Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs

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ID 813901
Date 9/03/2024
Public
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. Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs Archives 7. 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 1.2. Agilex™ 5 Embedded Memory Block Signals
2. Agilex™ 5 Embedded Memory Architecture and Features x
2.1. Byte Enable in Agilex™ 5 Embedded Memory Blocks 2.2. Address Hold 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. Error Correction Code Truth Table 2.4.2. Parity Bit 2.4.3. ECC Parity Flip 2.4.4. ECC Read-During-Write Behavior
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
2.10. True Dual Port Dual Clock Emulator x
2.10.1. True Dual-Port Mixed Port Read During Write New Data Emulation
3. Agilex™ 5 Embedded Memory Design Considerations x
3.1. Consider the Memory Block Selection 3.2. Consider the Concurrent Write Behavior 3.3. Read-During-Write (RDW) 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. Read-During-Write (RDW) x
3.3.1. Customize Read-During-Write Behavior
3.3.1. Customize Read-During-Write Behavior x
3.3.1.1. Same-Port Read-During-Write Mode 3.3.1.2. Mixed-Port Read-During-Write Mode 3.3.1.3. Read-During-Write Data Output and Memory Location Behaviors
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. Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs Archives
7. Document Revision History for the Embedded Memory User Guide: Agilex™ 5 FPGAs and SoCs

4.1.4. RAM: 4-PORT Intel® FPGA IP Parameters

This table lists the parameters for the RAM: 4-PORT Intel® FPGA IP.
Table 26.  RAM: 4-PORT Intel® FPGA IP Parameter Settings
Parameter Legal Values Description
Parameter Settings: Widths/ Blk Type
How many words of memory? — Specifies the number of bit words.
How wide should the ‘q_a’ and ‘q_b’ output bus be? — Specifies the width of the input and output ports.
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.
Parameter Settings: Clks/Rd, Byte En
Which clocking method do you want to use? Single Specifies the clocking method to use.

Single—A single clock and a clock enable controls all registers of the memory block.

Create ‘rden_a’ and ‘rden_b’ read enable signals

 — Specifies whether to create a read enable signal for ports A and B.
Byte Enable Ports
  • Create byte enable for port A
  • Create byte enable for port B
 On/Off Specifies whether to create a byte enable for ports A and B. Turn on these options if you want to mask the input data so that only specific bytes, nibbles, or bits of data are written.

What is the width of a byte for byte enables?

 M20K: 5, 8, 9, or 10

Specifies the byte width of the byte enable port. The width of the data input port must be divisible by the byte size.
Parameter Settings: Regs/Clkens/Aclrs
Which ports should be registered?
Input registers:
  • All write input ports
  • raddress port
Output registers:
  • q_a port
  • q_b port
 On/Off Specifies whether to register the read or write input and output ports.
Use clock enable for input and output registers. On/Off Specifies whether to turn on the option to create one clock enable signal for the input and output registers.
Create an ‘aclr’ asynchronous clear for the input ports or output ports.
Read Input Aclrs:
  • ‘rdaddress‘ for port A
  • ‘rdaddress‘ for port B
 On/Off Specifies whether to create an asynchronous clear port for the input ports or output ports.
Read input ports:
  • ‘rdaddress‘ for port A—Specifies whether the rdaddress for port A is cleared by the aclr port.
  • ‘rdaddress‘ for port B—Specifies whether the rdaddress for port B is cleared by the aclr port.
Output Aclrs:
  • q_a port—Specifies whether the q_a port is cleared by the aclr port.
  • q_b port—Specifies whether the q_b port is cleared by the aclr port.
Create an ‘sclr’ synchronous clear for the output ports.
Output Sclrs:
  • q_a port
  • q_b port
 On/Off Specifies whether to create a synchronous clear port for the output ports.
Output Sclrs:
  • q_a port—Specifies whether the q_a port is cleared by the sclr port.
  • q_b port—Specifies whether the q_b port is cleared by the sclr port.
Parameter Settings: Output 1
How should the q_a and q_b outputs behave when reading a memory location that is being written from the other port?

The output of port A will be ‘NEW’ while the output of port B will be ‘OLD’

Specifies the output behavior when read-during-write occurs.
Parameter Settings: Output 2
What should the ‘q_a’ output be when reading from a memory location being written to? Don't Care

Specifies the output behavior when read-during-write occurs.
What should the ‘q_b’ output be when reading from a memory location being written to?
Parameter Settings: Mem Init
Do you want to specify the initial content of the memory?

Type:

  • No, leave it blank
  • Yes, use this file for the memory content data

Specifies the initial content of the memory.

To initialize the memory to zero, select No, leave it blank.

To use a memory initialization file (.mif) or a hexadecimal (Altera-format) file (.hex), select Yes, use this file for the memory content data.

Initialize memory content data to XX..X on power-up simulation On/Off —
The initial content file should conform to which port's dimensions?
  • PORT_A
  • PORT_B
If you select to use the initial content file for memory content data, select the port the file should conform to.
Implement clock-enable circuitry for use in a partial reconfiguration region On/Off

Specifies whether to implement clock-enable circuitry for use in a partial reconfiguration region.
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.
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