shaocaholica: Why do they call it a lens 'cpu'? Its not computing anything. Its just a rom. Maybe on some models it reports back a focal for a zoom but thats hardly worth calling it a 'cpu'.
Dont be a fool to marketing jibber jabber
Thats not the function of a CPU, a value feedback can be a simplistic as a rheostat that feeds a variable resistance back to the camera. Unless it is a general purpose compute unit that is running some sort of code it is not a CPU, it is at the most complex level an ASIC (a microchip that performs a fixed function without code)