Cyclone® V SX, ST and SE SoC Device Errata

ID 683618
Date 9/25/2015
Document Table of Contents False Configuration Failure in Active Serial Multi-Device Configuration x1 Mode


In Active Serial (AS) multi-device configuration x1 mode, the error checking for CONF_DONE release may not operate correctly. Because of this, false configuration errors may result. The failure is indicated by CONF_DONE going high followed by nSTATUS going low and reconfiguration repeatedly initiated.


To overcome this issue, perform the following steps:

  1. Disable the CONF_DONE error checking in AS multi-device configuration mode:
    1. If you are using Quartus II version 12.0 software or older, check the “Disable AS mode CONF_DONE error check” option. This option can be found in the “Advanced” button under the Convert Programming File window.
    2. If you are using Quartus II version 12.0 SP1 or later, the error checking is disabled automatically for AS multi-device configuration POF file generation.
  2. Enable the INIT_DONE pin option:
    1. To ensure successful configuration, Intel recommends that you enable the INIT_DONE optional pin for devices in the configuration chain. On the board, do not tie INIT_DONE pins together between master and slave devices. Monitor the INIT_DONE status for each device to ensure a successful transition into user-mode.
Note: Other configuration modes (JTAG, Fast Passive Parallel (FPP), Passive Serial (PS) single and multi device configuration, and AS single device configuration) are not affected.


Affects: Cyclone® V SX, ST, and SE devices

Status: No planned fix