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1. Release Information
2. External Memory Interfaces Arria® 10 FPGA IP Introduction
3. Arria® 10 EMIF IP Product Architecture
4. Arria® 10 EMIF IP End-User Signals
5. Arria® 10 EMIF – Simulating Memory IP
6. Arria® 10 EMIF IP for DDR3
7. Arria® 10 EMIF IP for DDR4
8. Arria® 10 EMIF IP for QDR II/II+/II+ Xtreme
9. Arria® 10 EMIF IP for QDR-IV
10. Arria® 10 EMIF IP for RLDRAM 3
11. Arria® 10 EMIF IP for LPDDR3
12. Arria® 10 EMIF IP Timing Closure
13. Optimizing Controller Performance
14. Arria® 10 EMIF IP Debugging
15. External Memory Interfaces Arria® 10 FPGA IP User Guide Archives
16. Document Revision History for External Memory Interfaces Arria® 10 FPGA IP User Guide
3.1. EMIF Architecture: Introduction
3.2. Arria® 10 EMIF Sequencer
3.3. Arria® 10 EMIF Calibration
3.4. Periodic OCT Recalibration
3.5. Arria® 10 EMIF Controller
3.6. Hardware Resource Sharing Among Multiple EMIFs
3.7. Arria® 10 EMIF for Hard Processor Subsystem
3.8. Arria® 10 EMIF Ping Pong PHY
3.9. Arria® 10 EMIF and SmartVID
4.1.1. Intel Arria 10 EMIF IP Interfaces for DDR3
4.1.2. Intel Arria 10 EMIF IP Interfaces for DDR4
4.1.3. Intel Arria 10 EMIF IP Interfaces for LPDDR3
4.1.4. Intel Arria 10 EMIF IP Interfaces for QDR II/II+/II+ Xtreme
4.1.5. Intel Arria 10 EMIF IP Interfaces for QDR-IV
4.1.6. Intel Arria 10 EMIF IP Interfaces for RLDRAM 3
4.1.1.1. pll_ref_clk for DDR3
4.1.1.2. pll_locked for DDR3
4.1.1.3. pll_extra_clk_0 for DDR3
4.1.1.4. pll_extra_clk_1 for DDR3
4.1.1.5. pll_extra_clk_2 for DDR3
4.1.1.6. pll_extra_clk_3 for DDR3
4.1.1.7. oct for DDR3
4.1.1.8. mem for DDR3
4.1.1.9. status for DDR3
4.1.1.10. afi_reset_n for DDR3
4.1.1.11. afi_clk for DDR3
4.1.1.12. afi_half_clk for DDR3
4.1.1.13. afi for DDR3
4.1.1.14. emif_usr_reset_n for DDR3
4.1.1.15. emif_usr_clk for DDR3
4.1.1.16. emif_usr_reset_n_sec for DDR3
4.1.1.17. emif_usr_clk_sec for DDR3
4.1.1.18. cal_debug_reset_n for DDR3
4.1.1.19. cal_debug_clk for DDR3
4.1.1.20. cal_debug_out_reset_n for DDR3
4.1.1.21. cal_debug_out_clk for DDR3
4.1.1.22. clks_sharing_master_out for DDR3
4.1.1.23. clks_sharing_slave_in for DDR3
4.1.1.24. clks_sharing_slave_out for DDR3
4.1.1.25. ctrl_amm for DDR3
4.1.1.26. ctrl_auto_precharge for DDR3
4.1.1.27. ctrl_user_priority for DDR3
4.1.1.28. ctrl_ecc_user_interrupt for DDR3
4.1.1.29. ctrl_ecc_readdataerror for DDR3
4.1.1.30. ctrl_mmr_slave for DDR3
4.1.1.31. hps_emif for DDR3
4.1.1.32. cal_debug for DDR3
4.1.1.33. cal_debug_out for DDR3
4.1.2.1. pll_ref_clk for DDR4
4.1.2.2. pll_locked for DDR4
4.1.2.3. pll_extra_clk_0 for DDR4
4.1.2.4. pll_extra_clk_1 for DDR4
4.1.2.5. pll_extra_clk_2 for DDR4
4.1.2.6. pll_extra_clk_3 for DDR4
4.1.2.7. oct for DDR4
4.1.2.8. mem for DDR4
4.1.2.9. status for DDR4
4.1.2.10. afi_reset_n for DDR4
4.1.2.11. afi_clk for DDR4
4.1.2.12. afi_half_clk for DDR4
4.1.2.13. afi for DDR4
4.1.2.14. emif_usr_reset_n for DDR4
4.1.2.15. emif_usr_clk for DDR4
4.1.2.16. emif_usr_reset_n_sec for DDR4
4.1.2.17. emif_usr_clk_sec for DDR4
4.1.2.18. cal_debug_reset_n for DDR4
4.1.2.19. cal_debug_clk for DDR4
4.1.2.20. cal_debug_out_reset_n for DDR4
4.1.2.21. cal_debug_out_clk for DDR4
4.1.2.22. clks_sharing_master_out for DDR4
4.1.2.23. clks_sharing_slave_in for DDR4
