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DRAM

DRAM

DRAM Typical Read/Write Speed: 17ns （3000x faster than SSD） SSD Typical Read/Write Speed: 50us DRAM limited to 2-D arrays ~16G SSD 3D-arrays ~2T every 64ms refresh one time. each refresh takes ...

Posted by George Lin on May 30, 2025

Spyglass

Spyglass

https://www.bilibili.com/video/BV1cj411i7zf?spm_id_from=333.788.player.switch&vd_source=6bdb3504029acf6961e3195b9ad841b9 VC Spyglass 工具Lint检查默认使用的方法学说明位置 VC_STATIC_HOME/auxx/monet/tcl/GuideWa...

Posted by George Lin on May 17, 2025

Watchdog

Watchdog

Watchdog Timer（看门狗） 看门狗定时器（WDT，Watch Dog Timer）是单片机的一个组成部分，本质是一个递增（或者递减）的定时器，程序开始执行的时候，看门狗的值就开始递增或者由某固定值递减，到达设定的值的时候单片机就触发中断或者产生系统复位，重新运行。是用来监测单片机运行状态和解决程序引起的故障的模块 防止系统跑飞 看门狗可用于受到电气噪音、电源故障、静电放电等...

Posted by George Lin on May 12, 2025

Verilog

Verilog

bufif1 (Verilog Primitive) buf buf g(out, in) The buffer (buf) passes input to the output as it is. It has only one scalar input and one or more scalar outputs. ...

Posted by George Lin on May 12, 2025

UART

UART

UART整理 https://www.analog.com/en/resources/analog-dialogue/articles/uart-a-hardware-communication-protocol.html https://electronics.stackexchange.com/questions/251341/how-does-uart-know-the-diffe...

Posted by George Lin on May 12, 2025

TPU

TPU

TPUv1 以下参考google论文：In-Datacenter Performance Analysis of a Tensor Processing Unit TPU(Tensor Processing Unit)性能指标： 核心是256*256个8-bit MAC 时钟频率700MHz 峰值吞吐率92TeraOps/Second (TOPS)（每个MAC乘和加各算一...

Posted by George Lin on May 12, 2025

QoS

QoS

Quality of Service (QoS) def: a set of technologies that work on a network to guarantee its ability to dependably run high-priority applications and traffic under limited network capacity QoS giv...

Posted by George Lin on May 12, 2025

Flow-Control

Flow-Control

Credit-based flow control https://juejin.cn/post/7042193831445397511 流控 防止网络在拥塞的情况下出现丢帧。 Credit-based flow control本质上是receiver对sender的一种背压（backpressure）机制。其前身源于TCP滑动窗口。 TCP滑动窗口 在上面这张图中，假设...

Posted by George Lin on May 12, 2025

Debug1

Debug1

“Flipped” and “Decoupled” in Chisel Flipped Purpose: The Flipped method indicates that a particular port is an input to the module instead of an output. This is particularly useful in the cont...

Posted by George Lin on May 12, 2025

DMA

DMA

MCU和SOC的区别 MCU比SoC的外设更简单更少 SoC可以运行操作系统，MCU不能 SoC更重视性能，MCU更重视成本 知乎深入理解AMBA总线 专栏 共20篇深度长文 推荐！！！ https://www.zhihu.com/column/c_1663245806869291008 关于ahb_dmac的programmer model里面的寄存器地址，可以在D...

Posted by George Lin on May 12, 2025

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