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i need an external nvram to interface with my 89c51 which ic is best to use and readily available?? i tried looking online for navrams, but all i get is EEPROM
i dont want to use EEPROM as a nvram, coz i need to read and write to it a lot...
help pleasE??
For a car-park, the cost of a NVRAM chip can be ignored. However, life is complicated when sometimes multiple people from the same company posts in a thread, and somethimes the thread gets hijacked by other people.
Back to a car park - I would very much like such a contraption to have good sensors as extra backup. Especially if it isn't allowed to always return to "home" position after each reset! The oops factor gets less embarasing if it doesn't try to place two cards on top of each other ;)
i want to use as less i/o pins as possible to communicate with the nvram
What about using a serial flash? We're using the MX25L4005A from macronix. The MX25 series has models from 512kbit up to 64Mbit.
See http://www.macronix.com
What would be the advantage over conventional EEPROM?
What would be the advantage over FRAM?
He's already said he doesn't want to use EEPROM, and he doesn't need large capacity...
What would be the advantage over conventional EEPROM? read many, write many? What would be the advantage over FRAM? Only 4 pins instead of many pins?
What would be the advantage over FRAM? Only 4 pins instead of many pins? pins? IIC FRAM and IIC EEPROM uses TWO (uC) pins. SPI FRAM and SPI EEPROM uses 4 (uC) pins. parallel FRAM and parallel EEPROM uses bunches of (uC) pins.
Erik