EP3SL150F780I3N Altera, EP3SL150F780I3N Datasheet - Page 428

• Manufacturer Part Number: EP3SL150F780I3N
• Description: Stratix III
• Manufacturer: Altera

Remote System Upgrade Mode
Remote System
Upgrade Mode
12–6
Stratix III Device Handbook, Volume 1
A remote system upgrade involves storing a new application
configuration image or updating an existing one via the remote
communication interface. After an application configuration image is
stored or updated remotely, the user design in the Stratix III device
initiates a reconfiguration cycle with the new image. Any errors during
or after this cycle are detected by the dedicated remote system upgrade
circuitry and cause the device to automatically revert to the factory
image. The factory image then performs error processing and recovery.
The factory configuration is written to the serial configuration device
only once by the system manufacturer and should not be remotely
updated. On the other hand, application configurations may be remotely
updated in the system. Both images can initiate system reconfiguration.
Remote system upgrade has one mode of operation: remote update
mode. The remote update mode allows you to determine the
functionality of your system upon power-up and offers different features.
Overview
In remote update mode, Stratix III devices loads the factory configuration
image upon power up. The user-defined factory configuration
determines which application configuration is to be loaded and triggers
a reconfiguration cycle. The factory configuration may also contain
application logics.
When used with serial configuration devices, the remote update mode
allows an application configuration to start at any flash sector boundary.
This translates to a maximum of 128 pages in the EPCS64 device and
32 pages in the EPCS16 device, where the minimum size of each page is
512 KBits. Additionally, the remote update mode features a user
watchdog timer that determines the validity of an application
configuration.
Remote Update Mode
When a Stratix III device is first powered-up in remote update mode, it
loads the factory configuration located at page zero (page registers
PGM[23:0] = 24'b0). You should always store the factory
configuration image for your system at page address zero. This
corresponds to the start address location 0×000000 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
Altera Corporation
October 2007