EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 346

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Remote System Upgrade With Cyclone III Devices
12–6
Cyclone III Device Handbook, Volume 1
using the AS configuration scheme. A factory configuration image is a
bitstream for the Cyclone III device(s) in your system that is programmed
during production and is the fall-back image when an error occurs. This
image is stored in non-volatile memory and is never updated or modified
using remote access. This corresponds to the start address location
0x000000 in the serial configuration device.
Upon power up in remote update in the AP configuration scheme, the
Cyclone III device loads the default factory configuration located at
address boot_address[23:0] = 24'h010000 = 24'b1 0000
0000 0000 0000. You can change the default factory configuration
address to any desired address using the JTAG instruction
APFC_BOOT_ADDR. The factory configuration image is stored in non-
volatile memory and is never updated or modified using remote access.
This corresponds to the default start address location 0x010000 (or the
updated address if the default address is changed) in the supported
parallel flash memory.
For information about the application of the JTAG instruction
APFC_BOOT_ADDR in AP configuration scheme, refer to the
Cyclone III Devices
The factory configuration image is user designed and contains soft logic
to:
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■
■
■
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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
Cyclone III device
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
chapter in the
Cyclone III Device
Altera Corporation-Preliminary
Handbook.
Configuring
March 2007