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CIII51016-2.2

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Cyclone III Device Handbook

Volume 1

August 2012

ISO

9001:2008

Registered

9. Configuration, Design Security, and

Remote System Upgrades in the

Cyclone III Device Family

This chapter describes the configuration, design security, and remote system

upgrades in Cyclone® III devices. The Cyclone III device family (Cyclone III and

Cyclone III LS devices) uses SRAM cells to store configuration data. Configuration

data must be downloaded to Cyclone III device family each time the device powers

up because SRAM memory is volatile.

The Cyclone III device family is configured using one of the following configuration

schemes:

■

Fast Active serial (AS)

■

Active parallel (AP) for Cyclone III devices only

■

Passive serial (PS)

■

Fast passive parallel (FPP)

■

Joint Test Action Group (JTAG)

All configuration schemes use an external configuration controller (for example,

MAX® II devices or a microprocessor), a configuration device, or a download cable.

The Cyclone III device family offers the following configuration features:

■

Configuration data decompression

■

Design security (for Cyclone III LS devices only)

■

Remote system upgrade

As Cyclone III LS devices play a role in larger and more critical designs in competitive

commercial and military environments, it is increasingly important to protect your

designs from copying, reverse engineering, and tampering. Cyclone III LS devices

address these concerns with 256-bit advanced encryption standard (AES)

programming file encryption and anti-tamper feature support to prevent tampering.

For more information about the design security feature in Cyclone III LS devices, refer

to “Design Security” on page 9–70.

System designers face difficult challenges such as shortened design cycles, evolving

standards, and system deployments in remote locations. The Cyclone III device

family helps overcome these challenges with inherent re-programmability and

dedicated circuitry to perform remote system upgrades. Remote system upgrades

help deliver feature enhancements and bug fixes without costly recalls, reduce

time-to-market, and extend product life. Remote system upgrades can also be

implemented with the advanced Cyclone III device family features such as real-time

decompression of configuration data. For more information about the remote system

upgrade feature in Cyclone III device family, refer to “Remote System Upgrade” on

page 9–74.

August 2012

CIII51016-2.2

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