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參數(shù)資料
| 型號： | DS1205S |
| 英文描述： | MultiKey Chip |
| 中文描述： | 多密鑰芯片 |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 138K |
| 代理商： | DS1205S |
DS1205S
MultiKey Chip
DS1205S
021798 1/17
FEATURES
Three secure read/write data partitions of 384 bits
each
One non-secure read/write data partition of 512 bits
Secure data cannot be deciphered by reverse engi-
neering
Guaranteed unique, 48-bit, laser etched serial
number
64-bit password and I.D. fields provide positive identi-
fication and security for each secure data partition
Maximum data transfer rate of 2 million bits/second
Low-power CMOS circuitry
Access via 3-wire or 1-wire interface
Applications include proprietary data, financial trans-
actions, secure personnel areas, and systems ac-
cess control
DESCRIPTION
The DS1205S MultiKey Chip is an enhanced version of
the DS1204U Electronic Key which has both a standard
3-wire interface (data, clock, and reset) and a 1-wire in-
terface. The DS1205S MultiKey has three secure read/
write subkeys which are each 384 bits in length. In addi-
tion, there is a 512-bit read/write scratchpad which can
be used as a non-secure data area or as a holding regis-
ter for data transfer to one of the three subkeys. Each
subkey within the part is uniquely addressable on byte
boundaries.
PIN ASSIGNMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VCCI
NC
DQ
NC
CLK
VCCO
NC
GND
NC
DQOE
BAT
NC
NC
GND
I/O
RST
DS1205S 16-Pin SOIC (300 mil)
See Mech. Drawings
Section
PIN DESCRIPTION
V
CCI
RST
DQ
CLK
GND
BAT
DQOE
I/O
V
CCO
– +5V Supply (Battery Backup Mode)
– Reset (3-Wire)
– Data (3-Wire)
– Clock (3-Wire)
– Ground
– Battery (+) (Battery Backup Mode)
– Data Available (3-Wire)
– Data I/O (1-Wire)
– Battery (+) (Battery Powered Mode)
OPERATING MODES
There are two modes of operation for powering the
DS1205S MultiKey Chip. In the Normal Mode (Battery
Backup), V
CC
power is supplied to the part on the V
CCI
pin, while the battery backup source is applied to the
BAT pin. In this mode of operation, the chip supply is
switched internally between V
CCI
and BAT (depending
on which is higher) and this level is presented internally
to the V
CCO
pin. In the Battery Operate Mode, the bat-
tery supply is connected directly to the V
CCO
pin while
the V
CCI
and BAT pins are grounded.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1205V | MultiKey |
| DS1208 | dallas semiconductor reliability report |
| DS1210 | Nonvolatile Controller Chip |
| DS1211 | Nonvolatile Controller x 8 Chip |
| DS1217M | Nonvolatile Read/Write Cartridge |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1205V | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:MultiKey |
| DS1206N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral Interface |
| DS1206S | 制造商:Maxim Integrated Products 功能描述: |
| DS1206SN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral Interface |
| DS1207 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MISC MEMORY|MODULE|5PIN|PLASTIC |
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