4.1.2.24. clks_sharing_slave_out for DDR4
4.1.2.25. ctrl_amm for DDR4
4.1.2.26. ctrl_auto_precharge for DDR4
4.1.2.27. ctrl_user_priority for DDR4
4.1.2.28. ctrl_ecc_user_interrupt for DDR4
4.1.2.29. ctrl_ecc_readdataerror for DDR4
4.1.2.30. ctrl_mmr_slave for DDR4
4.1.2.31. hps_emif for DDR4
4.1.2.32. cal_debug for DDR4
4.1.2.33. cal_debug_out for DDR4
4.1.3.1. pll_ref_clk for LPDDR3
4.1.3.2. pll_locked for LPDDR3
4.1.3.3. pll_extra_clk_0 for LPDDR3
4.1.3.4. pll_extra_clk_1 for LPDDR3
4.1.3.5. pll_extra_clk_2 for LPDDR3
4.1.3.6. pll_extra_clk_3 for LPDDR3
4.1.3.7. oct for LPDDR3
4.1.3.8. mem for LPDDR3
4.1.3.9. status for LPDDR3
4.1.3.10. afi_reset_n for LPDDR3
4.1.3.11. afi_clk for LPDDR3
4.1.3.12. afi_half_clk for LPDDR3
4.1.3.13. afi for LPDDR3
4.1.3.14. emif_usr_reset_n for LPDDR3
4.1.3.15. emif_usr_clk for LPDDR3
4.1.3.16. cal_debug_reset_n for LPDDR3
4.1.3.17. cal_debug_clk for LPDDR3
4.1.3.18. cal_debug_out_reset_n for LPDDR3
4.1.3.19. cal_debug_out_clk for LPDDR3
4.1.3.20. clks_sharing_master_out for LPDDR3
4.1.3.21. clks_sharing_slave_in for LPDDR3
4.1.3.22. clks_sharing_slave_out for LPDDR3
4.1.3.23. ctrl_user_priority for LPDDR3
4.1.3.24. ctrl_mmr_slave for LPDDR3
4.1.3.25. cal_debug for LPDDR3
4.1.3.26. cal_debug_out for LPDDR3
4.1.4.1. pll_ref_clk for QDR II/II+/II+ Xtreme
4.1.4.2. pll_locked for QDR II/II+/II+ Xtreme
4.1.4.3. pll_extra_clk_0 for QDR II/II+/II+ Xtreme
4.1.4.4. pll_extra_clk_1 for QDR II/II+/II+ Xtreme
4.1.4.5. pll_extra_clk_2 for QDR II/II+/II+ Xtreme
4.1.4.6. pll_extra_clk_3 for QDR II/II+/II+ Xtreme
4.1.4.7. oct for QDR II/II+/II+ Xtreme
4.1.4.8. mem for QDR II/II+/II+ Xtreme
4.1.4.9. status for QDR II/II+/II+ Xtreme
4.1.4.10. emif_usr_reset_n for QDR II/II+/II+ Xtreme
4.1.4.11. emif_usr_clk for QDR II/II+/II+ Xtreme
4.1.4.12. cal_debug_reset_n for QDR II/II+/II+ Xtreme
4.1.4.13. cal_debug_clk for QDR II/II+/II+ Xtreme
4.1.4.14. cal_debug_out_reset_n for QDR II/II+/II+ Xtreme
4.1.4.15. cal_debug_out_clk for QDR II/II+/II+ Xtreme
4.1.4.16. clks_sharing_master_out for QDR II/II+/II+ Xtreme
4.1.4.17. clks_sharing_slave_in for QDR II/II+/II+ Xtreme
4.1.4.18. clks_sharing_slave_out for QDR II/II+/II+ Xtreme
4.1.4.19. ctrl_amm for QDR II/II+/II+ Xtreme
4.1.4.20. cal_debug for QDR II/II+/II+ Xtreme
4.1.4.21. cal_debug_out for QDR II/II+/II+ Xtreme
4.1.5.1. pll_ref_clk for QDR-IV
4.1.5.2. pll_locked for QDR-IV
4.1.5.3. pll_extra_clk_0 for QDR-IV
4.1.5.4. pll_extra_clk_1 for QDR-IV
4.1.5.5. pll_extra_clk_2 for QDR-IV
4.1.5.6. pll_extra_clk_3 for QDR-IV
4.1.5.7. oct for QDR-IV
4.1.5.8. mem for QDR-IV
4.1.5.9. status for QDR-IV
4.1.5.10. afi_reset_n for QDR-IV
4.1.5.11. afi_clk for QDR-IV
4.1.5.12. afi_half_clk for QDR-IV
4.1.5.13. afi for QDR-IV
4.1.5.14. emif_usr_reset_n for QDR-IV
4.1.5.15. emif_usr_clk for QDR-IV
4.1.5.16. cal_debug_reset_n for QDR-IV
4.1.5.17. cal_debug_clk for QDR-IV
4.1.5.18. cal_debug_out_reset_n for QDR-IV
4.1.5.19. cal_debug_out_clk for QDR-IV
4.1.5.20. clks_sharing_master_out for QDR-IV
4.1.5.21. clks_sharing_slave_in for QDR-IV
4.1.5.22. clks_sharing_slave_out for QDR-IV
4.1.5.23. ctrl_amm for QDR-IV
4.1.5.24. cal_debug for QDR-IV
4.1.5.25. cal_debug_out for QDR-IV
4.1.6.1. pll_ref_clk for RLDRAM 3
4.1.6.2. pll_locked for RLDRAM 3
4.1.6.3. pll_extra_clk_0 for RLDRAM 3
