I'm wondering if there is a particular range of I2C addresses that are either reserved or recommended for end-user use. I know that <=7 and >=0x78 are not allowed, but I haven't found anything about either mandatory or suggested "band plans" for choosing addresses in the allowed range.
Koshchi 
If you are setting the addresses yourself, then just use whatever addresses you want. I believe that even the reserved addresses are for multi-master mode, so if you are not doing that, you can use those too.
js 
Unless you are using products that have predetermined addresses (is DS1307) then you can use anything you want I guess if you are using AVRs as slave devices.
atomicdog 
The I2C spec tells you exactly which addresses are reserved if you want to avoid them.
The I2C spec tells you exactly which addresses are reserved if you want to avoid them.
Of course I can avoid the factory-assigned addresses of any devices I would use in a particular application, but if there are preferred ranges of addresses more likely to avoid such conflicts I might as well get in the habit of using them. But it's beginning to sound like there are no such preferred address ranges.
Mike
atomicdog I think it varies too much by the manufacture of devices that might be used to know. A good place to start might be to avoid the address range of the 24Cxxx type EEPROM series since their vary common.
