Features
General
•
•
•
•
•
•
•
High-performance, Low-power secureAVR
Enhanced RISC Architecture
– 133 Powerful Instructions (Most Executed in a Single Clock Cycle)
Low-power Idle and Power-down Modes
Bond Pad Locations Conforming to ISO 7816-2
ESD Protection to ± 6000V
Operating Ranges: from 2.7V to 5.5V
Compliant with GSM, 3GPP and EMV 2000 Specifications; PC Industry Compatible
Available in Wafers, Modules and Industry-standard Packages
Memory
•
256K Bytes of ROM Program Memory
•
72K Bytes of EEPROM, Including 128-byte OTP Area and 384-byte Bit-addressable
Bytes
– 1 to 128-byte Program/Erase
– 1 ms Program, 1 ms Erase
– Typically More than 500,000 Write/Erase Cycles at a Temperature of 25
o
C
– 10 Years Data Retention
•
EEPROM Erase Only Mode
•
Write EEPROM With or Without Autoerase
•
6K Bytes of RAM
Secure
Microcontroller
for Smart Cards
AT90SC25672R
Summary
Peripherals
•
ISO 7816 Controller
•
•
•
•
•
•
•
•
– Up to 625 kbps at 5 MHz
– Compliant with T = 0 and T = 1 Protocols
One I/O Port
Programmable Internal Oscillator (Up to 20 MHz on ROM)
Two 16-bit Timers
Random Number Generator (RNG)
2-level, 7-vector Interrupt Controller
Hardware DES and Triple DES DPA Resistant
Checksum Accelerator
CRC 16 Engine (Compliant with ISO/IEC 3309)
Security
•
•
•
•
•
•
•
Dedicated Hardware for Protection Against SPA/DPA Attacks
Advanced Protection Against Physical Attack
Environmental Protection Systems
Voltage Monitor
Frequency Monitor
Light Protection
Secure Memory Management/Access Protection (Supervisor Mode)
Development Tools
•
Voyager Emulation Platform (ATV2 Advanced) to Support Software Development
•
IAR Systems C-Spy Debugger or Atmel’s AVR Studio Version 4.07 or Above
•
Software Libraries and Application Notes
Rev. 1585AS–SMIC–06/03
Note: This is a summary document. A complete document will be
1
available under NDA. For more information, please contact your
local Atmel sales office.
Description
The AT90SC25672R is a low-power, high-performance, 8/16-bit microcontroller with
ROM program memory, EEPROM data memory, based on the secureAVR enhanced
RISC architecture. By executing powerful instructions in a single clock cycle, the
AT90SC25672R achieves throughputs close to 1 MIPS per MHz. Its Harvard architec-
ture includes 32 general-purpose working registers directly connected to the ALU,
allowing two independent registers to be accessed in one single instruction executed in
one clock cycle.
The AT90SC25672R uses a new AVR architecture, the secureAVR that allows the lin-
ear addressing of up to 8M bytes of code and up to 16M bytes of data as well as a
number of new functional and security features.
The ability to map the EEPROM in the code space allows parts of the program memory
to be reprogrammed in-system. This technology combined with the versatile 8/16-bit
CPU on a monolithic chip provides a highly flexible and cost-effective solution to many
smart card applications.
Additional security features include power and frequency protection logic, logical scram-
bling on program data and addresses, Power Analysis countermeasures and memory
accesses controlled by a supervisor mode. A block diagram of the AT90SC25672R is
shown in Figure 1.
Figure 1.
AT90SC25672R secureAVR RISC Architecture
Data Bus
8-bit
OTP
EEPROM
User Memory
Program
Memory
16
Instruction
Register
16
ALU
Instruction
Decoder
16
Control
Lines
Status
Register
Timer
Reset
Circuit
DES
DPA Counter
Measures
CRC and
Checksum
Accelerator
RST
8
8
General
Purpose
Registers
X
Y
Z
CLK
Access
Control
RNG
Secure
Control
GND
V
CC
PC
Access
Control
8
RAM
Data Memory
Interrupt
Unit
ISO 7816
Controller
ISO 7816
I/O Port 0
IN/OUT0
2
AT90SC25672R
1585AS–SMIC–10Jun03
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© Atmel Corporation 2003.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty
which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors
which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does
not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted
by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use as critical
components in life support devices or systems.
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®
is a registered trademark of Atmel; AVR
™
is a trademark of Atmel.
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®
is a registered trademark of IAR Systems AB. Other terms and product names may be the trademark of
others.
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1585AS–SMIC–10Jun03
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