DK-DEV-4SGX230N Altera, DK-DEV-4SGX230N Datasheet - Page 390

• Manufacturer Part Number: DK-DEV-4SGX230N
• Description: KIT DEVELOPMENT STRATIX IV
• Manufacturer: Altera
• Series: Stratix® IVr
• Type: FPGAr

Specifications of DK-DEV-4SGX230N

• Contents: Development Board, Universal Power Supply, Cables and Software
• Silicon Manufacturer: Altera
• Core Architecture: FPGA
• Core Sub-architecture: Stratix
• Silicon Core Number: EP4S
• Silicon Family Name: Stratix IV GX
• Rohs Compliant: Yes
• For Use With/related Products: EP4SGX230K
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 544-2594

10–56
Stratix IV Device Handbook Volume 1
1
The user watchdog timer is automatically disabled for factory configurations. For
more information about the user watchdog timer, refer to
page
If there is an error while loading the application configuration, the cause of the
reconfiguration is written by the dedicated circuitry to the remote system upgrade
status register. Actions that cause the remote system upgrade status register to be
written are:
■
■
■
■
Stratix IV devices automatically load the factory configuration located at page address
zero. This user-designed factory configuration can read the remote system upgrade
status register to determine the reason for the reconfiguration. The factory
configuration then takes appropriate error recovery steps and writes to the remote
system upgrade control register to determine the next application configuration to be
loaded.
When Stratix IV devices successfully load the application configuration, they enter
into user mode. In user mode, the soft logic (Nios II processor or state machine and
the remote communication interface) assists the Stratix IV device in determining
when a remote system update is arriving. When a remote system update arrives, the
soft logic receives the incoming data, writes it to the configuration memory device,
and triggers the device to load the factory configuration. The factory configuration
reads the remote system upgrade status register and control register, determines the
valid application configuration to load, writes the remote system upgrade control
register accordingly, and initiates system reconfiguration.
nSTATUS driven low externally
Internal CRC error
User watchdog timer time-out
A configuration reset (logic array nCONFIG signal or external nCONFIG pin assertion
to low)
10–61.
Chapter 10: Configuration, Design Security, and Remote System Upgrades in Stratix IV Devices
“User Watchdog Timer” on
Remote System Upgrade Mode
April 2011 Altera Corporation