4.1.6.4. pll_extra_clk_1 for RLDRAM 3
4.1.6.5. pll_extra_clk_2 for RLDRAM 3
4.1.6.6. pll_extra_clk_3 for RLDRAM 3
4.1.6.7. oct for RLDRAM 3
4.1.6.8. mem for RLDRAM 3
4.1.6.9. status for RLDRAM 3
4.1.6.10. afi_reset_n for RLDRAM 3
4.1.6.11. afi_clk for RLDRAM 3
4.1.6.12. afi_half_clk for RLDRAM 3
4.1.6.13. afi for RLDRAM 3
4.1.6.14. cal_debug_reset_n for RLDRAM 3
4.1.6.15. cal_debug_clk for RLDRAM 3
4.1.6.16. cal_debug_out_reset_n for RLDRAM 3
4.1.6.17. cal_debug_out_clk for RLDRAM 3
4.1.6.18. clks_sharing_master_out for RLDRAM 3
4.1.6.19. clks_sharing_slave_in for RLDRAM 3
4.1.6.20. clks_sharing_slave_out for RLDRAM 3
4.1.6.21. cal_debug for RLDRAM 3
4.1.6.22. cal_debug_out for RLDRAM 3
4.4.1. ctrlcfg0
4.4.2. ctrlcfg1
4.4.3. dramtiming0
4.4.4. sbcfg1
4.4.5. caltiming0
4.4.6. caltiming1
4.4.7. caltiming2
4.4.8. caltiming3
4.4.9. caltiming4
4.4.10. caltiming9
4.4.11. dramaddrw
4.4.12. sideband0
4.4.13. sideband1
4.4.14. sideband2
4.4.15. sideband3
4.4.16. sideband4
4.4.17. sideband5
4.4.18. sideband6
4.4.19. sideband7
4.4.20. sideband8
4.4.21. sideband9
4.4.22. sideband10
4.4.23. sideband11
4.4.24. sideband12
4.4.25. sideband13
4.4.26. dramsts
4.4.27. niosreserve0
4.4.28. niosreserve1
4.4.29. ecc3: ECC Error and Interrupt Configuration
4.4.30. ecc4: Status and Error Information
4.4.31. ecc5: Address of Most Recent SBE/DBE
4.4.32. ecc6: Address of Most Recent Correction Command Dropped
6.1.1. Intel Arria 10 EMIF IP DDR3 Parameters: General
6.1.2. Intel Arria 10 EMIF IP DDR3 Parameters: Memory
6.1.3. Intel Arria 10 EMIF IP DDR3 Parameters: Mem I/O
6.1.4. Intel Arria 10 EMIF IP DDR3 Parameters: FPGA I/O
6.1.5. Intel Arria 10 EMIF IP DDR3 Parameters: Mem Timing
6.1.6. Intel Arria 10 EMIF IP DDR3 Parameters: Board
6.1.7. Intel Arria 10 EMIF IP DDR3 Parameters: Controller
6.1.8. Intel Arria 10 EMIF IP DDR3 Parameters: Diagnostics
6.1.9. Intel Arria 10 EMIF IP DDR3 Parameters: Example Designs
7.1.1. Intel Arria 10 EMIF IP DDR4 Parameters: General
7.1.2. Intel Arria 10 EMIF IP DDR4 Parameters: Memory
7.1.3. Intel Arria 10 EMIF IP DDR4 Parameters: Mem I/O
7.1.4. Intel Arria 10 EMIF IP DDR4 Parameters: FPGA I/O
7.1.5. Intel Arria 10 EMIF IP DDR4 Parameters: Mem Timing
7.1.6. Intel Arria 10 EMIF IP DDR4 Parameters: Board
7.1.7. Intel Arria 10 EMIF IP DDR4 Parameters: Controller
7.1.8. Intel Arria 10 EMIF IP DDR4 Parameters: Diagnostics
7.1.9. Intel Arria 10 EMIF IP DDR4 Parameters: Example Designs
7.4.4.1. General Layout Guidelines
7.4.4.2. Layout Guidelines
7.4.4.3. Length Matching Rules
7.4.4.4. Spacing Guidelines
7.4.4.5. Layout Guidelines for DDR3 and DDR4 SDRAM Wide Interface (>72 bits)
7.4.4.6. Fly-By Network Design for Clock, Command, and Address Signals
7.4.4.7. Additional Layout Guidelines for DDR4 Twin-die Devices
8.1.1. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: General
8.1.2. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: Memory
8.1.3. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: FPGA I/O
8.1.4. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: Mem Timing
8.1.5. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: Board
8.1.6. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: Controller
8.1.7. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: Diagnostics
