Parallel Flash Loader Intel® FPGA IP User Guide

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ID 683698
Date 7/23/2021
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Document Table of Contents
Document Table of Contents x
1. Parallel Flash Loader Intel® FPGA IP User Guide
1. Parallel Flash Loader Intel® FPGA IP User Guide x
1.1. Features 1.2. Device Support 1.3. Functional Description 1.4. Using the PFL IP Core 1.5. PFL IP Core In Embedded Systems 1.6. Third-party Programmer Support 1.7. Parameters 1.8. Signals 1.9. Specifications 1.10. Parallel Flash Loader Intel® FPGA IP User Guide Archives 1.11. Document Revision History for the Parallel Flash Loader Intel® FPGA IP User Guide
1.2. Device Support x
1.2.1. Supported Flash Memory Devices 1.2.2. Supported Schemes and Features
1.3. Functional Description x
1.3.1. Programming Flash Memory 1.3.2. Controlling Intel® FPGA Configuration from Flash Memory 1.3.3. Mapping PFL and Flash Address 1.3.4. Implementing Page in the Flash .pof 1.3.5. Using Enhanced Bitstream Compression and Decompression 1.3.6. Using Remote System Upgrade
1.3.1. Programming Flash Memory x
1.3.1.1. Programming CFI Flash 1.3.1.2. Programming Quad SPI Flash 1.3.1.3. Programming NAND Flash
1.3.4. Implementing Page in the Flash .pof x
1.3.4.1. Storing Option Bits
1.3.6. Using Remote System Upgrade x
1.3.6.1. Remote System Upgrade State Machine in the PFL IP Core 1.3.6.2. Implementing Remote System Upgrade with the PFL IP Core 1.3.6.3. User Watchdog Timer
1.4. Using the PFL IP Core x
1.4.1. Converting .sof Files to a .pof 1.4.2. Constraining PFL Timing 1.4.3. Simulating PFL Design 1.4.4. Programming Intel® CPLDs and Flash Memory Devices 1.4.5. Defining New CFI Flash Device 1.4.6. Programming Multiple Flash Memory Devices 1.4.7. Creating Jam Files for Intel® CPLDs and Flash Memory Device Programming
1.4.2. Constraining PFL Timing x
1.4.2.1. Constraining Clock Signal 1.4.2.2. Constraining Synchronous Input and Output Ports 1.4.2.3. Constraining Asynchronous Input and Output Ports, and Bidirectional Synchronous Ports 1.4.2.4. Summary of PFL Timing Constraints
1.4.3. Simulating PFL Design x
1.4.3.1. Creating a Test Bench File for PFL Simulation 1.4.3.2. Performing PFL Simulation in the ModelSim- Intel® FPGA Software 1.4.3.3. Performing PFL Simulation for FPGA Configuration
1.4.4. Programming Intel® CPLDs and Flash Memory Devices x
1.4.4.1. Programming Intel® CPLDs and Flash Memory Devices Separately
1.9. Specifications x
1.9.1. Configuration Time Calculation Examples
1. Parallel Flash Loader Intel® FPGA IP User Guide

1.4.3.3. Performing PFL Simulation for FPGA Configuration

Before beginning the FPGA configuration, the PFL IP core reads the option bits stored in the option bits sector to obtain information about the .pof version used for flash programming, the start and end address of each page of the configuration image stored in the flash, and the Page-Valid bit.

In this simulation example, the start and end addresses of the option bits sector are 0×800000 and 0×800080, respectively. The PFL IP core first reads from the final address, which is 0×800080, to obtain the .pof version information. Because fpga_pgm[2..0] is set to 000, the PFL IP core reads from address 0×800000 to address 0×800003 to get the start and end address of page 0 and the Page-Valid bit. The LSB in address 0×800000 is the Page-Valid bit.

The Page-Valid bit must be 0 for the PFL IP core to proceed with FPGA configuration. While the PFL IP core reads from the flash, it asserts the active-low flash_nce and flash_noe signals, and asserts the active-high pfl_flash_access_request signal.

Note: Before you perform the device configuration simulation, ensure that the PFL IP core receives the correct option bits address and associated values to guarantee correct simulation output.
Figure 20. Simulation Before ConfigurationFigure shows the simulation when the PFL IP core reads the option bits from the flash memory device before configuration starts.

After reading the option bits for page 0, the PFL IP core waits for a period of time before the configuration starts. The flash_data remains at 0×ZZ within this period. Configuration starts when the fpga_dclk starts to toggle. During configuration, the PFL IP core asserts the flash_nce and flash_noe signals low, and the pfl_flash_access_request signal high.

Figure 21. Simulation When FPGA Configuration Starts

The FPGA configuration continues until the fpga_conf_done signal is asserted high, which indicates the configuration is complete. After the configuration process completes, the PFL IP core pulls the flash_nce and flash_noe signals high and the pfl_flash_access_request signal low to indicate the configuration data is no longer being read from the flash memory device.

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