DS2502/5/6-UNW
UniqueWare
TM
Add-Only Memory
www.dalsemi.com
SPECIAL FEATURES
§
1024 bits, 16 kbits or 64 kbits 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.
§
Built-in multidrop controller ensures
compatibility with other MicroLAN products
§
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
§
Directly connects to a single port pin of a
microprocessor and communicates at up to
16.3k bits per second
§
Presence detector acknowledges when reader
first applies voltage
§
Low cost TO-92/PR-35 or 8-pin SOIC and
TSOC surface mount packages
§
Reads over a wide voltage range of 2.8V to
6.0V from -40°C to +85°C
PIN ASSIGNMENT
TO-92/PR-35
1
2
3
4
8
7
6
5
8-Pin SOIC
See Mech.
Drawings Section
NC
GND
DATA
TSOC PACKAGE
1
2
6
5
4
1 2 3
3
TOP VIEW
3.7 X 4.0 X 1.5 mm
BOTTOM VIEW
See Mech.
Drawings Section
See Mech.
Drawings Section
PIN ASSIGNMENT
TO-92/PR-35
Pin 1
Ground
Pin 2
Data
Pin 3
NC
Pin 4
-----
Pins 5 to 8 -----
TSOC
Ground
Data
NC
NC
NC
SOIC
NC
NC
Data
Ground
NC
SILICON LABEL DESCRIPTION
UniqueWare Add-Only Memories are factory programmed versions of the DS2502 (1024 bit), the
DS2505 (16-kbit) and the DS2506 (64k bit) Add-Only Memories, 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 DS2502, DS2505 and DS2506 data sheets.
UniqueWare Add-Only Memories 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,
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DS2502/5/6-UNW
depending on the length of the customer-supplied data. This leaves up to three (DS2502-UNW), 63
(DS2505-UNW) or 255 (DS2506-UNW) 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."
ORDERING INFORMATION
Memory Size
1024 bits
(4 pages)
Family Code
89h
Package
TO-92 package
8-pin 150 mil SOIC pkg.
6-pin TSOC package
TO-92 package
6-pin TSOC package
PR-35 package
8-pin 208 mil SOIC pkg.
Ordering Part Number
DS2502-UNW-pppp
DS2502S-UNW-pppp
DS2502P-UNW-pppp
DS2505-UNW-pppp
DS2505P-UNW-pppp
DS2506-UNW-pppp
DS2506S-UNW-pppp
16k bits
(64 pages)
64k bits
(256 pages)
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
MSB
LSB MSB
LSB
19 bytes
2 bytes
3 bytes constant
FFH
assigned by IEEE
high address
(unused)
Extension ID Value
MSB
LSB
3 bytes serialization
Project ID Length
MSB LSB
4 bytes
1 byte
constant
0AH
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 “Company ID”
hh mm ll = high, medium and low byte of the “Extension ID” or serialization
pp pp = Project ID assigned by Dallas Semiconductor
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SAMPLE 2: EUI-64 FireWire
TM
NODE ADDRESS
Figure 2a
CRC16
Company ID Value
MSB
LSB MSB
LSB
17 bytes
2 bytes
3 bytes constant
FFH
assigned by IEEE
high address
(unused)
Extension ID Value
MSB
LSB
5 bytes serialization
Project ID Length
MSB LSB
4 bytes
1 byte
constant
0CH
low address
PHYSICAL ADDRESS AND DATA MAPPING
Figure 2b
ADDRESS
DATA
0E
xx
0D
xx
0C
ch
0B
cm
0A
cl
09
hh
08
hm
07
mm
06
ml
05
ll
04
00
03
00
02
pp
01
pp
00
0C
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
FireWire
TM
is a trademark of Apple Computer, Inc.
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