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
Tab le 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)
AS Serial Configuration Device vv
AP Supported Flash Memory
(2)
— v
PS
External Host with Flash Memory vv
(3)
Download Cable v —
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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