|
|
PDF DS1207 Data sheet ( Hoja de datos )
| Número de pieza | DS1207 | |
| Descripción | Time Key | |
| Fabricantes | Dallas Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de DS1207 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
U.com DS1207
ww.DataSheet4 TDimSe1K20e7yFEATURES
w • Cannot be deciphered by reverse engineering
• Time allotment from one day to 512 days for trial
periods, rentals, and leasing
m• Partitioned memory thwarts pirating
o• User-insertable packaging allows personal
.cpossession
• Exclusive blank keys on request
• Appropriate identification can be made with a 64-bit
Ureprogrammable memory
t4• Unreadable 64-bit match code virtually prevents
discovery by exhaustive search with over 1019
possibilities
e• Random data generation on incorrect match codes
obscures real accesses
e• 384 bits of secure read/write memory create
hadditional barriers by permitting data changes as
often as needed
S• Rapid erasure of identification, security match code
and secure read/write memory can occur if tampering
tais detected
• Durable and rugged
a• Applications include software authorization, gray
market software protection, proprietary data, financial
transactions, secure personnel areas, and system
.Daccess control
PIN ASSIGNMENT
DALLAS
DS1207
TimeKey
SIDE
15
BOTTOM: PIN VIEW
1.0 IN
See Mech. Drawings Section
PIN DESCRIPTION
Pin 1 NC
No connection
Pin 2 RST Reset
Pin 3 DQ
Data input/output
Pin 4 CLK Clock
Pin 5 GND Ground
DESCRIPTION
wThe DS1207 TimeKey is a miniature security system
that stores 64 bits of user-definable identification code
and a 64-bit security match code that protects 384 bits of
wread/write nonvolatile memory. The 64-bit identification
code and the security match code are programmed into
wthe TimeKey via a special program mode operation. Af-
mter programming, the TimeKey follows a procedure with
oa serial format to retrieve or update data. The TimeKey
U.cis set to expire from one day to 512 days or infinity, as
specified by the customer. The TimeKey starts its count-
down from the first access by the end user.
Interface cost to a microprocessor is minimized by
on-chip circuitry that permits data transfer with only
three signals: Clock (CLK), Reset (RST) and Data Input/
Output (DQ). Low pin count and a guided entry for a
mating receptacle overcome mechanical problems nor-
mally encountered with conventional integrated circuit
packaging, making the device transportable and
user-insertable.
www.DataSheet4021798 1/17
1 page  
NORMAL MODE: READ OR WRITE SECURE READ/WRITE MEMORY Figure 2A
RESET High
Write Command
24 Bits Including
Function Code
NO Match
for Read or
Write
Read 64 Bits Identification
Write 64 Bits Security Match
NO
Match
Output Garbled
Data
Read or write
384 bits based on
function code
Secure Read/Write
Memory
Stop
DS1207
RESET Low
Output in High Z
021798 5/17
5 Page 
FLOW CHART: PROGRAM MODE, LOCK NUMBER OF DAYS REGISTER Figure 8
RESET High
DS1207
Write Command 24 Bits Including
Function Code
NO Match
Program Mode
Lock # of Days
Number of Days Number of Days
Locked
Counter
Stop
RESET Low Output in High Z
FLOW CHART: PROGRAM MODE, ARM OSCILLATOR Figure 9
RESET High
Write Command
24 Bits Including
Function Code
NO
Match
Program Mode
to Arm Oscillator
Oscillator Armed
Stop
RESET Low Output in High Z
021798 11/17
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet DS1207.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| DS1200 | Serial RAM Chip |  Dallas Semiconducotr |
| DS1200-3 | AC-DC / Distributed Power Front-End 1U |  Emerson |
| DS1200-3-002 | AC-DC / Distributed Power Front-End 1U | Emerson |
| DS1200-3-005 | AC-DC / Distributed Power Front-End 1U | Emerson |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |