Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
8–3
Configuration
May 2013
Altera Corporation
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.
shows a chain of two
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.
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
■
Figure 8–1. Compressed and Uncompressed Configuration Data in the Same Configuration File
nCE
G
N
D
nCEO
Decompression
Controller
Cyclone I
V
De
v
ice
nCE
nCEO
N
ot Connected (
N
.C.)
Cyclone I
V
De
v
ice
Serial Configuration
De
v
ice
S
e
r
ial Data
Comp
r
e
ss
ed
U
n
comp
r
e
ss
ed
V
CC
10 k
Ω
Содержание Cyclone IV
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