EP4SE360F35I4 Datasheet, PDF (416/432 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

11–10
Chapter 11: SEU Mitigation in Stratix IV Devices
Error Detection Timing
Table 11–7 lists the estimated time for each CRC calculation with minimum and
maximum clock frequencies for Stratix IV devices. The minimum CRC calculation
time is calculated by using the maximum error detection frequency with a divisor
factor of one, and the maximum CRC calculation time is calculated by using the
minimum error detection frequency with a divisor factor of eight.
Table 11–7. CRC Calculation Time ⁽¹⁾
Device
EP4SGX70
EP4SGX110
EP4SGX180
EP4SGX230
EP4SGX290
EP4SGX360
EP4SGX530
EP4SE230
EP4SE360
EP4SE530
EP4SE820
EP4S40G2
EP4S40G5
EP4S100G2
EP4S100G3
EP4S100G4
EP4S100G5
Note to Table 11–7:
(1) These timing numbers are preliminary.
Minimum Time (ms)
111
111
225
225
296
296
398
225
296
398
577
225
398
225
398
398
398
Maximum Time (s)
30.90
30.90
62.44
62.44
82.05
82.05
110.38
62.44
82.05
110.38
160.00
62.44
110.38
62.44
110.38
110.38
110.38
Software Support
The Quartus II software version 8.0 and onwards supports the error detection CRC
feature for Stratix IV devices. Enabling this feature generates the CRC_ERROR output to
the optional dual purpose CRC_ERROR pin.
The error detection CRC feature is controlled by the Device and Pin Options dialog
box in the Quartus II software.
To enable the error detection feature using CRC, follow these steps:
1. Open the Quartus II software and load a project using a Stratix IV device.
2. On the Assignments menu, click Settings. The Settings dialog box is shown.
3. In the Category list, select Device. The Device page is shown.
4. Click Device and Pin Options. The Device and Pin Options dialog box is shown
(refer to Figure 11–2).
Stratix IV Device Handbook
Volume 1
February 2011 Altera Corporation