The DS1217M is a nonvolatile (NV) RAM designed for portable applications requiring a rugged and durable package. The NV Cartridge has memory capacities from 64k x 8 to 512k x 8. The cartridge is accessed in continuous 32kB banks. Bank switching is accomplished under software control by pattern recognition from the address bus. A card edge connector is required for connection to a host system. A standard 30-pin connector can be used for direct mount to a printed circuit board. Alternatively, remote mounting can be accomplished with a ribbon cable terminated with a 28-pin DIP plug. The remote method can be used to retrofit existing systems which have JEDEC 28-pin byte-wide memory sites.
主な特長
User-insertable
Data retention greater than 5 years
Capacity up to 512k x 8
Standard bytewide pinout facilitates connection to JEDEC 28-pin DIP via ribbon cable
Software-controlled banks maintain 32 x 8 JEDEC 28-pin compatibility
Multiple cartridges can reside on a common bus
Automatic write protection circuitry safeguards against data loss
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