IZ1991 Datasheet PDF - Integral
Part Number | IZ1991 | |
Description | CIRCUIT OF MULTIFUNCTIONAL ELECTRONIC KEY | |
Manufacturers | Integral | |
Logo | ||
There is a preview and IZ1991 download ( pdf file ) link at the bottom of this page. Total 18 Pages |
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CIRCUIT OF MULTIFUNCTIONAL ELECTRONIC KEY
WITH DATA PROTECTION
(functional equvivalent DS1991 «Maxim-Dallas Semiconductor»)
IZ1991 – circuit of multifunctional electronic key with data protection is perposed for
autonomos identification in systems of access control, registration and identification of object.
Circuit performs following functions:
• One-time data writing in to ROM;
• Data storage and reading out of ROM;
• CRC-code (Cyclic Redundancy Check) generation ;
• Data transfer via 1-wire interface;
• Data and password storage for three independent keys.
Main features:
• 1152-bit secure memory with read/write possibility;
• Secure memory can be decoded only on matching 64-bit password
• Memory is partitioned into 3 blocks of 384 bits each
• 64-bit password and ID fields for each memory block
• 512-bit scratchpad ensures data transfer integrity
• Supply voltage (battery supply), UDD, from 2,7 to 3,3 V
• Operating temperature range from - 40 to +85°С
Table 1 - Contact pad description
Contact
pad num-
ber
Symbol
Function
01
TEST1
Test pad
02
TEST2
Test pad
03
GND
Common pin
04
DATA
Data I/O
05 UDD Supply voltage
06
TEST3
Test pad
07
TEST4
Test pad
08
TEST5
Test pad
09
TEST6
Test pad
10
TEST7
Test pad
11
TEST8
Test pad
12
TEST9
Test pad
13 TEST10 Test pad
Note – Contact pads TEST1 – TEST10 are purposed for testing and not used
by customer
Ver.01/01.10.2009
1
|
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IZ1991
General operation description
The IZ1991 multikey is read/write data carrier that acts as three separate electronic
keys, and provide 1152 bits of secured memory to user.
Each 384 bits key has 64-bit individual password and public ID fields . The password field
must be matched in order to access the secure memory. Data is transferred serially via the 1-
Wire protocol, which requires only a single data (signal) lead, a common (ground) & power sup-
ply leads.
The 512-bit scratchpad memory ensures integrity of data transfers to secure memory.
Data should first be written to the scratchpad where it can be read back. After the data verifica-
tion, a copy scratchpad memory command will transfer the data to the secure memory. This
process ensures data integrity when modifying the memory. Constant power supply of device is
requiered for data storage in scratchpad memory.
Fig.2 displays RAM map.
A 48-bit serial number is written into each IZ1991 during manufacturing process to guar-
antee unique identity which provide absolute control possibility.
Application fields include secure access control, debit tokens, work-in-progress tracking,
electronic monitoring of goods transportation and proprietary (private) data storage.
3F SECURE DATA
3F
SUBKEY 1 *
(01b)
10
0F
08
07
00
3F
PASSWORD
ID FIELD
SECURE DATA
SUBKEY *
(11b)
UNSECURE DATA
00
3F
SECURE DATA
SUBKEY 0 *
(00b)
10
0F
08
07
00
PASSWORD
ID FIELD
SUBKEY 2 *
(10b)
10
0F
08
07
00
PASSWORD
ID FIELD
BYTE WIDE
BYTE WIDE
___________
* The scratchpad & each subkey or has its own unique address.
Fig. 2. RAM map
Ver.01/01.10.2009
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for IZ1991 electronic component. |
Information | Total 18 Pages | |
Link URL | [ Copy URL to Clipboard ] | |
Download | [ IZ1991.PDF Datasheet ] |
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