HC4GX15 Datasheet, PDF (591/668 Pages) Altera Corporation – HardCopy IV Device Handbook

Chapter 2: HardCopy IV GX Dynamic Reconfiguration
Design Examples: Dynamic Reconfiguration Controller (ALTGX_RECONFIG)
2–133
The description of the functional blocks is divided into four sections. The topics
described in each section are as follows:
■ Section I—Lists the steps to configure the ALTGX instance to generate the .mif for
GIGE and SONET/SDH OC48 configurations. It also lists the steps to create the
ALTGX_RECONFIG instance.
■ Section II—Sets up the user control logic for the ALTGX_RECONFIG controller.
■ Section III—Explains the logic to process the GIGE and SONET/SDH data. This
logic is required due to the differences in the data interface widths and the
clocking between the two configurations (shown in Table 2–36).
■ Section IV—Explains how to reset the user control logic to control the transceiver
channel and system resets.
Section I—Configure the ALTGX Instance to Generate the .mif
Use the following steps to generate a .mif for GIGE and SONET/SDH OC48
configurations:
1. Set up the ALTGX MegaWizard Plug-In Manager with the desired settings for the
GIGE configuration. Generate the ALTGX instance for the GIGE configuration.
Name this instance “GIGE_GXB”. Table 2–38 explains the various options to set in
the GIGE_GXB instance.
2. Generate the ALTGX_RECONFIG instance to control the GIGE_GXB instance.
3. Create a top-level design only with the GIGE_GXB instance. Enable the Quartus II
settings to generate a .mif. Generate the .mif for the GIGE configuration. Compile
the top-level design. The Quartus II software generates a .mif for the GIGE
configuration. The GIGE_GXB.mif contains the desired GIGE configuration
settings.
4. Modify the ALTGX instance with the desired settings for the SONET/SDH OC48
configuration. Name this instance “SONET_GXB”.
5. Create a top-level design only with the SONET_GXB instance. Enable the
Quartus II settings to generate a .mif. Compile the top-level design. The Quartus II
software generates a .mif for the SONET/SDH OC4 configuration. The
SONET_GXB.mif contains the desired SONET/SDH configuration settings.
6. Initialize two memory elements with the .mif contents and write user logic to
select the appropriate .mif to use with the ALTGX_RECONFIG instance.
Table 2–38 shows the ALTGX instance settings for a single regular transceiver channel
in GIGE configuration.
Table 2–38. Step 1: Generate the ALTGX Instance for the GIGE Configuration (Part 1 of 3)
ALTGX MegaWizard Plug-In
Manager Option
Setting
General Screen
Which protocol will you be using? Set the protocol to GIGE configuration.
option
© June 2009 Altera Corporation
HardCopy IV Device Handbook, Volume 3