altera remote update reference design

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AN-603-1.1

AN 603: Active Serial Remote System

Upgrade Reference Design

This application note provides a reference design for the active serial (AS) remote

system upgrade feature in Arria



II GX, Stratix



III, and Stratix IV devices. The AS

remote system upgrade feature enables supported Altera



devices to receive new

configuration data from a remote source, update of the flash memory content, and

reconfigure the device with new configuration data, allowing you to overcome

difficult challenges such as shorten design cycles, evolving standards, and system

deployments in remote locations.

This reference design instantiates the ALTREMOTE_UPDATE megafunction and a

user logic to initiate the reconfiguration cycle. Use this reference design to begin using

the remote system upgrade feature in ArriaIIGX, StratixIII, and StratixIV devices

and then you can modify the design to suit your system usage.

This application note contains the following sections:

■ “Remote Update Mode” on page 2

■ “Functional Description” on page 3

■ “Factory Configuration Image User Logic State Machine” on page 10

■ “Application Configuration Image User Logic State Machine” on page 16

■ “Remote System Upgrade Reconfiguration” on page 19

■ “AS Remote System Upgrade Testing Procedure” on page 23

1 This reference design is targeted for Arria II GX devices. Because the remote system

upgrade circuitry for Stratix III and Stratix IV devices are identical to the Arria II GX

devices, this reference design is also applicable for these devices.

f For more information about the AS mode and remote system upgrade feature for

Arria II GX, Stratix III, and Stratix IV devices, refer to the following chapters:

■ Configuration, Design Security, and Remote System Upgrades in Arria II GX Devices

chapter in volume 1 of the Arria II GX Device Handbook.

■ Remote System Upgrades with Stratix III Devices chapter in volume 1 of the Stratix III

Device Handbook.

■ Configuration, Design Security, and Remote System Upgrades in Stratix IV Devices

chapter in volume 1 of the Stratix IV Device Handbook.

Page 2 Remote Update Mode

AN 603: Active Serial Remote System Upgrade Reference Design © August 2013 Altera Corporation

Remote Update Mode

When the device is first powered up in remote update mode, it loads the factory

configuration located at page zero (page registers PGM[23..0] = 24’h000000). You

must always store the factory configuration image for your system at page address

zero. This corresponds to the start address of 0×000000 in the serial configuration

device (EPCS).

After power up or a configuration error, the factory configuration logic automatically

loads. The user-defined factory configuration determines which application

configuration to load before triggering a reconfiguration cycle. The factory

configuration also must specify whether to enable the user watchdog timer for the

application configuration and, if enabled, to include the timer setting information as

well.

Figure 1 shows the transition between the factory and application configuration

image in remote update mode.

If an error occurs when the application configuration image is loading, the dedicated

remote upgrade circuitry of your device updates the remote system upgrade status

upgrade status register to be written:

■ nSTATUS is driven low

■ Internal configuration cyclical redundancy check (CRC) error

■ Configuration reset from the logic array (core nCONFIG)

■ External nCONFIG assertion

■ User watchdog timer time out

After an error, the system reverts back to the factory configuration image. You can

read the remote upgrade status register to determine the reconfiguration source and

determine your next course of action.

Figure 1. Transition Between Configurations in Remote Update Mode

Factory

Configuration

Application 1

Configuration

Application and

Configuration

Set Control Register

and Reconfigure

Configuration Error

Set Control Register

and Reconfigure

Configuration Error

Reload a Different Application

Power Up

Configuration

Error

Functional Description Page 3

When the device successfully loads the application configuration image, the soft logic

in the application configuration image determines when the remote system update is

arriving. When a remote system update arrives, the soft logic receives the incoming

data, writes it to the memory configuration devices, and triggers the system to load

the factory configuration image. The factory configuration image reads the remote

system upgrade status register, determines the valid application configuration image

to load, writes the remote system upgrade control register, and initiates system

reconfiguration.

Functional Description

This section describes the separate logic blocks instantiated in the reference design.

Figure 2 shows the remote system upgrade reference design block diagram.

User Logic Control Block

In the remote system upgrade application, user logic is user-defined. The user logic in

this reference design performs the following actions:

■ Reads from the ALTREMOTE_UPDATE megafunction to determine the source of

reconfiguration and reports the status accordingly. The factory configuration

image user logic in this reference design reports the source of reconfiguration

induced by a watchdog timer timed-out error, external nCONFIG assertion, core

nCONFIG assertion, configuration CRC error, nSTATUS error, or invalid

application configuration image loading errors.

■ Writes to the ALTREMOTE_UPDATE megafunction to set the

application-not-factory (AnF) bit.

■ Determines and writes the next boot address to the ALTREMOTE_UPDATE

megafunction.

Figure 2. AS Remote System Upgrade Reference Design Block Diagram (Note 1)

Note to Figure 2:

(1) This block diagram applies for application configuration image. The image update circuitry is not included in the factory configuration image.

Status Indicator

ALTASMI_PARALLEL

Megafunction

EP2AGX125

User Logic

Control Block

Watchdog Timer

Reset Circuitry

Image Update

Circuitry

New image

ALTREMOTE_UPDATE

Megafunction

(Remote Upgrade

Circuitry)

EPCS128

Factory Image

Starting address:

0×00000

Application Image 1

Starting address:

0×650000

Remote Update

AS Configuration

Page 4 Functional Description

■ Writes to the ALTREMOTE_UPDATE megafunction to enable the watchdog timer

feature in the application configuration image.

■ Writes to the ALTREMOTE_UPDATE megafunction to set the watchdog timer

value for the application configuration image.

■ Triggers the ALTREMOTE_UPDATE megafunction to initiate the reconfiguration.

■ Monitors the pof_error output from the ALTREMOTE_UPDATE megafunction

and determines the next course of action based on the pof_error status.

The following are the functions of the user logic in the application configuration

image:

■ Reads from the ALTREMOTE_UPDATE megafunction to determine the current

status of the watchdog timer feature.

■ Reads from the ALTREMOTE_UPDATE megafunction to determine the value of

the watchdog timer time out.

■ Triggers the ALTREMOTE_UPDATE megafunction to initiate the reconfiguration.

ALTREMOTE_UPDATE Megafunction

The ALTREMOTE_UPDATE megafunction in the Quartus



II software allows you to

take advantage of the remote upgrade circuitry in Arria II GX, Stratix III, and

Stratix IV devices. The ALTREMOTE_UPDATE megafunction simplifies the user

interface of the dedicated remote upgrade circuitry, allowing you to implement the

remote system upgrade feature with the following features:

■ Factory image configuration

■ Application image configuration

■ Watchdog timer

f For more information about the ALTREMOTE_UPDATE megafunction, refer to the

Remote Update Circuitry (ALTREMOTE_UPDATE) Megafunction User Guide.

The Enable Reconfig POF Checking Option

For Arria II GX, Stratix III, and Stratix IV devices, the ALTREMOTE_UPDATE

megafunction includes a reconfiguration programmer object file (.pof) checking

feature. To ensure a robust remote system upgrade operation, Altera recommends

enabling this feature in the factory configuration image. You can disable the Enable

reconfig POF checking option in the application configuration image.

To enable the Enable reconfig POF checking option from the Quartus II software,

turn on Enable reconfig POF checking in the ALTREMOTE_UPDATE

MegaWizard Plug-In Manager dialog box (Figure 3).

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