DK-DEV-5SGXEA7N【PDF 257/527 页】KIT DEV STRATIX V FPGA 5SGXEA7

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SV51010

2014.01.10

Security Key Types

8-37

? JTAG Boundary-Scan Testing in Stratix V Devices

Provides more information about JTAG binary instruction code related to the LOCK and UNLOCK

instructions.

Security Key Types

Stratix 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 8-9: Security Key Types

Key Types

Key Programmability

Power Supply for Key

Programming Method

Storage

Volatile

? Reprogrammable Required external

battery, V CCBAT (16)

? Erasable

On-board

Non-volatile

One-time

programming

Does not require an

external battery

On-board and in-socket

programming (17)

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 nSTATUS pin is released

high before any key-programming attempts.

Note: To clear the volatile key, issue the KEY_CLR_VREG JTAG instruction. To verify the volatile key has

been cleared, issue the KEY_VERIFY JTAG instruction.

Related Information

? Supported JTAG Instruction on page 10-3

Provides more information about the KEY_CLR_VREG and KEY_VERIFY instructions.

? JTAG Boundary-Scan Testing in Stratix V Devices

Provides more information about the KEY_CLR_VREG and KEY_VERIFY JTAG instructions.

? Stratix V E, GS, and GX Device Family Pin Connection Guidelines

Provides more information about the V CCBAT pin connection recommendations.

? Stratix V GT Device Family Pin Connection Guidelines

Provides more information about the V CCBAT pin connection recommendations.

? Stratix V Device Datasheet

Provides more information about battery specifications.

(16)

(17)

V CCBAT is a dedicated power supply for volatile key storage. V CCBAT continuously supplies power to the volatile

register regardless of the on-chip supply condition.

Third-party vendors offer in-socket programming.

Configuration, Design Security, and Remote System Upgrades in Stratix V Devices

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