ALTDQ_DQS2 IP Core User Guide

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ID 683742
Date 5/08/2017
Public
Document Table of Contents
Document Table of Contents x
ALTDQ_DQS2 IP Core User Guide
ALTDQ_DQS2 IP Core User Guide x
ALTDQ_DQS2 Features ALTDQ_DQS2 Device Support Resource Utilization and Performance ALTDQ_DQS2 Parameter Settings ALTDQ_DQS2 Data Paths ALTDQ_DQS2 Ports Dynamic Reconfiguration for ALTDQ_DQS2 Stratix V Design Example Arria V Design Example IP-Generate Command ALTDQ_DQS2 IP Core User Guide Archives Document Revision History
ALTDQ_DQS2 Data Paths x
DQ and DQS Input Path DQ and DQS Output Path
DQ and DQS Input Path x
DQ and DQS Input Paths for Stratix V Devices Data Input Path for Arria V, Cyclone V, and Stratix V Devices Blocks in DQ and DQS Data Input Path
Blocks in DQ and DQS Data Input Path x
DQS Logic Capture DDIO to Read FIFO Path FIFO Control
DQ and DQS Output Path x
DQ and DQS Output Path for Stratix V Devices Blocks in DQ and DQS Output Path DQ and DQS Output Path for Arria V and Cyclone V Devices
ALTDQ_DQS2 Ports x
ALTDQ_DQS2 Data Strobe Ports ALTDQ_DQS2 Data Ports ALTDQ_DQS2 Termination Control Ports ALTDQ_DQS2 PLL and DLL Ports ALTDQ_DQS2 Hard FIFO Ports ALTDQ_DQS2 Dynamic Configuration Ports
Dynamic Reconfiguration for ALTDQ_DQS2 x
I/O Configuration Block Bit Sequence for Arria V GZ and Stratix V Devices DQS Configuration Block Bit Sequence for Arria V GZ and Stratix V Devices I/O Configuration Block Bit Sequence for Arria V and Cyclone V Devices DQS Configuration Block Bit Sequence for Arria V and Cyclone V Devices Example Usage of Dynamic Reconfiguration for ALTDQ_DQS2
Stratix V Design Example x
Instantiating ALTDQ_DQS2 IP Core Instantiating the ALTDLL IP Core Instantiating ALT_OCT IP Core Instantiating Altera PLL Setting Up NativeLink and Simulation Settings Understanding Simulation Results—Stratix V Design Example
Instantiating Altera PLL x
Altera PLL Clock Settings Information
Understanding Simulation Results—Stratix V Design Example x
Dynamic Configuration SDC Walkthrough
Dynamic Configuration x
DQS Write Operation Side Read Operation Side Write Operation DQS Read Operation Simulation Results
DQS Read Operation x
DQS Delay Chain Hard Read FIFO
SDC Walkthrough x
Analyzing Same Edge Transfer Constraining Outgoing DQS Strobe
Arria V Design Example x
Instantiating the ALTDQ_DQS2 IP Core Instantiating the ALTDLL IP Core Instantiating ALT_OCT IP Core Instantiating Altera PLL Setting Up NativeLink and Simulation Settings Understanding Simulation Results—Arria V Design Example
Instantiating Altera PLL x
Altera PLL Clock Settings Information
Understanding Simulation Results—Arria V Design Example x
Dynamic Configuration
Dynamic Configuration x
DQS Write Operation Side Read Operation Side Write Operation DQS Read Operation Simulation Results SDC Walkthrough
DQS Read Operation x
DQS Delay Chain VFIFO, LFIFO, and Read FIFO DQS Enable Control
SDC Walkthrough x
Analyzing Same Edge Transfer Constraining Outgoing DQS Strobe Timing Violation tq_analysis.tcl
IP-Generate Command x
Using IP-Generate Command
ALTDQ_DQS2 IP Core User Guide

Dynamic Configuration

At 100 ns, there is a high pulse on the beginscan signal. When the agent_output_enable signal is pulled low, the strobe_io and agent_dqs_in goes to Hi-Z between 110 ns and 8.94 ms time mark, some internal calibration is being carried out. Dynamic configuration is the main feature used. At 8.795 ms time mark, the enable_driver signal is asserted. This specifies that the internal calibration is completed, and the control is passed on to the host controller (the DQS driver) to perform the normal read/write operation.

Note: For RTL related to dynamic configuration operations in this design example, refer to config_controller.sv file.

You can override the static values at runtime with a scan chain using the dynamic configuration feature in the ALTDQ_DQS2 IP core. To help you achieve static timing closure, the dynamic configuration feature allows you to override the static values at runtime with a scan chain. Each I/O and the DQS logic contain its own scan chain block (shift registers). This section shows you how to serially scan configuration bits into each scan chain block, between 100 ns and 8.795 ms time mark.

The following figure shows the waveform for the dynamic configuration simulation generated after executing topwave.do (located in the simulation/modelsim folder), between the high pulses of beginscan and scandone.

Figure 39. Dynamic Configuration Waveform


Because the enable_driver signal is asserted at 8.795 ms time mark, following read and write operations will be executed by DQS driver.

Note: The driver_clk is running at the same rate as the core

Section Content
DQS Write Operation
Side Read Operation
Side Write Operation
DQS Read Operation
Simulation Results
SDC Walkthrough

Related Information
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