DS2502P-UNW [DALLAS]
UniqueWare Add-Only Memory; 的UniqueWare只添加存储器
| 型号： | DS2502P-UNW |
| 厂家： | 
DALLAS SEMICONDUCTOR |
| 描述： | UniqueWare Add-Only Memory |
| 文件： | 总3页 (文件大小：50K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DS2502/5/6-UNW
UniqueWareTM Add-Only Memory
www.dalsemi.com
SPECIAL FEATURES
§ 1024 bits, 16 kbits or 64 kbits Electrically
PIN ASSIGNMENT
TO-92/PR-35
Programmable Read Only Memory (EPROM)
communicates with the economy of one
signal plus ground
1
8
2
3
4
7
6
5
§ 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
8-Pin SOIC
See Mech.
Drawings Section
TSOC PACKAGE
1
2
3
6
5
4
1 2 3
TOP VIEW
3.7 X 4.0 X 1.5 mm
See Mech.
Drawings Section
BOTTOM VIEW
See Mech.
Drawings Section
§ 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 TSOC
SOIC
Pin 1
Pin 2
Pin 3
Pin 4
Ground
Data
NC
Ground NC
Data
NC
NC
NC
NC
Data
Ground
NC
-----
Pins 5 to 8 -----
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,
1 of 3
102099
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 Family Code Package
Ordering Part Number
1024 bits
89h
TO-92 package
DS2502-UNW-pppp
(4 pages)
8-pin 150 mil SOIC pkg. DS2502S-UNW-pppp
6-pin TSOC package
DS2502P-UNW-pppp
16k bits
(64 pages)
8Bh
8Fh
TO-92 package
6-pin TSOC package
DS2505-UNW-pppp
DS2505P-UNW-pppp
64k bits
PR-35 package
DS2506-UNW-pppp
(256 pages)
8-pin 208 mil SOIC pkg. DS2506S-UNW-pppp
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
MSB LSB MSB
2 bytes 3 bytes constant
assigned by IEEE
Company ID Value Extension ID Value Project ID Length
LSB MSB LSB MSB LSB
3 bytes serialization
19 bytes
FFH
4 bytes
1 byte
0AH
constant
high address
low address
PHYSICAL ADDRESS AND DATA MAPPING Figure 1b
ADDRESS
DATA
0C 0B 0A 09
xx xx ch cm
08 07
06
05 04 03 02 01
ll
00
cl hh mm
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
2 of 3
102099
DS2502/5/6-UNW
SAMPLE 2: EUI-64 FireWireTM NODE ADDRESS Figure 2a
(unused)
CRC16
MSB
2 bytes
Company ID Value Extension ID Value Project ID Length
LSB MSB
3 bytes constant
assigned by IEEE
LSB MSB
LSB MSB LSB
17 bytes
FFH
5 bytes serialization
4 bytes
1 byte
0CH
constant
high address
low address
PHYSICAL ADDRESS AND DATA MAPPING Figure 2b
ADDRESS
DATA
0E 0D 0C
xx xx ch
0B
cm
0A 09
08
07
06
05 04 03 02 01
00
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 “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.
3 of 3
102099
相关型号：
©2020 ICPDF网 联系我们和版权申明