Stratix II GXB_Reconfig IP

5–1

October 2007 5.Stratix II GX ALT2GXB_RECONFIG Megafunction User Guide Introduction

The MegaWizard ® Plug-In Manager in the Quartus ®II software creates or modifies design files that contain custom megafunction variations. These auto-generated MegaWizard files can then be instantiated in a design file. The MegaWizard Plug-In Manager provides a MegaWizard that allows you to specify options for the ALT2GXB_RECONFIG megafunction. Start the MegaWizard Plug-In Manager using one of the following methods:■Choose the MegaWizard Plug-In Manager command (Tools menu).■When working in the Block Editor (schematic symbol), click MegaWizard Plug-In Manager in the Symbol dialog box (Edit menu > Insert Symbol).■Start the stand-alone version of the MegaWizard Plug-In Manager by typing the following command at the command prompt: qmegawiz .Dynamic

Reconfiguration

This section provides descriptions of the options available on the individual pages of the ALT2GXB_RECONFIG MegaWizard Plug-In Manager.1The MegaWizard Plug-In Manager provides a warning if any of the settings you choose are illegal. Figure 5–1 shows the first page of the MegaWizard Plug-In Manager. To generate an ALT2GXB_RECONFIG custom megafunction variation, select Create a new custom megafunction variation . Click Next .Figure 5–1.

MegaWizard Plug-In Manager (Page 1)SIIGX52006-1.4

5–2

Altera Corporation Stratix II GX Device Handbook, Volume 2October 2007Dynamic Reconfiguration

Figure 5–2 shows the second page of the MegaWizard Plug-In Manager.

Select the following options (click Next when you are done):

■

ALT2GXB_RECONFIG megafunction option, under the I/O folder.■

Stratix II GX as the device family.■

Your desired type of output file format (Verilog , VHDL , or AHDL ).■Your desired file name.

1

For the design to compile successfully, you must enable the

dynamic reconfiguration controller in the alt2gxb instance.Figure 5–2.

MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Page 2)

Altera Corporation

5–3October 2007Stratix II GX Device Handbook, Volume 2

Stratix II GX ALT2GXB_RECONFIG Megafunction User Guide

Figure 5–3 shows page 3 of the ALT2GXB_RECONFIG MegaWizard

Plug-In Manager. From the drop-down menu, select the number of

channels controlled by the reconfig controller. Check off the reconfig

controller features that you would like to activate; for example, Analog

controls, Channel Reconfiguration, change the local divider values of the transmitter or Channel and TX PLL reconfiguration.

Figure 5–3.MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Reconfiguration Settings)

Table 5–1 describes the available options on page 3 of the MegaWizard

Plug-In Manager for your ALT2GXB_RECONFIG custom megafunction

variation. Select the Match project/default option if you want to change

the device Currently selected device family options.

Make your selections on Page 3 and click Next

.

5–4

Altera Corporation Stratix II GX Device Handbook, Volume 2October 2007Dynamic Reconfiguration Table 5–1.MegaWizard Plug-In Manager Options (Page 3) (Part 1 of 2)

ALT2GXB_RECONFIG Setting Description Reference What is the number of channels controlled by the reconfig

controller?Depending on this setting, ALT2GXB_RECONFIG generates the required signal width for the interface signal (RECONFIG_FROMGXB) to alt2gxb and also gives the necessary bus width for all the

selected physical media attachment (PMA) signals. For this setting, Altera ® recommends that if there

are multiple controllers for multiple instances of

alt2gxb , then the setting is same as the number

of channels set in the alt2gxb instance. If a single

controller controls multiple instances of alt2gxb ,

the setting is rounded up to the multiple of the

nearest transceiver (for the number of transceivers

needed to fit the channels selected for that

instance). Depending on the number of channels

set, the resource estimate changes because this is

a soft implementation that uses fabric logic

resources. The resource estimate is shown in the

bottom left of page 3 of the MegaWizard.