8.1.8. Intel Arria 10 EMIF IP QDR II/II+/II+ Xtreme Parameters: Example Designs
8.3.1.6.1. General Guidelines
8.3.1.6.2. QDR II, QDR II+ and QDR II+ Xtreme SRAM Command Signals
8.3.1.6.3. QDR II, QDR II+ and QDR II+ Xtreme SRAM Address Signals
8.3.1.6.4. QDR II, QDR II+, and QDR II+ Xtreme SRAM Clock Signals
8.3.1.6.5. QDR II, QDR II+ and QDR II+ Xtreme SRAM Data, BWS, and QVLD Signals
8.3.1.6.6. Resource Sharing Guidelines (Multiple Interfaces)
9.1.1. Intel Arria 10 EMIF IP QDR-IV Parameters: General
9.1.2. Intel Arria 10 EMIF IP QDR-IV Parameters: Memory
9.1.3. Intel Arria 10 EMIF IP QDR-IV Parameters: FPGA I/O
9.1.4. Intel Arria 10 EMIF IP QDR-IV Parameters: Mem Timing
9.1.5. Intel Arria 10 EMIF IP QDR-IV Parameters: Board
9.1.6. Intel Arria 10 EMIF IP QDR-IV Parameters: Controller
9.1.7. Intel Arria 10 EMIF IP QDR-IV Parameters: Diagnostics
9.1.8. Intel Arria 10 EMIF IP QDR-IV Parameters: Example Designs
10.1.1. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: General
10.1.2. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: Memory
10.1.3. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: FPGA I/O
10.1.4. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: Mem Timing
10.1.5. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: Board
10.1.6. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: Controller
10.1.7. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: Diagnostics
10.1.8. Intel Arria 10 EMIF IP RLDRAM 3 Parameters: Example Designs
11.1.1. Intel Arria 10 EMIF IP LPDDR3 Parameters: General
11.1.2. Intel Arria 10 EMIF IP LPDDR3 Parameters: Memory
11.1.3. Intel Arria 10 EMIF IP LPDDR3 Parameters: Mem I/O
11.1.4. Intel Arria 10 EMIF IP LPDDR3 Parameters: FPGA I/O
11.1.5. Intel Arria 10 EMIF IP LPDDR3 Parameters: Mem Timing
11.1.6. Intel Arria 10 EMIF IP LPDDR3 Parameters: Board
11.1.7. Intel Arria 10 EMIF IP LPDDR3 Parameters: Controller
11.1.8. Intel Arria 10 EMIF IP LPDDR3 Parameters: Diagnostics
11.1.9. Intel Arria 10 EMIF IP LPDDR3 Parameters: Example Designs
13.4.1. Auto-Precharge Commands
13.4.2. Latency
13.4.3. Calibration
13.4.4. Bank Interleaving
13.4.5. Additive Latency and Bank Interleaving
13.4.6. User-Controlled Refresh
13.4.7. Frequency of Operation
13.4.8. Series of Reads or Writes
13.4.9. Data Reordering
13.4.10. Starvation Control
13.4.11. Command Reordering
13.4.12. Bandwidth
13.4.13. Enable Command Priority Control
14.1. Interface Configuration Performance Issues
14.2. Functional Issue Evaluation
14.3. Timing Issue Characteristics
14.4. Verifying Memory IP Using the Signal Tap II Logic Analyzer
14.5. Hardware Debugging Guidelines
14.6. Categorizing Hardware Issues
14.7. Debugging Arria® 10 EMIF IP
14.8. Using the Traffic Generator with the Generated Design Example
14.5.1. Create a Simplified Design that Demonstrates the Same Issue
14.5.2. Measure Power Distribution Network
14.5.3. Measure Signal Integrity and Setup and Hold Margin
14.5.4. Vary Voltage
14.5.5. Operate at a Lower Speed
14.5.6. Determine Whether the Issue Exists in Previous Versions of Software
14.5.7. Determine Whether the Issue Exists in the Current Version of Software
14.5.8. Try A Different PCB
14.5.9. Try Other Configurations
14.5.10. Debugging Checklist
14.7.1.1. User Interface
14.7.1.2. Communication
14.7.1.3. Setup and Use
