I want to know if the flash memory in them is user programmable or do I have to send the chip to the factory to be programmed. I have no experience with flash memory so excuse my lack of knowledge.

thanks
Sami

 

Flash memory is user programmable. The kind of memory that is done at the factory is called mask programming. The economics of mask programming are such that you need to order a minimum of 10,000 units to cover the NRE charge. One software bug and the whole lot becomes a pile of chicklets. That is why very few people use this method except very large companies who can afford to take such risks. I've heard tell that the unit cost of a mask programmed part can be driven below $1.00 in sufficiently large quantities. In my business we seldom ever make as many as 1,000 of a single design. One hundred pieces is actually a substantial order for us.