Stratix II GX Dynamic

Reconfiguration chapter in volume 2 of

the Stratix II GX Device Handbook .

Altera Corporation

5–5October 2007Stratix II GX Device Handbook, Volume 2

Stratix II GX ALT2GXB_RECONFIG Megafunction User Guide What are the features to be

reconfigured by the reconfig

controller?Three available selections are:Analog Controls – Allows dynamic reconfiguration of PMA settings like Equalization, Pre-emphasis,

DC Gain, and V OD

Channel Reconfiguration – Allows dynamic

reconfiguration of the transceiver channel from one

pre-configured functional mode to another

pre-configured functional mode. This includes

switching from one protocol to another, as well as a

data rate switch within BASIC mode. For example,

dynamic reconfiguration from SONET/SDH to GIGE

mode.

Data rate division in TX – Allows dynamic switch

of the CMU local clock divider. Division factors of 1,

2, and 4 are supported. For example, dynamic rate

switching of the transmitter from 4 Gbps to 2 Gbps

to 1 Gbps.

Channel and TX PLL select/reconfig – The

following three features are available under this

option:

●TX PLL reconfiguration – Allows dynamic

reconfiguration of the TX PLL only.

●Channel and TX PLL reconfiguration – Allows

dynamic reconfiguration of the transceiver

channel from one protocol mode to another and

allows reconfiguration of the TX PLL.

●Channel reconfiguration with TX PLL select –

Allows dynamic reconfiguration of the

transceiver channel and allows selecting one of

the two TX PLLs that the channel can listen to.

●Enable Adaptive Equalization Control – This

feature is currently not supported.Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook .

Table 5–1.MegaWizard Plug-In Manager Options (Page 3) (Part 2 of 2)ALT2GXB_RECONFIG Setting

Description Reference

5–6

Altera Corporation Stratix II GX Device Handbook, Volume 2October 2007Dynamic Reconfiguration

Figure 5–4 shows page 4 of the ALT2GXB_RECONFIG MegaWizard Plug-In Manager. Page 4 appears only if Analog Controls is selected in the "What are the features to be reconfigured by the reconfig

controller?" setting on page 3.

Figure 5–4.MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Analog Controls)

Table 5–2 describes the available options on page 4 of the MegaWizard Plug-In Manager for your ALT2GXB_RECONFIG custom megafunction variation.

Make your selections on page 4 and click Next

.

Table5–2.MegaWizard Plug-In Manager Options (Page 4) (Part 1 of2)

ALT2GXB_RECONFIG Setting Description Reference

Use the same control signal for all channels (grayed out in Figure5–4)In Figure5–4, this option is grayed out because it

is not applicable for a one-channel instance. If the

number of channels controlled by the controller is

more than one, this setting is enabled. The

setting is checked if the design needs the same

control signal written into all channels

simultaneously. If the design requires the control

signal to write in and read out of individual

channels, then the setting is not checked.

Dynamic Reconfiguration

Setup in the MegaWizard

Plug-In Manager section

in the Stratix II GX

Dynamic Reconfiguration

chapter in volume 2 of the

Stratix II GX Device

Handbook.Write Control PMA write control signals are as follows:

●Voltage Output Differential (V OD) – 3 bits per

channel

●Pre-emphasis control pre-tap – 4 bits per

channel

●Pre-emphasis control 1st post-tap – 4 bits per

channel

●Pre-emphasis control 2nd post-tap – 4 bits

per channel

●Equalizer control – 4 bits per channel

●Equalizer DC gain – 2 bits per channel

These are optional signals. The signal widths are

based on the setting you entered for the “What is

the number of channels controlled by the

controller?” option. At least one write signal must

be enabled to configure and use the dynamic

reconfiguration controller. Channels and PMA Controls Reconfiguration section of the

Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.

