RTC chip DS1307 issue

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aliyesami

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can't seem to find the I2C address for DS1307 chip . for PCF8574N data sheet clearly tells on how to set this address but nothing like that for DS1307 , I know this is a very popular chip so can someone guide me on this issue?

thanks
 

Hi,

Just type DS1307 into the "search box" above, you will find loads of examples of how to use that chip.
 

Thanks Brian !

that explained it , they call the device address as "slave address". so 0x68 is the device address.
 

hello,
aliyesami said:
Thanks Brian !that explained it , they call the device address as "slave address". so 0x68 is the device address.
Click to expand...
yes,it is the device adress on 7 bits,right justified,
but you have to use adresse x 2+0 for write data ...0xD0 or adressex2 +1 for read data....0xD1
Click to expand...
 
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No, not 0x68.
As I stated and verified by Paulfjujo, The slave address byte contains the 7-bit DS1307 address, which is 1101000, followed by the direction bit (R/W), which for a write is 0.
So the address is 11010000 = 0xD0 when writing to it and 11010001 = 0xD1 when reading from it.

Brian.
 

ok thanks for your input ,my chip will be arriving soon, cant wait to program it.
 

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