本文主要是介绍vivado SLEW,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
SLEW为配置了I/O标准的输出缓冲区指定了输出缓冲区转换速率
支持可编程输出转换速率。
架构支持
所有架构。
适用对象
•端口(get_Ports)
°连接输出或双向端口
•单元(get_cell)
°输出缓冲器(所有OBUF变体)
价值观
•慢速(默认)
•中等:适用于UltraScale体系结构,仅适用于高性能(HP)I/O。
•快速
Syntax
Verilog Syntax
To set this attribute when inferring I/O buffers, place the proper Verilog attribute syntax
before the top-level output port declaration.
(* DRIVE = "{SLOW|FAST}" *)
Verilog Syntax Example
// Sets the Slew rate to be FAST
(* SLEW = "FAST" *) output FAST_DATA,
VHDL Syntax
To set this attribute when inferring I/O buffers, place the proper VHDL attribute syntax
before the top-level output port declaration.
Declare the VHDL attribute as follows:
attribute SLEW : string;
Specify the VHDL attribute as follows:
attribute SLEW of port_name : signal is value;
Where
• port_name is a top-level output port.
VHDL Syntax Example
FAST_DATA : out std_logic;
attribute SLEW : string;
-- Sets the Slew rate to be FAST
attribute SLEW of STATUS : signal is “FAST”;
XDC Syntax
set_property SLEW value [get_ports port_name]
Where
• port_name is an output or bidirectional port.
XDC Syntax Example
# Sets the Slew rate to be FAST
set_property SLEW FAST [get_ports FAST_DATA]
这篇关于vivado SLEW的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!