Read Control PMA read control signals are:

●Voltage Output Differential (V OD)

●Pre-emphasis control pre-tap – 4 bits per

channel

●Pre-emphasis control 1st post-tap – 4 bits per

channel

●Pre-emphasis control 2nd post-tap – 4 bits

per channel

●Equalizer control – 4 bits per channel

●Equalizer DC gain – 2 bits per channel

These are optional signals. The signal widths are

based on the setting you entered for the “What is

the number of channels controlled by the

controller?” option. The read out option is

enabled for selection if the corresponding write

control is selected. The read out option enable is

not independent of write control. Read and write

cannot be performed simultaneously into these

PMA read control signals and PMA write control

signals.Channels and PMA Controls Reconfiguration section of the

Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.

Table5–2.MegaWizard Plug-In Manager Options (Page 4) (Part 2 of2)

ALT2GXB_RECONFIG Setting Description ReferenceFigure5–5 shows page 5 of the ALT2GXB_RECONFIG MegaWizard

Plug-In Manager. Page 5 appears only if Channel Reconfiguration is

selected in the "What are the features to be reconfigured by the reconfig

controller?" setting on page 3.

Figure5–5.MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Channel and TX PLL Reconfiguration)

Table5–3 describes the available options on page 5 of the MegaWizard

Plug-In Manager for your ALT2GXB_RECONFIG custom megafunction

variation.

Make your signal selection on page 5 and click Next.Table5–3.MegaWizard Plug-In Manager Options (Page 5) (Part 1 of2)

ALT2GXB_RECONFIG Setting Description Reference

Use reconfig_address_out The value on this optional port indicates the

address associated with the words (reconfig

instructions) in the .mif.

Each dynamic configuration feature requires a

maximum of 28 or 38 addresses. For example, if

the Channel Reconfiguration feature is selected,

the dynamic reconfiguration controller

automatically increments the address from 0 to

27. If the Channel and TX PLL Reconfiguration

feature is selected, the address is incremented

from 0 to 37. Therefore, the width of the

reconfig_address_out is set to either 5-bits

or 6-bits wide, depending on the feature

selected. The dynamic reconfiguration controller

automatically increments the address at the end

of each write cycle.Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.

Use reconfig_address_en When high, this optional output status signal

indicates that the address to be used in the write

cycle has changed. This signal gets asserted

when the write transaction is completed (busy

signal de-asserted). Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.

Use reset_reconfig_address When asserted, this optional control signal

resets the current reconfiguration address to 0. Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.Use logical_tx_pll_sel This is an optional control signal. The

functionality of the signal depends on the feature

selected, as shown below:

●TX PLL reconfiguration – The corresponding

TX PLL is reconfigured based on the value

on this signal.

●Channel and TX PLL reconfiguration – The

corresponding TX PLL is reconfigured based

on the value on this signal. The transceiver

channel listens to the TX PLL selected by

this signal.

●Channel reconfiguration with TX PLL select -

The transceiver channel listens to the

TX PLL selected by this signal.Channel and CMU PLL Reconfiguration section in the

Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.

Use logical_tx_pll_sel_en This is an optional control signal. When this

signal is enabled in the ALT2GXB_Reconfig

Megawizard, the value set on the

logical_tx_pll_sel signal is valid only if

the logical_tx_pll_sel_en is set to 1.

For more information, refer to the “Logical

TX PLL Select” section in the Stratix II GX

Dynamic Reconfiguration chapter in volume 2 of

the Stratix II GX Device Handbook.Channel and CMU PLL Reconfiguration section in the

Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook.

Table5–3.MegaWizard Plug-In Manager Options (Page 5) (Part 2 of2)

ALT2GXB_RECONFIG Setting Description ReferenceFigure5–6 shows page 6 of the ALT2GXB_RECONFIG MegaWizard

Plug-In Manager. Page 6 appears only if the Data rate division in TX is

selected in the "What are the features to be reconfigured by the reconfig

controller?" setting on page3.

Figure5–6.MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Error Checks/Data Rate Switch)

Table5–4 describes the available options on page 6 of the MegaWizard

Plug-In Manager for your ALT2GXB_RECONFIG custom megafunction

variation.

Make your selections on page 6 and click Next.

