HC4GX15 Datasheet, PDF (480/668 Pages) Altera Corporation – HardCopy IV Device Handbook

2–22
Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Quartus II MegaWizard Plug-In Manager Interfaces to Support Dynamic
■ Multiple dynamic reconfiguration controllers—Your design can have multiple
ALTGX_RECONFIG instances, where every ALTGX instance is controlled by its
own ALTGX_RECONFIG instance.
Figure 2–6 shows a block diagram of multiple ALTGX_RECONFIG instances, each
controlling a single ALTGX instance.
Figure 2–6. Block Diagram of Multiple Dynamic Reconfiguration Controllers in a Design
reconfig_fromgxb [n:0]
ALTGX_RECONFIG Instance 1
reconfig_togxb [3:0]
ALTGX Instance 1
ALTGX_RECONFIG Instance 2
reconfig_fromgxb [n:0]
reconfig_togxb [3:0]
ALTGX Instance 2
To enable dynamic reconfiguration of a transceiver channel, you must understand the
following:
■ Logical Channel Addressing—The dynamic reconfiguration controller identifies a
transceiver channel by using the logical channel address. The What is the starting
channel number? option in the Reconfig screen of the ALTGX MegaWizard
Plug-In Manager allows you to set the logical channel address of all the channels
within the ALTGX instance. This concept is explained in detail in “Logical
Channel Addressing” on page 2–23.
■ Total number of channels controlled by the ALTGX_RECONFIG instance—Every
dynamic reconfiguration controller in a design might be connected to either a
single ALTGX instance or multiple ALTGX instances. Depending on the number of
channels within each of these ALTGX instances, you must set the total number of
channels controlled by the dynamic reconfiguration controller in the
ALTGX_RECONFIG MegaWizard Plug-In Manager. This concept is explained in
“Total Number of Channels Controlled by the ALTGX_RECONFIG Instance” on
page 2–35.
■ Connecting the reconfig_fromgxb and reconfig_togxb ports between the
ALTGX and ALTGX_RECONFIG instances.
HardCopy IV Device Handbook, Volume 3
© June 2009 Altera Corporation