Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs

Download PDF
ID 813901
Date 4/01/2024
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
Document Table of Contents x
1. Agilex™ 5 Embedded Memory Overview 2. Agilex™ 5 Embedded Memory Architecture and Features 3. Agilex™ 5 Embedded Memory Design Considerations 4. Agilex™ 5 Embedded Memory IP References 5. Agilex™ 5 Embedded Memory Debugging 6. Document Revision History for the Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs
1. Agilex™ 5 Embedded Memory Overview x
1.1. Agilex™ 5 Embedded Memory Features
2. Agilex™ 5 Embedded Memory Architecture and Features x
2.1. Byte Enable in Agilex™ 5 Embedded Memory Blocks 2.2. Address Clock Enable Support 2.3. Asynchronous Clear and Synchronous Clear 2.4. Memory Blocks Error Correction Code (ECC) Support 2.5. Agilex™ 5 Embedded Memory Clocking Modes 2.6. Agilex™ 5 Embedded Memory Configurations 2.7. Force-to-Zero 2.8. Coherent Read Memory 2.9. Freeze Logic 2.10. True Dual Port Dual Clock Emulator 2.11. Initial Value of Read and Write Address Registers 2.12. Timing/Power Optimization Feature in M20K Blocks
2.1. Byte Enable in Agilex™ 5 Embedded Memory Blocks x
2.1.1. Byte Enable Controls 2.1.2. Data Byte Output 2.1.3. Byte Enable Behavior
2.4. Memory Blocks Error Correction Code (ECC) Support x
2.4.1. Parity Bit 2.4.2. ECC Parity Flip 2.4.3. ECC Read-During-Write Behavior 2.4.4. Error Correction Code Truth Table
2.5. Agilex™ 5 Embedded Memory Clocking Modes x
2.5.1. Single Clock Mode 2.5.2. Read/Write Clock Mode 2.5.3. Input/Output Clock Mode 2.5.4. Asynchronous/Synchronous Clears in Clocking Modes 2.5.5. Output Read Data in Simultaneous Read/Write 2.5.6. Independent Clock Enables in Clocking Modes
2.6. Agilex™ 5 Embedded Memory Configurations x
2.6.1. Mixed-Width Port Configurations
2.8. Coherent Read Memory x
2.8.1. Forwarding Logic
3. Agilex™ 5 Embedded Memory Design Considerations x
3.1. Consider the Memory Block Selection 3.2. Consider the Concurrent Read Behavior 3.3. Customize Read-During-Write Behavior 3.4. Consider Power-Up State and Memory Initialization 3.5. Reduce Power Consumption 3.6. Avoid Providing Non-Deterministic Input 3.7. Avoid Changing Clock Signals and Other Control Signals Simultaneously 3.8. Advanced Settings in Quartus® Prime Software for Memory 3.9. Consider the Memory Depth Setting 3.10. Consider Registering the Memory Output
3.3. Customize Read-During-Write Behavior x
3.3.1. Same-Port Read-During-Write Mode 3.3.2. Mixed-Port Read-During-Write Mode
4. Agilex™ 5 Embedded Memory IP References x
4.1. On Chip Memory RAM and ROM Intel® FPGA IP Cores 4.2. FIFO Intel® FPGA IP 4.3. Shift Register (RAM-based) Intel® FPGA IP
4.1. On Chip Memory RAM and ROM Intel® FPGA IP Cores x
4.1.1. Release Information for RAM and ROM Intel® FPGA IPs 4.1.2. RAM: 1-PORT Intel® FPGA IP Parameters 4.1.3. RAM: 2-PORT Intel® FPGA IP Parameters 4.1.4. RAM: 4-PORT Intel® FPGA IP Parameters 4.1.5. ROM: 1-PORT Intel® FPGA IP Parameters 4.1.6. ROM: 2-PORT Intel® FPGA IP Parameters 4.1.7. Changing Parameter Settings Manually 4.1.8. RAM and ROM Interface Signals
4.1.7. Changing Parameter Settings Manually x
4.1.7.1. RAM and ROM Parameter Settings
4.2. FIFO Intel® FPGA IP x
4.2.1. Release Information for FIFO Intel® FPGA IP 4.2.2. Configuration Methods 4.2.3. Specifications 4.2.4. FIFO Functional Timing Requirements 4.2.5. SCFIFO ALMOST_EMPTY Functional Timing 4.2.6. FIFO Output Status Flag and Latency 4.2.7. FIFO Metastability Protection and Related Options 4.2.8. FIFO Synchronous Clear and Asynchronous Clear Effect 4.2.9. SCFIFO and DCFIFO Show-Ahead Mode 4.2.10. Different Input and Output Width 4.2.11. DCFIFO Timing Constraint Setting 4.2.12. Coding Example for Manual Instantiation 4.2.13. Instantiation Template 4.2.14. Design Example 4.2.15. Gray-Code Counter Transfer at the Clock Domain Crossing 4.2.16. Guidelines for Embedded Memory ECC Feature 4.2.17. FIFO Intel® FPGA IP Parameters 4.2.18. Reset Scheme
4.2.3. Specifications x
4.2.3.1. Verilog HDL Prototype 4.2.3.2. VHDL Component Declaration 4.2.3.3. VHDL LIBRARY-USE Declaration 4.2.3.4. HDL Code from Parameterizable Macros Template 4.2.3.5. FIFO Signals 4.2.3.6. FIFO Parameter Settings
4.2.8. FIFO Synchronous Clear and Asynchronous Clear Effect x
4.2.8.1. Recovery and Removal Timing Violation Warnings when Compiling a DCFIFO
4.2.11. DCFIFO Timing Constraint Setting x
4.2.11.1. Embedded Timing Constraint 4.2.11.2. User Configurable Timing Constraint
4.2.11.2. User Configurable Timing Constraint x
4.2.11.2.1. SDC Commands
4.3. Shift Register (RAM-based) Intel® FPGA IP x
4.3.1. Release Information for Shift Register (RAM-based) Intel® FPGA IP 4.3.2. Shift Register (RAM-based) Intel® FPGA IP Features 4.3.3. Shift Register (RAM-based) Intel® FPGA IP General Description 4.3.4. Shift Register (RAM-based) Intel® FPGA IP Parameter Settings 4.3.5. Shift Register Ports and Parameters Setting
1. Agilex™ 5 Embedded Memory Overview
2. Agilex™ 5 Embedded Memory Architecture and Features
3. Agilex™ 5 Embedded Memory Design Considerations
4. Agilex™ 5 Embedded Memory IP References
5. Agilex™ 5 Embedded Memory Debugging
6. Document Revision History for the Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs

