

Can i use an I2C to UART convertor with my at89s52?
I so then should i create a software module for I2C protocol.

The next question is->

Can i have 2 devices using SPI protocol running at the same time but however using different pins.

Thank You