EP4CE55F23C8 Altera, EP4CE55F23C8 Datasheet - Page 237

• Manufacturer Part Number: EP4CE55F23C8
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Remote System Upgrade
© December 2010 Altera Corporation
1
The factory configuration image is user-designed and contains soft logic (Nios II
processor or state machine and the remote communication interface) to:
■
■
■
■
■
Figure 8–32
configuration in remote update mode.
Figure 8–32. Transitions Between Configurations in Remote Update Mode
After power up or a configuration error, the factory configuration logic writes the
remote system upgrade control register to specify the address of the application
configuration to be loaded. The factory configuration also specifies whether or not to
enable the user watchdog timer for the application configuration and, if enabled,
specifies the timer setting.
Only valid application configurations designed for remote update mode include the
logic to reset the timer in user mode. For more information about the user watchdog
timer, refer to the
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 the new configuration data in the local non-volatile memory device
Determine the application configuration to be loaded into the Cyclone IV device
Enable or disable the user watchdog timer and load its time-out value (optional)
Instruct the dedicated remote system upgrade circuitry to start a reconfiguration
cycle
Configuration
Error
Power Up
shows the transitions between the factory configuration and application
“User Watchdog Timer” on page
Configuration
Factory
Configuration Error
Set Control Register
Configuration Error
and Reconfigure
Set Control Register
and Reconfigure
Reload a Different Application
Reload a Different Application
8–78.
Cyclone IV Device Handbook, Volume 1
Configuration
Application n
Application 1
Configuration
8–71