Security Key Types - Altera Cyclone V Device Handbook

7-36

Security Key Types

JTAG Boundary-Scan Testing in Cyclone V Devices
Provides more information about JTAG binary instruction code related to the
instructions.
Security Key Types
Cyclone V devices offer two types of keys—volatile and non-volatile. The following table lists the differences
between the volatile key and non-volatile keys.
Table 7-9: Security Key Types
Key Types
Volatile
Non-volatile
Both non-volatile and volatile key programming offers protection from reverse engineering and copying. If
you set the tamper-protection bit, the design is also protected from tampering.
You can perform key programming through the JTAG pins interface. Ensure that the
high before any key-programming attempts.
Note: To clear the volatile key, issue the
been cleared, issue the
Related Information
Supported JTAG Instruction
Provides more information about the
JTAG Boundary-Scan Testing in Cyclone V Devices
Provides more information about the
Cyclone V Device Family Pin Connection Guidelines
Provides more information about the V
Cyclone V Device Datasheet
Provides more information about battery specifications.
(20)
V is a dedicated power supply for volatile key storage. V
CCBAT
register regardless of the on-chip supply condition.
(21)
Third-party vendors offer in-socket programming.
Altera Corporation
Key Programmability Power Supply for Key
Reprogrammable Required external
battery, V
Erasable
One-time Does not require an
programming external battery
KEY_CLR_VREG
JTAG instruction.
KEY_VERIFY
on page 9-3
KEY_CLR_VREG
KEY_CLR_VREG
pin connection recommendations.
CCBAT
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
Programming Method
Storage
On-board
(20)
CCBAT
On-board and in-socket
programming
JTAG instruction. To verify the volatile key has
and instructions.
KEY_VERIFY
and JTAG instructions.
KEY_VERIFY
continuously supplies power to the volatile
CCBAT
CV-52007
2014.01.10
and
LOCK UNLOCK
(21)
pin is released
nSTATUS
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