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PDF AT88SC0808CA Data sheet ( Hoja de datos )
| Número de pieza | AT88SC0808CA | |
| Descripción | CryptoMemory | |
| Fabricantes | ATMEL Corporation | |
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This is a summary document.
The complete document is
available on the Atmel website
at www.atmel.com.
AT88SC0808CA
Atmel CryptoMemory
SUMMARY DATASHEET
Features
One of a family of devices with user memories from 1-Kbit to 8-Kbits
8-Kbit (1-Kbyte) EEPROM user memory
Eight 1-Kbit (128-byte) zones
Self-timed write cycle
Single byte or 16-byte page write mode
Programmable access rights for each zone
2-Kbit configuration zone
37-byte OTP (One-Time Programmable) area for user-defined codes
160-byte area for user-defined keys and passwords
High security features
64-bit mutual authentication protocol (under license of ELVA)
Cryptographic Message Authentication Codes (MAC)
Stream encryption
Four key sets for authentication and encryption
Eight sets of two 24-bit passwords
Anti-tearing function
Voltage and frequency monitors
Smart card features
ISO 7816 Class B (3V) operation
ISO 7816-3 asynchronous T=0 Protocol (Gemplus® Patent) *
Multiple zones, key sets and passwords for multi-application use
Synchronous 2-wire serial interface for faster device initialization *
Programmable 8-byte answer-to-reset register (ATR)
ISO 7816-2 compliant modules
Embedded application features
Low voltage supply: 2.7V – 3.6V
Secure nonvolatile storage for sensitive system or user information
2-wire serial interface (TWI, 5V compatible)
1.0MHz compatibility for fast operation
Standard 8-lead plastic packages, green compliant (exceeds RoHS)
Same pin configuration as Atmel® AT24CXXX Serial EEPROM in SOIC and
PDIP packages
High reliability
Endurance: 100,000 cycles
Data retention: 10 years
ESD protection: 2,000V min
* Note: Modules available with either T=0 / 2-wire modes or 2-wire mode only
Atmel-5204IS-CryptoMem-AT88SC0808CA-Datasheet-Summary_072015
1 page  
4. Absolute Maximum Ratings*
Operating temperature....................−40°C to +85°C
Storage temperature ...................−65°C to + 150°C
Voltage on any pin
with respect to ground ...............− 0.7 to VCC +0.7V
Maximum operating voltage............................. 4.0V
DC output current ......................................... 5.0mA
*Notice:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage to
the device. This is a stress rating only and functional
operation of the device at these or any other condition
beyond those indicated in the operational sections of
this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of
time may affect device reliability.
Table 4-1. DC Characteristics
Applicable over recommended operating range from VCC = +2.7 to 3.6V, TAC = -40°C to +85°C (unless otherwise noted)
Symbol Parameter
Test Conditions
Min Typ Max Units
VCC(1)
Supply Voltage
2.7 3.6 V
ICC Supply Current
Async Read at 3.57MHz
5 mA
ICC Supply Current
Async Write at 3.57MHz
5 mA
ICC Supply Current
Synch Read at 1MHz
5 mA
ICC Supply Current
Synch Write at 1MHz
5 mA
ISB Standby Current
VIN = VCC or GND
100 A
VIL SDA/IO Input Low Voltage
0
VCC x 0.2
V
VIL CLK Input Low Voltage
0
VCC x 0.2
V
VIL
VIH(1)
VIH(1)
VIH(1)
RST Input Low Voltage
SDA/IO Input High Voltage
SCL/CLK Input High Voltage
RST Input High Voltage
0
VCC x 0.7
VCC x 0.7
VCC x 0.7
VCC x 0.2
5.5
5.5
5.5
V
V
V
V
IIL SDA/IO Input Low Current 0 < VIL < VCC x 0.15
15 A
IIL SCL/CLK Input Low Current 0 < VIL < VCC x 0.15
15 A
IIL
RST Input Low Current
0 < VIL < VCC x 0.15
50 A
IIH SDA/IO Input High Current VCC x 0.7 < VIH < VCC
20 A
IIH SCL/CLK Input High Current VCC x 0.7 < VIH < VCC
100 A
IIH
RST Input High Current
VCC x 0.7 < VIH < VCC
150 A
VOH SDA/IO Output High Voltage 20K ohm external pull-up VCC x 0.7
VCC
V
VOL SDA/IO Output Low Voltage IOL = 1mA
0
VCC x 0.15
V
IOH SDA/IO Output High Current VOH
20 A
IOL SDA/IO Output Low Current VOL
10 mA
Note: 1. To prevent latch up conditions from occurring during power up of the AT88SC0808CA, VCC must be turned on
before applying VIH. For powering down, VIH must be removed before turning VCC off.
AT88SC0808CA [Summary DATASHEET]
Atmel-5204IS-CryptoMem-AT88SC0808CA-Datasheet-Summary_072015
5
5 Page 
9. Security Fuses
There are three fuses on the device that must be blown during the device personalization process. Each fuse locks certain
portions of the configuration zone as OTP (One-Time Programmable) memory. Fuses are designed for the module
manufacturer, card manufacturer and card issuer and should be blown in sequence, although all programming of the device
and blowing of the fuses may be performed at one final step.
10.
Communication Security Modes
Communications between the device and host operate in three basic modes. Standard mode is the default mode for the
device after power-up. Authentication mode is activated by a successful authentication sequence. Encryption mode is
activated by a successful encryption activation following a successful authentication.
Table 10-1. Communication Security Modes(1)
Mode
Standard
Authentication
Encryption
Configuration Data
Clear
Clear
Clear
User Data
Clear
Clear
Encrypted
Passwords
Clear
Encrypted
Encrypted
Data Integrity Check
MDC(1)
MAC(1)
MAC(1)
Note:
1. Configuration data include viewable areas of the configuration zone except the passwords:
MDC: Modification Detection Code
MAC: Message Authentication Code
11. Security Options
11.1
Anti-Tearing
In the event of a power loss during a write cycle, the integrity of the device’s stored data is recoverable. This function is
optional: the host may choose to activate the anti-tearing function, depending on application requirements. When anti-tearing
is active, write commands take longer to execute, since more write cycles are required to complete them, and data is limited to
a maximum of eight bytes for each write request.
Data is written first into a buffer zone in EEPROM instead of the intended destination address, but with the same access
conditions. The data is then written in the required location. If this second write cycle is interrupted due to a power loss, the
device will automatically recover the data from the system buffer zone at the next power-up. Non-volatile buffering of the data
is done automatically by the device.
During power-up in applications using anti-tearing, the host is required to perform ACK polling in the event that the device
needs to carry out the data recovery process.
11.2
Write Lock
If a user zone is configured in the write lock mode, the lowest address byte of an 8-byte page constitutes a write access byte
for the bytes of that page.
Example: The write lock byte at $080 controls the bytes from $081 to $087
Figure 11-1. Write Lock Example
Address
$080
$0
11011001
$1
xxxx xxxx
locked
$2
xxxx xxxx
locked
$3
xxxx xxxx
$4
xxxx xxxx
$5
xxxx xxxx
locked
$6
xxxx xxxx
$7
xxxx xxxx
AT88SC0808CA [Summary DATASHEET]
Atmel-5204IS-CryptoMem-AT88SC0808CA-Datasheet-Summary_072015
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet AT88SC0808CA.PDF ] | |
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