SRAM Flow is turned off, as circuit does not meet the eligibility criterion.

This message indicates that the SRAM flow has been turned off because the circuit does not meet the eligibility criterion. The eligibility criterion is a set of requirements or constraints that the circuit must meet in order to use the SRAM flow. These requirements may include the size of the circuit, the technology node, the complexity of the design, and other factors.

If the circuit does not meet these requirements, the SRAM flow cannot be used and this message is displayed. In this case, you may need to modify the design or use a different flow to meet your requirements.

相关问题

FPGA IS61WV1288 SRAM存储

FPGA中的IS61WV1288是一种SRAM存储器芯片。该芯片由ISSI公司生产，具有128K*8位的存储容量。该存储器具有以下特点：
1. 高速访问时间，可以选择8、10、12或15纳秒的访问时间。
2. 采用CMOS技术，具有低功耗特性。
3. 具有TTL兼容的接口电平。
4. 单电源供电，工作电压为3.3V。
5. 无需时钟信号和刷新操作。
6. 支持三态输出。
7. 数据控制分为高字节和低字节。

IS61WV1288的管脚定义和控制信号的真值表可以参考其数据手册。这里提供了一个数据手册的链接，你可以通过阅读该手册进行比较和学习。根据手册中的时序图分析，可以设计基于VHDL的SRAM读写控制。

要在FPGA中使用IS61WV1288存储器，你需要进行以下步骤：
1. 连接FPGA和IS61WV1288芯片，确保电源和信号线连接正确。
2. 在FPGA的设计中，使用FSMC的NORFlash控制器来管理外部存储器，包括IS61WV1288。通过FSMC扩展外部存储器时，需要进行FSMC的初始化配置。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *2* [FSMC | STM32与FPGA通信](https://blog.csdn.net/qq_40310273/article/details/112343006)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *3* [片外SRAM芯片IS61LV25616研究](https://blog.csdn.net/dalskjflaskjd/article/details/16808447)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]

SRAM Verilog

SRAM, short for Static Random Access Memory, is a type of memory that retains data as long as power is supplied to it. Verilog is a hardware description language widely used in electronic design automation to model and simulate digital systems.

To implement an SRAM module in Verilog, you can define a module with input and output ports for address, data, read/write control signals, and power supply. Here's an example of a basic 1-bit SRAM module:

module sram_1bit (
  input wire clk,
  input wire enable,
  input wire write,
  input wire [7:0] address,
  input wire [7:0] data_in,
  output reg [7:0] data_out
);

  reg [7:0] memory [255:0]; // 256x8 memory array

  always @(posedge clk) begin
    if (enable) begin
      if (write)
        memory[address] <= data_in;
      else
        data_out <= memory[address];
    end
  end

endmodule

In this example, the SRAM module has a clock input (`clk`), an enable signal (`enable`) to enable the memory operation, a write signal (`write`) to select read or write operation, an address bus (`address`) to specify the memory location, a data input bus (`data_in`) for write operations, and a data output bus (`data_out`) for read operations.

The internal memory array is declared as `reg [7:0] memory [255:0]`, representing a 256x8 memory. The data is stored or retrieved from the memory array based on the control signals and address.

Note that this is a simplified example demonstrating the basic structure of an SRAM module in Verilog. In practice, you may need to add additional features like timing control, address decoding, and more robust error handling.