EP4SE360F35I4 Datasheet, PDF (417/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

Chapter 11: SEU Mitigation in Stratix IV Devices
Recovering From CRC Errors
11–11
5. In the Device and Pin Options dialog box, click the Error Detection CRC tab.
6. Turn on Enable error detection CRC (Figure 11–2).
Figure 11–2. Enabling the Error Detection CRC Feature in the Quartus II Software
7. In the Divide error check frequency by pull-down list, enter a valid divisor as
listed in Table 11–5 on page 11–8.
1 The divide value divides the frequency of the configuration oscillator output clock
that clocks the CRC circuitry.
8. Click OK.
Recovering From CRC Errors
The system that the Stratix IV device resides in must control device reconfiguration.
After detecting an error on the CRC_ERROR pin, strobing the nCONFIG signal low directs
the system to perform the reconfiguration at a time when it is safe for the system to
reconfigure the device.
When the data bit is rewritten with the correct value by reconfiguring the device, the
device functions correctly.
While soft errors are uncommon in Altera devices, certain high-reliability applications
require a design to account for these errors.
February 2011 Altera Corporation
Stratix IV Device Handbook
Volume 1