EP4CE40 datasheet(233/488 Pages) ALTERA

233 / 488 page

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices

8–69

Remote System Upgrade

May 2013

Altera Corporation

Cyclone IV Device Handbook,

Volume 1

Remote System Upgrade

Cyclone IV devices support remote system upgrade in AS and AP configuration

schemes. You can also implement remote system upgrade with advanced Cyclone IV

features such as real-time decompression of configuration data in the AS

configuration scheme.

1 Remote system upgrade is not supported in a multi-device configuration chain for

any configuration scheme.

Functional Description

The dedicated remote system upgrade circuitry in Cyclone IV devices manages

remote configuration and provides error detection, recovery, and status information.

A Nios® II processor or a user logic implemented in the Cyclone IV device logic array

provides access to the remote configuration data source and an interface to the

configuration memory.

1 Configuration memory refers to serial configuration devices (EPCS) or supported

parallel flash memory, depending on the configuration scheme that is used.

The remote system upgrade process of the Cyclone IV device consists of the following

steps:

1. A Nios II processor (or user logic) implemented in the Cyclone IV device logic

array receives new configuration data from a remote location. The connection to

the remote source is a communication protocol, such as the transmission control

protocol/Internet protocol (TCP/IP), peripheral component interconnect (PCI),

user datagram protocol (UDP), universal asynchronous receiver/transmitter

(UART), or a proprietary interface.

2. The Nios II processor (or user logic) writes this new configuration data into a

configuration memory.

3. The Nios II processor (or user logic) starts a reconfiguration cycle with the new or

updated configuration data.

4. The dedicated remote system upgrade circuitry detects and recovers from any

error that might occur during or after the reconfiguration cycle and provides error

status information to the user design.

Figure 8–30 shows the steps required for performing remote configuration updates

(the numbers in Figure 8–30 coincide with steps 1–3).

Figure 8–30. Functional Diagram of Cyclone IV Device Remote System Upgrade

Development

Location

Device Configuration

Cyclone IV

Device

Control Module

Data

Configuration

Memory

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