EP4CE55F23C8 Altera, EP4CE55F23C8 Datasheet - Page 180

• Manufacturer Part Number: EP4CE55F23C8
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

8–14
Cyclone IV Device Handbook, Volume 1
1
1
1
The nSTATUS and CONF_DONE pins on all target devices are connected together with
external pull-up resistors, as shown in
open-drain bidirectional pins on the devices. When the first device asserts nCEO (after
receiving all its configuration data), it releases its CONF_DONE pin. However, the
subsequent devices in the chain keep this shared CONF_DONE line low until they
receive their configuration data. When all target devices in the chain receive their
configuration data and release CONF_DONE, the pull-up resistor drives a high level on
CONF_DONE line and all devices simultaneously enter initialization mode.
Although you can cascade Cyclone IV devices, serial configuration devices cannot be
cascaded or chained together.
If the configuration bitstream size exceeds the capacity of a serial configuration
device, you must select a larger configuration device, enable the compression feature,
or both. When configuring multiple devices, the size of the bitstream is the sum of the
individual device’s configuration bitstream.
Configuring Multiple Cyclone IV Devices with the Same Design
Certain designs require that you configure multiple Cyclone IV devices with the same
design through a configuration bitstream, or a .sof. You can do this through the
following methods:
■
■
For both methods, the serial configuration devices cannot be cascaded or chained
together.
Multiple SRAM Object Files
Two copies of the .sof are stored in the serial configuration device. Use the first copy
to configure the master device of the Cyclone IV device and the second copy to
configure all remaining slave devices concurrently. All slave devices must have the
same density and package. The setup is similar to
To configure four identical Cyclone IV devices with the same .sof, you must set up the
chain similar to the example shown in
and its MSEL pins must be set to select AS configuration. The other three slave devices
are set up for concurrent configuration and their MSEL pins must be set to select PS
configuration. The nCEO pin from the master device drives the nCE input pins on all
three slave devices, as well as the DATA and DCLK pins that connect in parallel to all
four devices. During the first configuration cycle, the master device reads its
configuration data from the serial configuration device while holding nCEO high.
After completing its configuration cycle, the master device drives nCE low and sends
the second copy of the configuration data to all three slave devices, configuring them
simultaneously.
The advantage of the setup in
master device. However, all the slave devices must be configured with the same .sof.
You can either compress or uncompress the .sof in this configuration method.
You can still use this method if the master and slave devices use the same .sof.
Multiple .sof
Single .sof
Chapter 8: Configuration and Remote System Upgrades in Cyclone IV Devices
Figure 8–4
Figure
Figure 8–3 on page
is that you can have a different .sof for the
8–4. The first device is the master device
Figure 8–3 on page
© December 2010 Altera Corporation
8–13. These pins are
8–13.
Configuration