fsmc modea 时序图
时间: 2024-04-22 09:17:47 浏览: 109
FSMC(Flexible Static Memory Controller)是一种用于连接外部存储器的接口,它可以连接各种类型的存储器,如 SRAM、NOR Flash、NAND Flash 等。FSMC 的模式包括 SRAM 模式、NOR Flash 模式、NAND Flash 模式和 PSRAM 模式等。
FSMC 的模式 A 是 SRAM 模式,它支持异步 SRAM 和同步 SRAM。在 FSMC 模式 A 中,时序图如下:
![fsmc_modea_timing_diagram](https://img-blog.csdn.net/20180522163412909?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Jsb2c5OTk=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/q/80)
时序图中,AS、OE 和 WE 分别表示地址选择信号、输出使能信号和写使能信号。在 SRAM 模式下,数据总线 D0-D15 是双向的,可以用于读写操作。当 AS 为低电平时,表示地址有效,此时 FSMC 会将地址存储在地址寄存器中。当 OE 为低电平时,表示输出有效,此时 FSMC 会从存储器中读取数据并输出到数据总线上。当 WE 为低电平时,表示写入有效,此时 FSMC 会将数据写入到存储器中。
相关问题
nandflash FSMC时序
NAND Flash是一种常见的闪存存储器,FSMC (Flexible Static Memory Controller) 是一种在嵌入式系统中用于控制存储器设备的接口。下面是NAND Flash与FSMC之间的时序关系:
1. 时钟信号:NAND Flash和FSMC之间需要共享相同的时钟信号,以确保数据传输的同步性。
2. 片选信号:FSMC通过控制片选信号来选择NAND Flash芯片。
3. 命令和地址:FSMC通过控制命令和地址信号向NAND Flash发送读取或写入操作的指令和地址。
4. 数据传输:在读取操作中,NAND Flash将数据逐个字节地传输给FSMC。在写入操作中,FSMC将数据逐个字节地传输给NAND Flash。
5. 状态检测:FSMC可以通过状态检测信号来获取当前操作的状态信息,例如读取是否完成或写入是否成功。
6. 等待信号:在某些情况下,NAND Flash可能需要更多时间来完成操作,此时FSMC会等待NAND Flash发出等待信号,以确保操作的正确执行。
需要注意的是,具体的时序要根据所使用的具体芯片和控制器来确定,以上是一般情况下的时序关系。建议参考相关芯片和控制器的数据手册以获取详细的时序信息。
verilog fsmc
Verilog FSMC (Finite State Machine Controller) is a type of digital design that is used to control the operation of a finite state machine. It is a hardware design language used in the design and verification of digital circuits. The FSMC is used to describe the behavior of a digital circuit, and it can be used to design a wide range of digital systems, including microcontrollers, processors, and memory controllers.
The Verilog FSMC is used to define the state transitions of the finite state machine. The FSMC can be represented as a set of states, where each state represents a different behavior of the system. The FSMC can be used to control the operation of the digital circuit by specifying the state transitions that occur based on inputs and outputs.
The FSMC is implemented using sequential logic, which means that it is designed to store and maintain state information. This allows the FSMC to respond to input signals and generate the appropriate output signals based on the current state of the system.
In summary, Verilog FSMC is a powerful digital design tool that can be used to create complex digital systems. It is widely used in the electronics industry and is an essential part of many digital design projects.