EP2AGX95EF29C6N Datasheet, PDF (346/380 Pages) Altera Corporation – Device Interfaces and Integration

9–60
Chapter 9: Configuration, Design Security, and Remote System Upgrades in Arria II Devices
Quartus II Software Support
1 The user watchdog timer is disabled in factory configurations and during the
configuration cycle of the application configuration. It is enabled after the application
configuration enters user mode.
Quartus II Software Support
The Quartus II software provides the flexibility to include the remote system upgrade
interface between the Arria II device logic array and the dedicated circuitry, generates
configuration files for production, and allows remote programming of the system
configuration memory.
Use the ALTREMOTE_UPDATE megafunction option in the Quartus II software as
the interface between the remote system upgrade circuitry and the device logic array
interface. Using the megafunction block instead of creating your own logic saves
design time and offers more efficient logic synthesis and device implementation.
ALTREMOTE_UPDATE Megafunction
The ALTREMOTE_UPDATE megafunction provides a memory-like interface to the
remote system upgrade circuitry and handles the shift register read and write
protocol in the Arria II device logic. This implementation is suitable for designs that
implement the factory configuration functions using a Nios II processor or user logic
in the device.
Figure 9–28 shows the interface signals between the ALTREMOTE_UPDATE
megafunction and Nios II processor or user logic.
Figure 9–28. Interface Signals between the ALTREMOTE_UPDATE Megafunction and the Nios II Processor
ALTREMOTE_UPDATE
Nios II Processor or
User Logic
read_param
write_param
param[2..0]
data_in[23..0]
reconfig
reset_timer
clock
reset
busy
data_out[23..0]
f For more information about the ALTREMOTE_UPDATE megafunction and the
description of ports listed in Figure 9–28, refer to the Remote Update Circuitry
(ALTREMOTE_UPDATE) Megafunction User Guide.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
July 2012 Altera Corporation