DS2502P-E64+

DS2502P-E64+ is an IEEE EUI-64 node address chip. It is a variant of the DS2502 1024-bit add-only memory. It differs from the standard DS2502 in its custom ROM family code 89h, and the UniqueWare Identifier 5E7h in place of the upper 12 bits of the standard ROM serialization field. Otherwise, the electrical and logical behavior is identical to that of the DS2502. The first 32 bytes of the DS2502-E64’s EPROM memory contain a globally unique 64-bit node address (EUI-64) and are write-protected. The data structure follows the conventions of UniqueWare devices using Default Data Structure. This format is also known as UDP (universal data packet) and is commonly used in 1-Wire APIs. Therefore, if using one of those APIs one can call a high level function to read and verifying the inverted CRC16.

• EUI-64 with 76 bits user-programmable OTP-EPROM communicates with economy of one signal plus ground
• Meets the node identification requirements of IEEE Standard 1394-1995 (FireWire)
• Unique, factory-lasered and tested 64-bit registration number
• Built-in multidrop controller ensures compatibility with other 1-Wire products
• Add only memory where additional data can be programmed into EPROM without disturbing existing data
• Reduces control, address, data, power and programming signals to a single pin
• Directly connects to a single port pin of a microprocessor and communicates at up to 16.3kbits/sec
• Presence detector acknowledges when reader first applies voltage