EP2S180F1020C4 Datasheet, PDF (670/768 Pages) Altera Corporation – Stratix II Device Handbook, Volume 1

Remote System Upgrade Modes
remote access. This corresponds to PGM[2..0] = 000 of the enhanced
configuration device or standard flash memory, and start address
location 0x000000 in the serial configuration device.
The factory image is user designed and contains soft logic to:
■ Process any errors based on status information from the dedicated
remote system upgrade circuitry
■ Communicate with the remote host and receive new application
configurations, and store this new configuration data in the local
non-volatile memory device
■ Determine which application configuration is to be loaded into the
FPGA
■ Enable or disable the user watchdog timer and load its time-out
value (optional)
■ Instruct the dedicated remote system upgrade circuitry to initiate a
reconfiguration cycle
Figure 8–4 shows the transitions between the factory and application
configurations in remote update mode.
Figure 8–4. Transitions Between Configurations in Remote Update Mode
Configuration Error
Power Up
Configuration
Error
Factory
Configuration
(page 0)
Set Control Register
and Reconfigure
Application 1
Configuration
Reload a Different Application
Reload a Different Application
Set Control Register
and Reconfigure
Configuration Error
Application n
Configuration
8–10
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008