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| DS1982/5/6U UniqueWare iButtonTM www.dalsemi.com SPECIAL FEATURES 1024 bits, 16K bits or 64K bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground Unique, factory lasered and tested 64-bit registration number (8-bit family code, 36-bit serialization, 12-bit UniqueWare Identifier 5E7H, 8-bit CRC tester) assures absolute traceability because no two parts are alike EPROM partitioned into 256-bit pages for randomly accessing packetized data records Each memory page can be permanently write-protected to prevent tampering Device is an "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 8-bit family code specifies device communications requirements to reader Presence detector acknowledges when reader first applies voltage Reads over a wide voltage range of 2.8V to 6.0V from -40C to +85C COMMON iButton FEATURES Multidrop controller for MicroLAN Digital identification and information by momentary contact Chip-based data carrier compactly stores information Data can be accessed while affixed to object Economically communicates to bus master with a single digital signal at 16.3k bits per second Standard 16 mm diameter and 1-Wire protocol ensure compatibility with iButton family Button Shape is self-aligning with cup- shaped probes Durable stainless steel case engraved with registration number withstands harsh environments Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim Presence detector acknowledges when reader first applies voltage Meets UL#913 (4th edit.); Intrinsically Safe Apparatus, Approved under Entity Concept for use in Class I, Division 1, Group A, B, C and D Locations (application pending) iButton DESCRIPTION UniqueWare iButtons are factory programmed versions of the DS1982 (1024 bit), the DS1985 (16K bit) and the DS1986 (64K bit) Add-Only iButtons, respectively. They differ from the regular devices in their custom ROM family codes (see Ordering 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 DS1982, DS1985 and DS1986 data sheets. UniqueWare Add-Only iButtons are only available preprogrammed with customer-specific and write- protected data. UniqueWare data fills at least one but no more than the first four pages of a device, depending on the length of the customer-supplied data. This leaves up to three (DS1982U), 63 (DS1985U) or 255 (DS1986U) memory pages available for programming 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 Software is available from the Dallas Semiconductor FTP Site at ftp://ftp.dalsemi.com/pub/auto_id, file name "unwsetup.exe". 1 of 2 010700 DS1982/5/6U ORDERING INFORMATION Memory Size 1024 bits (4 pages) 16K bits (64 pages) 64K bits (256 pages) Family Code 89h Package F3 MicroCan F5 MicroCan F3 MicroCan F5 MicroCan F3 MicroCan F5 MicroCan Ordering Part Number DS1982U-F3-pppp DS1982U-F5-pppp DS1985U-F3-pppp DS1985U-F5-pppp DS1986U-F3-pppp DS1986U-F5-pppp 8Bh 8Fh 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 CRC16 Company ID Value Extension ID Value Project ID Length MSB LSB MSB LSB MSB LSB MSB LSB 19 bytes 2 bytes 3 bytes constant 3 bytes serialization 4 bytes 1 byte FFH assigned by IEEE constant 0AH high address low address (unused) PHYSICAL ADDRESS AND DATA MAPPING Figure 1b 0C 0B 0A 09 08 07 06 05 04 03 02 Address xx xx ch cm cl hh mm ll 00 00 pp Data xx xx = CRC16, value depends on actual data ch cm cl = high, medium and low byte of the IEEE assigned "Company ID" hh mm ll = high, medium and low byte of the "Extension ID" or serialization pp pp = Project ID assigned by Dallas Semiconductor 01 pp 00 0A SAMPLE 2: EUI-64 FireWireTM NODE ADDRESS Figure 2a CRC16 Company ID Value Extension ID Value Project ID Length MSB LSB MSB LSB MSB LSB MSB LSB 17 bytes 2 bytes 3 bytes constant 5 bytes serialization 4 bytes 1 byte FFH assigned by IEEE constant 0CH high address low address (unused) PHYSICAL ADDRESS AND DATA MAPPING Figure 2b 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 Address xx xx ch cm cl hh hm mm ml ll 00 00 pp pp Data xx xx = CRC16, value depends on actual data ch cm cl = high, medium and low byte of the IEEE assigned "Company ID" hh hm mm ml ll = high, medium and low byte of the "Extension ID" or serialization pp pp = Project ID assigned by Dallas Semiconductor FireWireTM is a trademark of Apple Computer, Inc. 2 of 2 00 0C |
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