Microcontrollers bring cryptography onboard - Microchip Technology

[R. A. Hettinga]

<http://www.electronicstalk.com/news/ari/ari172.html>

Electronicstalk


Product news
 received on 12 August 2004
 from Microchip Technology (contact details)

Microcontrollers bring cryptography onboard

Two new PIC Flash microcontrollers feature integrated Keeloq cryptographic
peripherals, providing a complete solution for remotely controlled security
systems and authentication applications.
Two new PIC Flash microcontrollers feature integrated Keeloq cryptographic
peripherals, providing a complete solution for remotely controlled security
systems and authentication applications.
Designers of such systems need an integrated solution that provides control
of system power consumption and ensures reliable battery-powered operation.
The new PIC12F635 and PIC16F636 microcontrollers meet these requirements by
providing the Keeloq cryptographic peripheral, nanoWatt Technology power
management modes, and reliable battery reset and detect features,
including: programmable low voltage detect (PLVD), a wake-up reset (WUR)
function, software-controlled brownout reset (BOR) and an extended watchdog
timer (EWDT).
Applications for the PIC12F635 and PIC16F636 include: remote security
control (remote keyless entry, passive keyless entry and remote door locks
and gate openers); authentication (property and identity); security systems
(remote sensors and their communications); and other general purpose
applications.
The successful Keeloq technology is based on a proprietary, nonlinear
encryption algorithm that creates a unique transmission on every use,
rendering code capture and resend schemes useless.
The new devices now feature this encryption algorithm as a hardware
peripheral integrated within the PIC microcontroller.
Key additional features of these two new PIC microcontrollers include: an
8MHz internal oscillator with software clock switching; ultra-low-power
wakeup (ULPW); up to 3.5Kbyte of Flash program memory, and up to 256byte of
EEPROM data memory; 64 or 128byte of RAM; and analogue comparators.
The PIC12F635 and PIC16F636 are supported by Microchip's world-class
development tools, including the MPLAB integrated development environment,
MPLAB ICE 2000 in-circuit emulator, MPLAB PM3 universal device programmer,
PICstart Plus low-cost development system, MPLAB ICD 2 in-circuit
debugger/programmer and the PICkit 1 Flash starter kit.
The two new PIC microcontrollers are available today for general sampling
and volume production.
The PIC12F635 offers a choice of 8-pin PDIP, SOIC and DFN-S packages, and
the PIC16F636 comes in 14-pin PDIP, SOIC and TSSOP outlines.


-- 
-----------------
R. A. Hettinga <mailto: rah at ibuc.com>
The Internet Bearer Underwriting Corporation <http://www.ibuc.com/>
44 Farquhar Street, Boston, MA 02131 USA
"... however it may deserve respect for its usefulness and antiquity,
[predicting the end of the world] has not been found agreeable to
experience." -- Edward Gibbon, 'Decline and Fall of the Roman Empire'

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