Configuration Requirement - Altera Cyclone IV Device Handbook

Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Configuration
3. Click the Configuration tab.
4. Turn on Generate compressed bitstreams.
5. Click OK.
6. In the Settings dialog box, click OK.
You can enable compression when creating programming files from the Convert
Programming Files dialog box. To enable compression, perform the following steps:
1. On the File menu, click Convert Programming Files.
2. Under Output programming file, select your desired file type from the
Programming file type list.
3. If you select Programmer Object File (.pof), you must specify the configuration
device in the Configuration device list.
4. Under Input files to convert, select SOF Data.
5. Click Add File to browse to the Cyclone IV device SRAM object files (.sof).
6. In the Convert Programming Files dialog box, select the .pof you added to SOF
Data and click Properties.
7. In the SOF File Properties dialog box, turn on the Compression option.
When multiple Cyclone IV devices are cascaded, you can selectively enable the
compression feature for each device in the chain.
Cyclone IV devices. The first device has compression enabled and receives
compressed bitstream from the configuration device. The second device has the
compression feature disabled and receives uncompressed data. You can generate
programming files for this setup in the Convert Programming Files dialog box.
Figure 8–1. Compressed and Uncompressed Configuration Data in the Same Configuration File

Configuration Requirement

This section describes Cyclone IV device configuration requirement and includes the
following topics:
"Power-On Reset (POR) Circuit" on page 8–4
■
■ "Configuration File Size" on page 8–4
■ "Power Up" on page 8–6
May 2013 Altera Corporation
Compressed
Decompression
10 kΩ
Controller
Cyclone IV
Device
nCE nCEO
GND
Figure 8–1 shows a chain of two
Serial Data
Serial Configuration
Uncompressed
V
CC
Cyclone IV
Device
nCE nCEO Not Connected (N.C.)
8–3
Device
Cyclone IV Device Handbook,
Volume 1