Arria V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683213
Date 7/24/2020
Document Table of Contents

10.1.3. JTAG Secure Mode

If you enable the tamper-protection bit, the Arria® V device is in JTAG secure mode after power up. In the JTAG secure mode, the JTAG pins support only the BYPASS, SAMPLE/PRELOAD , EXTEST, IDCODE, SHIFT_EDERROR_REG , and UNLOCK instructions. Issue the UNLOCK JTAG instruction to enable support for other JTAG instructions.

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