EP4CE40 datasheet(166/488 Pages) ALTERA

166 / 488 page

8–2

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

Configuration

Cyclone IV Device Handbook,

May 2013

Altera Corporation

Volume 1

■

“FPP Configuration” on page 8–40

■

“JTAG Configuration” on page 8–45

■

“Device Configuration Pins” on page 8–62

Configuration Features

Table 8–1 lists the configuration methods you can use in each configuration scheme.

Configuration Data Decompression

Cyclone IV devices support configuration data decompression, which saves

configuration memory space and time. This feature allows you to store compressed

configuration data in configuration devices or other memory and send the

compressed bitstream to Cyclone IV devices. During configuration, Cyclone IV

devices decompress the bitstream in real time and program the SRAM cells.

1 Compression may reduce the configuration bitstream size by 35 to 55%.

When you enable compression, the Quartus II software generates configuration files

with compressed configuration data. This compressed file reduces the storage

requirements in the configuration device or flash memory and decreases the time

required to send the bitstream to the Cyclone IV device. The time required by a

Cyclone IV device to decompress a configuration file is less than the time required to

send the configuration data to the device. There are two methods for enabling

compression for the Cyclone IV device bitstreams in the Quartus II software:

■

Before design compilation (through the Compiler Settings menu)

■

After design compilation (through the Convert Programming Files dialog box)

To enable compression in the compiler settings of the project in the Quartus II

software, perform the following steps:

1. On the Assignments menu, click Device. The Settings dialog box appears.

2. Click Device and Pin Options. The Device and Pin Options dialog box appears.

Table 8–1. Configuration Features in Cyclone IV Devices

Configuration Scheme

Configuration Method

Decompression

Remote System Upgrade (1)

Serial Configuration Device

Supported Flash Memory (2)

—

External Host with Flash Memory

v (3)

Download Cable

—

FPP

External Host with Flash Memory

—

v (3)

JTAG based configuration

External Host with Flash Memory

—

Download Cable

—

Notes to Table 8–1:

(1) Remote update mode is supported when you use the Remote System Upgrade feature. You can enable or disable remote update mode with an

option setting in the Quartus® II software.

(2) For more information about the supported device families for the Micron commodity parallel flash, refer to Table 8–10 on page 8–22.

(3) Remote update mode is supported externally using the Parallel Flash Loader (PFL) with the Quartus II software.

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