电子工程专辑

DMA原理，步骤超细详解，一文看懂DMA

DMA，全称Direct Memory Access，即直接存储器访问。 DMA传输将数据从一个地址空间复制到另一个地址空间，提供在外设和存储器之间或者存储器和存储器之间的高速数据传输。 我们知道CPU有转移数据、计算、控制程序转移等很多功能，系统运作的核心就是CPU， CPU无 ...
电子工程专辑

一文彻底理解DMA

1.什么是DMA，有什么作用？ DMA用于在外设与存储器之间以及存储器与存储器之间提供高速数据传输。可以在无需任何 CPU 操作的情况下通过 DMA 快速移动数据。这样节省的 CPU 资源可供其它操作使用。 我们用一个现实例子来做个类比。有一家冶炼公司，每天要不断 ...
Electronics Weekly

Plenty of analogue, and DMA, in 8pin 8bit STM8 MCU

STMicroelectronics has put plenty of analogue features and DMA (direct memory access) into its latest 8bit 8pin microcontroller. Dubbed STM8L050, alongside two comparators, it has four-channel 12bit ...
Hackaday

12 Mbps Communication Between A PC And MCU

The world of hobby electronics have only started putting USB in projects for the last few years, and right now, pushing 1.5 Mbps down a USB port is good enough for most cases. This isn’t true for all ...
Hackaday

Better LEDs Through DMA

While regular Hackaday readers already know how to blink a LED with a microcontroller and have moved onto slightly more challenging projects such as solving the Navier-Stokes equations in 6502 ...
EDN

Microcontroller interfaces ARM7 core with FPGA

Atmel’s ARM7-based AT91CAP7E microcontroller includes an FPGA interface, a six-layer AHB (advanced high-speed bus), a peripheral-DMA controller, and 160 kbytes of on-chip SRAM. The FPGA interface ...
Design-Reuse

Dolphin Integration enriches its line of 80251 with a new DMA for high density and robustness

Grenoble, France -- August 23, 2013 -- Dolphin Integration presents a new peripheral to extend its wide offer for 80251 and 8051 microcontroller. The FlipDMA is proposed with many features, while ...
Electronic Design

Offloading CPU Boosts Microcontroller Performance And Cuts Power

Why should designers offload a microcontroller’s CPU? Performance and power consumption are the typical reasons for adding offload capability to a microcontroller ...
EDN

Customizable microcontroller, $75,000 NRE costs target 10,000-unit applications

Atmel’s AT91CAP7L standard-product microcontroller has as many as 200,000 gates of MCPF (metal-programmable-cell fabric) that you can use to implement proprietary customer IP (intellectual property), ...