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Help with SDA and SCL using port pins

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v_sriram

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Hello everyone,
My project is in a dire situation after having realised that I forgot to place tracks for the SDA and SCL pins(ATmega128) on my 4-layer board. Is there a possibility of implementing SDA and SCL with the TI TMP-275 serial o/p temperature sensor using normal port pins? Please post any reference(or probably the code). :cry:
 

yes, you can assign any pin as sda or scl and use software bit banging

Regards
Nandhu
 

In order to simulate the open collector nature of sda/scl you will need to bit-bang the *direction* bits, not the *port* bits.
/mike
 

Could you please suggest some material that I could refer for the same.
Thank you
Sriram
 

I suggest u should master the IIC protocol first if the IC used this.The general IO can simulate this protocol.If u need the sample code,mail me:noley@21cn.com.
 

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