AT88SC1616C ATMEL [ATMEL Corporation], AT88SC1616C Datasheet - Page 2

• Manufacturer Part Number: AT88SC1616C
• Manufacturer: ATMEL [ATMEL Corporation]

Description
Pin
Descriptions
Supply Voltage (V
Clock (SCL/CLK)
Serial Data (SDA/IO)
2
AT88SC1616C
CC
)
The AT88SC1616C member of the CryptoMemory family is a high performance secure mem-
ory providing 16 Kbits of user memory with advanced security and cryptographic features built
in. The user memory is divided into 16 zones, each of which may be individually set with dif-
ferent security access rights or combined together to provide space for 1 to 16 data files. The
AT88SC1616C provides high security, low cost and ease of implentation for smart card appli-
cations without the need for a microprocessor operating system. The embedded
cryptographic engine provides for a dynamic, symmetric-mutual authentication between the
device and host as well as performing stream encryption for all data and passwords
exchanged between the device and host. Up to four unique key sets may be used for these
operations. The AT88SC1616C offers the ability to communicate with virtually any smart card
reader using the asynchronous T = 0 protocol defined in ISO 7816-3. For closed systems or
applications using the device on a circuit board. The AT88SC1616C will also communicate
using a synchronous two-wire protocol at clock speeds up to 2 MHz. In this communication
mode, up to 15 devices may be connected and individually addressed on the same serial data
bus. The two-wire protocol may also be used for high speed personalization of the device in
card form.
Figure 1. Block Diagram
The V
In the asynchronous T = 0 protocol, the SCL/CLK input is used to provide the device with a
carrier frequency f. The nominal length of one bit emitted on I/O is defined as an “elementary
time unit” (ETU) and is equal to 372/f.
When the synchronous protocol is used, the SCL/CLK input is used to positive edge clock
data into the device and negative edge clock data out of the device.
The SDA pin is bidirectional for serial data transfer. This pin is open-drain driven and may be
wire-ORed with any number of other open drain or open collector devices. An external pull-up
resistor should be connected between SDA and V
capacitance loading the SDA bus will determine the rise time of SDA. This rise time will deter-
mine the maximum frequency during Read operations. Low value pull-up resistors will allow
higher frequency operations while drawing higher average power supply current.
CC
input is a 2.7V to 5.5V positive voltage supplied by the host.
SCL/CLK
SDA/IO
GND
VCC
RST
Asynchronous
Management
Synchronous
ISO Interface
Reset Block
Interface
Power
Certification Unit
Answer to Reset
Encryption and
Authentication,
Data Transfer
Verification
Password
CC
. The value of this resistor and the system
Generator
EEPROM
Random
2030AS–09/01