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EP3C5E324A8ES

Cyclone III Device Handbook

Altera Corporation 

9–74

Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family

Remote System Upgrade

No Key Operation

Only unencrypted configuration bitstreams are allowed to configure the device.

FACTORY Mode

After power up, Cyclone III LS devices must be in FACTORY mode to program the

volatile key. The FACTORY private JTAG instruction must be issued after the device

successfully exits from POR and before the device starts loading the core

configuration data to enable access to all other instructions from the JTAG pins. The

device configuration data and AES volatile key are cleared if the FACTORY instruction

is executed.

Table 9–25 lists the configuration bitstream and the configuration mode supported for

each security mode.

Table 9–25. Security Modes Supported

Mode

Function

Configuration

File

Volatile Key

No Key

FACTORY

Secure

Encrypted

Board-Level

Testing

—

Volatile Key

Programming

Unencrypted

Unencrypted

—

Allowed Configuration Mode

PS with AES (without decompression).

FPP with AES (without decompression).

Remote update fast AS with AES

(without decompression).

Fast AS (without decompression).

All configuration modes that do not

engage the design security feature.

All configuration modes that do not

engage the design security feature.

—

Remote System Upgrade

Cyclone III devices support remote system upgrade in AS and AP configuration

schemes. Cyclone III LS devices support remote system upgrade in the AS

configuration scheme only. Remote system upgrade can also be implemented with

advanced Cyclone III features such as real-time decompression of configuration data

in the AS configuration scheme.

■ The serial configuration device uses the AS configuration scheme to configure

Cyclone III or Cyclone III LS devices

■ The supported parallel flash uses the AP configuration scheme to configure

Cyclone III devices

■ Remote system upgrade is not supported in the multi-device configuration chain

for any configuration scheme.

Cyclone III Device Handbook

Volume 1

August 2012 Altera Corporation

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