EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 435

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Altera Corporation
October 2007
Remote System Upgrade State Machine
The remote system upgrade control and update registers have identical
bit definitions, but serve different roles (refer to
registers can only be updated when the device is loaded with a factory
configuration image, the update register writes are controlled by the user
logic; the control register writes are controlled by the remote system
upgrade state machine.
In factory configurations, the user logic sends the AnF bit (set high), the
page address, and the watchdog timer settings for the next application
configuration bit to the update register. When the logic array
configuration reset (RU_nCONFIG) goes high, the remote system upgrade
state machine updates the control register with the contents of the update
register and initiates system reconfiguration from the new application
page.
In the event of an error or reconfiguration trigger condition, the remote
system upgrade state machine directs the system to load a factory or
application configuration (page zero or page one, based on the mode and
error condition) by setting the control register accordingly.
the contents of the control register after such an event occurs for all
possible error or trigger conditions.
The remote system upgrade status register is updated by the dedicated
error monitoring circuitry after an error condition but before the factory
configuration is loaded.
Capture operations during factory configuration access the contents of
the update register. This feature is used by the user logic to verify that the
page address and watchdog timer settings were written correctly. Read
operations in application configurations access the contents of the control
register. This information is used by the user logic in the application
configuration.
CORE
Table 12–5. Control Register Contents After an Error or Reconfiguration
Trigger Condition
Reconfiguration Error/Trigger
triggered reconfiguration
nCONFIG
nSTATUS
Wd
CRC
time out
error
reset
error
Remote System Upgrades With Stratix III Devices
Stratix III Device Handbook, Volume 1
Control Register Setting
Remote Update
Update register
All bits are 0
All bits are 0
All bits are 0
All bits are 0
Table
12–2). While both
Table 12–5
12–13
lists