ds2502/5/6unw uniqueware tm addonly memory ds2502/5/6unw 081298 1/2 special features ? 1024 bits, 16k bits or 64k bits electrically program- mable read only memory (eprom) communicates with the economy of one signal plus ground ? unique, factorylasered and tested 64bit registration number (8bit family code, 36bit serialization, 12bit uniqueware identifier 5e7h, 8bit crctester) assures absolute traceability because no two parts are alike. ? builtin multidrop controller ensures compatibility with other microlan products ? eprom partitioned into two 256bit pages for randomly accessing packetized data records ? each memory page can be permanently writepro- tected to prevent tampering ? device is an aadd onlyo memory where additional data can be programmed into eprom without disturbing existing data ? reduces control, address, data, power and program- ming signals to a single pin ? directly connects to a single port pin of a microproces- sor and communicates at up to 16.3k bits per second ? presence detector acknowledges when reader first applies voltage ? low cost to92/pr35 or 8pin soic and tsoc sur- face mount packages ? reads over a wide voltage range of 2.8v to 6.0v from 40 c to +85 c 3 2 1 to92/pr35 bottom view 1 2 3 4 8 7 6 5 tsoc package 123 65 4 top view 3.7 x 4.0 x 1.5 mm 8pin soic 3 2 1 see mech. drawings section see mech. drawings section see mech. drawings section pin assignment to92/pr35 tsoc soic pin 1 ground ground nc pin 2 data data nc pin 3 nc nc data pin 4 nc ground pins 5 to 8 nc nc silicon label description uniqueware addonly memories are factory pro- grammed versions of the ds2502 (1024 bit), the ds2505 (16k bit) and the ds2506 (64k bit) addonly memories, respectively. they differ from the regular devices in their custom rom family codes (see order- ing information) and the uniqueware identifier 5e7 in place of the upper 12 bits of the standard serialization field. for technical details on the devices please refer to the ds2502, ds2505 and ds2506 data sheets. uniqueware addonly memories are only available preprogrammed with customerspecific and writepro- tected data. uniqueware data fills at least one but no more than the first four pages of a device, depending on the length of the customersupplied data. this leaves up to three (ds2502unw), 63 (ds2505unw) or 255 (ds2506unw) memory pages available for program- ming in the application. for more details on uniqueware and how to set up data files, please refer to the uniqueware project setup manual, available as application note 99 from dallas semiconductor. the uniqueware project setup soft- ware is availble from the dallas semiconductor ftp site at ftp://ftp.dalsemi.com/pub/auto_id, unwsetup.exe.
ds2502/5/6unw 081298 2/2 ordering information memory size family code package ordering part number 1024 bits (4 pages) 89h to92 package 8pin 150 mil soic pkg. 6pin tsoc package ds2502unwpppp ds2502sunwpppp ds2502punwpppp 16k bits (64 pages) 8bh to92 package 6pin tsoc package ds2505unwpppp ds2505punwpppp 64k bits (256 pages) 8fh pr35 package 8pin 208 mil soic pkg. ds2506unwpppp ds2506sunwpppp pppp stands for the project id assigned to each individual data pattern at the time of the first order. sample uniqueware data structures sample 1: ethernet node address figure 1a (unused) crc16 company id value extension id value project id length msb lsb msb lsb msb lsb msb lsb 19 bytes ffh 2 bytes 3 bytes constant assigned by ieee 3 bytes serialization 4 bytes constant 1 byte 0ah high address low address physical address and data mapping figure 1b address 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 data xx xx ch cm cl hh mm ll 00 00 pp pp 0a xx xx = crc16, value depends on actual data ch cm cl = high, medium and low byte of the ieee assigned acompany ido hh mm ll = high, medium and low byte of the aextension ido or serialization pp pp = project id assigned by dallas semiconductor sample 2: eui64 firewire tm node address figure 2a (unused) crc16 company id value extension id value project id length msb lsb msb lsb msb lsb msb lsb 17 bytes ffh 2 bytes 3 bytes constant assigned by ieee 5 bytes serialization 4 bytes constant 1 byte 0ch high address low address physical address and data mapping figure 2b address 0e 0d 0c 0b 0a 09 08 07 06 05 04 03 02 01 00 data xx xx ch cm cl hh hm mm ml ll 00 00 pp pp 0c xx xx = crc16, value depends on actual data ch cm cl = high, medium and low byte of the ieee assigned acompany ido hh hm mm ml ll = high, medium and low byte of the aextension ido or serialization pp pp = project id assigned by dallas semiconductor firewire tm is a trademark of apple computer, inc.
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