4.1.6. ROM: 2-PORT Intel® FPGA IP Parameters

This table lists the parameters for the ROM: 2-PORT Intel® FPGA IP.
Table 25.  ROM: 2-PORT Intel® FPGA IP Parameter Settings
Parameter Legal Values Description
Parameter Settings: Widths/Blk Type
How do you want to specify the memory size?
  • As a number of words
  • As a number of bits
Determines whether to specify the memory size in words or bits.
How many words of memory? 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, or 65536 Specifies the number of words.
Use different data widths on different ports On/Off Specifies whether to use different data widths on different ports.
How wide should the ‘q_a’ output bus be? — Specifies the width of the ‘q_a’ and ‘q_b’ output ports.
How wide should the ‘q_b’ output bus be?
RAM block type Auto, M20K Specifies the memory block type. The types of memory block that are available for selection depends on your target device
Set the maximum block depth to:
  • Auto: Auto, 512, 1024, or 2048
  • M20K: Auto, 512, 1024, or 2048
Specifies the maximum block depth in words. This option is enabled only when you choose Auto as the memory block type.
Parameter Settings: Clks/Rd
What clocking method would you like to use?
  • Single
  • Dual clock: use separate ‘input’ and ‘output’ clocks
  • Customize clocks for A and B ports

Specifies the clocking method to use.

  • Single—A single clock and a clock enable controls all registers of the memory block
  • Dual clock: use separate ‘input’ and ‘output’ clocks—The input clock controls the address registers and the output clock controls the data-out registers. There are no write-enable, byte-enable, or data-in registers in ROM mode.
  • Customize clocks for A and B ports—Clock A controls all registers on the port A side; clock B controls all registers on the port B side. Each port also supports independent clock enables for both port A and port B registers, respectively.
Create a ‘rden_a’ and ‘rden_b’ read enable signals On/Off Specifies whether to create read enable signals.
Parameter Settings: Regs/Clkens/Aclrs
Which ports should be registered?

Read output ports

 On/Off Specifies whether to register the read output ports.
More Options Registered Q Output Ports
  • ‘q_a’ port
  • ‘q_b’ port
 On/Off Turn on if you want the registered ‘q_a’ and ‘q_b’ ports to be affected by the asynchronous clear signal.
  • q_a port—Specifies whether to register the ‘q_b’ output port.
  • q_b port—Specifies whether to register the ‘q_b’ output port.
Use clock enable for port A input registers On/Off Specifies whether to use clock enable for port A input registers.
Use clock enable for port A output registers On/Off Specifies whether to use clock enable for port A output registers.
Use clock enable for port B input registers On/Off Specifies whether to use clock enable for port B input registers.
Use clock enable for port B output registers On/Off Specifies whether to use clock enable for port B output registers.
Aclr Options
  • ‘q_a’ port
  • ‘q_b’ port
 On/Off Specifies whether the registered ports should be cleared by the asynchronous clear port.
Sclr Options
  • ‘q_a’ port
  • ‘q_b’ port
 On/Off Specifies whether the registered ports should be cleared by the synchronous clear port.
Parameter Settings: Mem Init
Do you want to specify the initial content of the memory?
  • No, leave it blank
  • Yes, use this file for the memory content data

Specifies the initial content of the memory.

In ROM mode, you must specify a memory initialization file (.mif) or a hexadecimal (Intel-format) file (.hex). The Yes, use this file for the memory content data option is turned on by default.
The initial content file should conform to which port’s dimensions?
  • PORT_A
  • PORT_B
Specifies whether the initial content file conforms to port A or port B.
Parameter Settings: Performance Optimization
Enable Force-to-Zero On/Off Specifies whether to set the output to zero when you deassert the read enable signal.

Enabling this feature helps improve the glue logic performance when the selected memory depth is larger than a single memory block.

Which timing/power optimization option do you want to use?
  • Auto
  • High Speed
  • Low Power
Specifies the timing/power optimization option to use. This option is only applicable when you select M20K memory type on Agilex™ 5 devices.
Level Two Title