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Hi dazheng,
Need to know ... what is EEPROM used in MCU for ?. I know EEPROM stand for Electrical Erasable Programming ROM but I need to know what's the purpose or where it going to be used in MCU?
I ask this because some of MCU dont have EEPROM ( EEPROM = 0 byte) ie 80NC535 & 80NC321 and the best thing about this MCU (without EEPROM) that's its cheaper than MCU with EEPROM. If it just minor used and can solve it in other method (and not effect my project) , I will use it as I need to lower the cost as much as possible.
Any instruction (ie in proton) that must be used on MCU with EEPROM ?
More explanation greatly appreciated.
Thanks
zuisti
"what is EEPROM used in MCU for ?"
You can use it for whatever purpose you wish!
"I know EEPROM stand for Electrical Erasable Programming ROM"
Not quite - it's "Electrically Erasable Programmable ROM"
Also, the term "EEPROM" is often used specifically of devices intended for Data storage - as opposed to Code storage. Thus, "EEPROM" is often taken to imply a device where it's easy to modify individual bytes, or small groups of bytes - as opposed to devices designed for Code storage, where you usually have to erase the entire device, or large sections of it...
"MCU (without EEPROM) that's its cheaper than MCU with EEPROM"
No surprises there, then!
Obviously, any MCU without a particular feature is going to be cheaper than an otherwise-comparable MCU with that feature, isn't it?!
www.8052.com/.../read.phtml