14.7.1.4. Configuring Your EMIF IP for Use with the Debug Toolkit
14.7.1.5. Reports
14.7.1.6. On-Die Termination Calibration
14.7.1.7. Eye Diagram
14.7.1.8. Driver Margining for Arria® 10 EMIF IP
14.7.1.9. Example Tcl Script for Running the EMIF Debug Toolkit
14.7.1.10. Using the EMIF Debug Toolkit with Arria® 10 HPS Interfaces
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6.1.7. Intel Arria 10 EMIF IP DDR3 Parameters: Controller
Display Name | Description |
---|---|
Enable Auto Power-Down | Enable this parameter to have the controller automatically place the memory device into power-down mode after a specified number of idle controller clock cycles. The idle wait time is configurable. All ranks must be idle to enter auto power-down. (Identifier: CTRL_DDR3_AUTO_POWER_DOWN_EN) |
Auto Power-Down Cycles | Specifies the number of idle controller cycles after which the memory device is placed into power-down mode. You can configure the idle waiting time. The supported range for number of cycles is from 1 to 65534. (Identifier: CTRL_DDR3_AUTO_POWER_DOWN_CYCS) |
Display Name | Description |
---|---|
Enable User Refresh Control | When enabled, user logic has complete control and is responsible for issuing adaquate refresh commands to the memory devices, via the MMR interface. This feature provides increased control over worst-case read latency and enables you to issue refresh bursts during idle periods. (Identifier: CTRL_DDR3_USER_REFRESH_EN) |
Enable Auto-Precharge Control | Select this parameter to enable the auto-precharge control on the controller top level. If you assert the auto-precharge control signal while requesting a read or write burst, you can specify whether the controller should close (auto-precharge) the currently open page at the end of the read or write burst, potentially making a future access to a different page of the same bank faster. (Identifier: CTRL_DDR3_AUTO_PRECHARGE_EN) |
Address Ordering | Controls the mapping between Avalon addresses and memory device addresses. By changing the value of this parameter, you can change the mappings between the Avalon-MM address and the DRAM address. (Identifier: CTRL_DDR3_ADDR_ORDER_ENUM) |
Enable Reordering | Enable this parameter to allow the controller to perform command and data reordering. Reordering can improve efficiency by reducing bus turnaround time and row/bank switching time. Data reordering allows the single-port memory controller to change the order of read and write commands to achieve highest efficiency. Command reordering allows the controller to issue bank management commands early based on incoming patterns, so that the desired row in memory is already open when the command reaches the memory interface. For more information, refer to the Data Reordering topic in the EMIF Handbook. (Identifier: CTRL_DDR3_REORDER_EN) |
Starvation limit for each command | Specifies the number of commands that can be served before a waiting command is served. The controller employs a counter to ensure that all requests are served after a pre-defined interval -- this ensures that low priority requests are not ignored, when doing data reordering for efficiency. The valid range for this parameter is from 1 to 63. For more information, refer to the Starvation Control topic in the EMIF Handbook. (Identifier: CTRL_DDR3_STARVE_LIMIT) |
Enable Command Priority Control | Select this parameter to enable user-requested command priority control on the controller top level. This parameter instructs the controller to treat a read or write request as high-priority. The controller attempts to fill high-priority requests sooner, to reduce latency. Connect this interface to the conduit of your logic block that determines when the external memory interface IP treats the read or write request as a high-priority command. (Identifier: CTRL_DDR3_USER_PRIORITY_EN) |
Display Name | Description |
---|---|
Enable Memory-Mapped Configuration and Status Register (MMR) Interface | Enable this parameter to change or read memory timing parameters, memory address size, mode register settings, controller status, and request sideband operations. (Identifier: CTRL_DDR3_MMR_EN) |
Enable Error Detection and Correction Logic with ECC | Enables error-correction code (ECC) for single-bit error correction and double-bit error detection. ECC is implemented as soft logic. (Identifier: CTRL_DDR3_ECC_EN) |
Enable Auto Error Correction to External Memory | Specifies that the controller automatically schedule and perform a write back to the external memory when a single-bit error is detected. Regardless of whether the option is enabled or disabled, the ECC feature always corrects single-bit errors before returning the read data to user logic. (Identifier: CTRL_DDR3_ECC_AUTO_CORRECTION_EN) |
Enable ctrl_ecc_readdataerror signal to indicate uncorrectable data errors | Select this option to enable the ctrl_ecc_readdataerror signal on the controller top level. The signal has the same timing as the read data valid signal of the Controller Avalon Memory-Mapped interface, and is asserted high to indicate that the read data returned by the Controller in the same cycle contains errors uncorrectable by the ECC logic. (Identifier: CTRL_DDR3_ECC_READDATAERROR_EN) |
Export error-correction code (ECC) status ports | Enable this parameter to export ECC status ports. (Identifier: CTRL_DDR3_ECC_STATUS_EN) |
Display Name | Description |
---|---|
Additional read-to-write turnaround time (same rank) | Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a read to a write within the same logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR3_RD_TO_WR_SAME_CHIP_DELTA_CYCS) |
Additional write-to-read turnaround time (same rank) | Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a write to a read within the same logical rank. This can help resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR3_WR_TO_RD_SAME_CHIP_DELTA_CYCS) |
Additional read-to-read turnaround time (different ranks) | Specifies additional number of idle controller (not DRAM) cycles when switching the data bus from a read of one logical rank to a read of another logical rank. This can resolve bus contention problems specific to your board topology. The value is added to the default which is calculated automatically. Use the default setting unless you suspect a problem exists. (Identifier: CTRL_DDR3_RD_TO_RD_DIFF_CHIP_DELTA_CYCS) |
Additional read-to-write turnaround time (different ranks) | Specifies additional number of idle controller (not DRA |