topic Re: Problem with MC9S08DZ60 IIC with EEPROM in 8-bit Microcontrollers

Problem with MC9S08DZ60 IIC with EEPROM

harisatuluri — Fri, 28 Jun 2013 12:36:03 GMT

I am trying to write and read data to an EEPROM using IIC in MC9S08DZ60. The problem is i am using while i am debugging the code step by step i can see the written and read Data is same. But when i use it and run using any application it is reading some garbage values. can any one clear me this problem and please explain me why this type of problem arises. I am using AT24C32A as an EEPROM. thanks in advance for your replies.

Re: Problem with MC9S08DZ60 IIC with EEPROM

weapon — Tue, 02 Jul 2013 02:29:58 GMT

Hi Satuluri, did you try to slow down the bitrate? and how about the waveform on the pins? is there any noise? we have to make sure it's hardware issue or a software issue firstly.

Re: Problem with MC9S08DZ60 IIC with EEPROM

harisatuluri — Tue, 02 Jul 2013 04:30:32 GMT

Hi Weiping,

Thanks for your reply, now the problem is solved, mistake is mine, while i am using EEPROM, the datasheet of eeprom states that we need to give some delay after every write cycle. but the delay i am generating is less when compared to delay given in datasheet later i increased the delay as per requirements and got out of the problem.

Re: Problem with MC9S08DZ60 IIC with EEPROM

weapon — Tue, 02 Jul 2013 09:48:44 GMT

Great, that make me recall that EEPROM need some time to write the data into its memory. :smileylaugh: