EP4CE30F29C7N Datasheet, PDF (247/488 Pages) Altera Corporation – Cyclone IV Device Handbook, Volume 1

May 2013
CYIV-51009-1.3
CYIV-51009-1.3
9. SEU Mitigation in Cyclone IV Devices
This chapter describes the cyclical redundancy check (CRC) error detection feature in
user mode and how to recover from soft errors.
1 Configuration error detection is supported in all Cyclone^® IV devices including
Cyclone IV GX devices, Cyclone IV E devices with 1.0-V core voltage, and
Cyclone IV E devices with 1.2-V core voltage. However, user mode error detection is
only supported in Cyclone IV GX devices and Cyclone IV E devices with 1.2-V core
voltage.
Dedicated circuitry built into Cyclone IV devices consists of a CRC error detection
feature that can optionally check for a single-event upset (SEU) continuously and
automatically.
In critical applications used in the fields of avionics, telecommunications, system
control, medical, and military applications, it is important to be able to:
■ Confirm the accuracy of the configuration data stored in an FPGA device
■ Alert the system to an occurrence of a configuration error
Using the CRC error detection feature for Cyclone IV devices does not impact fitting
or performance.
This chapter contains the following sections:
■ “Configuration Error Detection” on page 9–1
■ “User Mode Error Detection” on page 9–2
■ “Automated SEU Detection” on page 9–3
■ “CRC_ERROR Pin” on page 9–3
■ “Error Detection Block” on page 9–4
■ “Error Detection Timing” on page 9–5
■ “Software Support” on page 9–6
■ “Recovering from CRC Errors” on page 9–9
Configuration Error Detection
1 Configuration error detection is available in all Cyclone IV devices including
Cyclone IV GX devices, Cyclone IV E devices with 1.0-V core voltage, and
Cyclone IV E devices with 1.2-V core voltage.
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Cyclone IV Device Handbook,
Volume 1
May 2013
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