Stratix II GX ALT2GXB_RECONFIG Megafunction User Guide

Figure 5–7 shows page 7 (the Simulation Libraries page) of the MegaWizard Plug-In Manager for the Dynamic Reconfiguration selection. Click Next .

Table 5–4.MegaWizard Plug-In Manager Options (Page 6) ALT2GXB_RECONFIG Setting

Description

Reference

Enable illegal mode checking

When this option is selected, the

ALT2GXB_RECONFIG MegaWizard provides the error output port. The dynamic reconfiguration controller checks for specific unsupported options within 2 reconfig_clk cycles, de-asserts the busy signal and asserts the error output port for 2 reconfig_clk cycles. The dynamic

reconfiguration controller does not execute the unsupported operation.

Stratix II GX Dynamic Reconfiguration

chapter in volume 2 of the Stratix II GX Device Handbook .

Enable self recovery

When this option is selected, the

ALT2GXB_RECONFIG MegaWizard provides the error output port. The dynamic reconfiguration controller quits an operation if it did not complete within the expected number of clock cycles. After recovering from the illegal operation, the dynamic reconfiguration controller de-asserts the busy signal and asserts the error output port for 2 reconfig_clk cycles.

Stratix II GX Dynamic Reconfiguration

chapter in volume 2 of the Stratix II GX Device Handbook .

Use the rate_switch_out

P ort to read out the current data rate division values. This optional output status port reads out the

current setting on the CMU local divider.

00 — Division of 1

01 — Division of 210 — Division of 4

11 — illegal value (do not use this value)

Stratix II GX Dynamic

Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook .

Dynamic Reconfiguration

Figure 5–7.MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Simulation Libraries)

Table 5–5 describes the available option on page 7 of the MegaWizard Plug-In Manager for your ALT2GXB_RECONFIG custom megafunction variation.

Make your selections on page 7 and click Next

Table 5–5.MegaWizard Plug-In Manager Options (Page 7) ALT2GXB_RECONFIG Setting

Description

Generate a netlist for synthesis area and timing estimation

Selecting this option generates a netlist file that third party synthesis tools can use to estimate the timing and resource usage

Stratix II GX ALT2GXB_RECONFIG Megafunction User Guide

Figure 5–8 shows page 8 (the last page) of the MegaWizard Plug-In

Manager for the Dynamic Reconfiguration protocol set up. You can select optional files on this page. After you make your selections, click Finish to generate the files.

Figure 5–8.MegaWizard Plug-In Manager - ALT2GXB_RECONFIG (Summary)

Referenced Document

This chapter references the following document:

■

Stratix II GX Dynamic Reconfiguration chapter in volume 2 of the Stratix II GX Device Handbook

Document

Revision History

Table5–6 shows the revision history for this chapter.

Table5–6.Document Revision History

Date and

Document

Version

Changes Made Summary of Changes

October 2007 v1.4 Updated T able5–4.—Updated all the figures in this chapter.—Added “Referenced Document” section. —

August 2007 v1.3Updated Figures5–2 through 5–8.—Updated T ables5–1 through 5–4.—Added Table5–5.—Formerly chapter 4. The chapter number

changed due to the addition of the

Stratix II GX Dynamic Reconfiguration

chapter.

—

February 2007 v1.2Modified “Introduction”.Removed one sentence. Added the “Document Revision History”

section to this chapter.

—

Changed alt2gxb_reconfig to

ALT2GXB_RECONFIG throughout.

Per new style guide convention.

Added more information describing

Figures5–2 and 5–3.

—

Updated “Use reconfig_address_out”

section of Table5–3.

—

Updated “Use the rate_switch_out port

to read out the current data rate division

value” section of T able5–4.

—

Added “Click Next” instructions after each

step.

—

April 2006, v1.1Updated all the MegaWizard Plug-In

Manager figures to match the Quartus II

software GUI.

—

February 2006, v1.0Added chapter to the Stratix II GX Device

Handbook.

—