EP4CE40 datasheet(235/488 Pages) ALTERA

235 / 488 page

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

8–71

Remote System Upgrade

May 2013

Altera Corporation

Cyclone IV Device Handbook,

Volume 1

Remote System Upgrade Mode

In remote update mode, Cyclone IV devices load the factory configuration image after

power up. The user-defined factory configuration determines the application

configuration to be loaded and triggers a reconfiguration cycle. The factory

configuration can also contain application logic.

When used with configuration memory, the remote update mode allows an

application configuration to start at any flash sector boundary. Additionally, the

remote update mode features a user watchdog timer that can detect functional errors

in an application configuration.

Remote Update Mode

In AS configuration scheme, when a Cyclone IV device is first powered up in remote

update, it loads the factory configuration located at address

boot_address[23:0]

= 24b'0. Altera recommends storing the factory configuration

image for your system at boot address 24b'0, which corresponds to the start address

location 0×000000 in the serial configuration device. A factory configuration image is

a bitstream for the Cyclone IV device 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.

When you use the AP configuration in Cyclone IV E devices, the Cyclone IV E device

loads the default factory configuration located at the following address after device

power-up in remote update mode:

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 APFC_BOOT_ADDR JTAG instruction. 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 0×010000 represented in 16-bit word

addressing (or the updated address if the default address is changed) in the

supported parallel flash memory. For more information about the application of the

APFC_BOOT_ADDR

JTAG instruction in AP configuration scheme, refer to the “JTAG

Instructions” on page 8–57.

The factory configuration image is user-designed and contains soft logic (Nios II

processor or state machine and the remote communication interface) to:

■

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

EP4CE40 Datasheet(PDF) 235 Page - Altera Corporation

EP4CE40 Datasheet(HTML) 235 Page - Altera Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL