EP2AGX95EF29C6N Datasheet, PDF (352/380 Pages) Altera Corporation – Device Interfaces and Integration

9–66
Chapter 9: Configuration, Design Security, and Remote System Upgrades in Arria II Devices
Design Security
No Key Operation
Only unencrypted configuration bitstreams are allowed to configure the device.
Table 9–25 lists the different security modes and configuration bitstream supported
for each mode.
Table 9–25. Security Modes Supported
Mode (1)
Function
Volatile key
Secure
Board-level testing
Non-volatile key
Secure
Board-level testing
Volatile key with tamper protection bit set (2)
Secure (tamper resistant)
(3)
Non-volatile key with tamper protection bit set
Secure (tamper resistant)
(3)
Notes to Table 9–25:
(1) In No key operation, only the unencrypted configuration file is supported.
(2) Arria II GZ devices do not support this feature.
(3) The tamper protection bit setting does not prevent the device from being reconfigured.
Configuration File
Encrypted
Unencrypted
Encrypted
Unencrypted
Encrypted
Encrypted
Supported Configuration Schemes
The Arria II device supports only selected configuration schemes, depending on the
security mode you select when you encrypt the Arria II device.
Figure 9–30 shows the restrictions of each security mode when encrypting Arria II
devices.
Figure 9–30. Arria II Security Modes—Sequence and Restrictions
Volatile Key
Unencrypted or
Encrypted
Configuration File
No Key
Unencrypted
Configuration File
Non-Volatile Key
Unencrypted or
Encrypted
Configuration File
Volatile Key with
Tamper-Protection
Bit Set (1)
CoCnEofinngEfcuin_(grr2^ycaupr₎tryitaoeptnditoeFndilFeile
Non-Volatile Key
with
Tamper-Protection
Bit Set
Encrypted
Configuration File
Notes to Figure 9–30:
(1) Arria II GZ devices do not support this feature.
(2) Arria II devices do not accept encrypted configuration files if the volatile key is erased. If the volatile key is erased, you must use the volatile key
without the tamper-protection bit set to reprogram the key.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
July 2012 Altera Corporation