HIFIVE UNLEASHED – THE FIRST RISC-V-BASED LINUX DEVELOPMENT BOARD

RISC-V is an open specification of an Instruction Set Architecture (ISA). That is, it describes the way in which software talks to an underlying processor – just like the x86 ISA for Intel/AMD processors and the ARM ISA for ARMprocessors. Unlike those, however, the RISC-V ISA is open so that anyone can build a processor that supports it. Just as Linux revolutionize the software world, RISC-V could create a ...

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Panasonic PAN9420 is a standalone fully embedded Wi-Fi Module

Building an Internet of Things infrastructure most times depends upon the wireless connectivity, but there are many options for wireless and not every device is IP addressable – a requisite feature for IoT. There are many wireless interface options, Wi-Fi, Bluetooth Low Energy (BLE), ZigBee, Z-Wave, Lora, RFID and Satellite, each with their own unique balance of power, range, data rates, mesh networking, in ...

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INSIDE INTEL’S FIRST PRODUCT: THE 3101 RAM CHIP HELD JUST 64 BITS

Intel's first product was not a processor, but a memory chip: the 31011 RAM chip, released in April 1969. This chip held just 64 bits of data (equivalent to 8 letters or 16 digits) and had the steep price tag of $99.50.2 The chip's capacity was way too small to replace core memory, the dominant storage technology at the time, which stored bits in tiny magnetized ferrite cores. However, the 3101 performed at ...

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Inside the vintage 74181 ALU chip: how it works and why it’s so strange

The 74181 ALU (arithmetic/logic unit) chip powered many of the minicomputers of the 1970s: it provided fast 4-bit arithmetic and logic functions, and could be combined to handle larger words, making it a key part of many CPUs. But if you look at the chip more closely, there are a few mysteries. It implements addition, subtraction, and the Boolean functions you'd expect, but why does it provide several bizar ...

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TI chip manages power of ARM Cortex processors

Description   The TPS65090A is a single chip Power Management ICs for portable applications consisting of a battery charger with power path management for a dual or triple Li-Ion or Li-Polymer cell battery pack. The charger can be directly connected to an external wall adapter. Three highly efficient step-down converters are targeted for providing a fixed 5 V system voltage, a fixed 3.3 V system voltag ...

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One-chip 11×10 LED matrix. using pic microcontroller

This project is pretty cool for a few reasons, and driving a huge LED matrix with a single 8-bit controller is just one of them. The idea was born when I bought 120 LEDs of the wrong type, and decided to do something with them. With that many LEDs, there are only a few things you can do, and a matrix is the natural first-place-winner in the competition of those ideas. One of the LEDs did not work, so a 12x1 ...

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Chip senses gesture through electric fields

Description The PS25401A is an ultra high impedance non-contact solid state electric potential sensor. It can be used to detect field disturbance due to the movement of a near-by object. This functionality can be employed in a range of applications including security motion sensors and non-contact electric switches for lighting, door opening, toys etc The device uses active feedback techniques to both lower ...

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LT puts supercapacitor power back-up on a chip

Linear Technology has put the whole of a supercapacitor power back-up system on one chip. Rated at 2A, it will back-up a voltage rail (Vsys) between 1.71 and 5.25V. Key to the chip, called LTC3110, is a 1.2MHz four-switch bi-directional dc-dc converter that both charges the capacitor and can also extract almost all of the energy remaining in it – as it keeps on switching until the capacitor has only 100mV l ...

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FTDI Chip adds EVE Screen Designer

Bringing more comprehensive support to its Embedded Video Engine (EVE) product offering, FTDI Chip introduces EVE Screen Designer – which is available to download for free. Suitable for use with Windows 7 and above, the development suite enables the creation of advanced human machine interfaces (HMIs), via EVE’s  object-oriented approach, without any understanding of EVE display lists. This makes it more ac ...

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Reverse engineering the popular 555 timer chip (CMOS version)

This article explains how the LMC555 timer chip works, from the tiny transistors and resistors on the silicon chip, to the functional units such as comparators and current mirrors that make it work. The popular 555 timer integrated circuit is said to be the world's best-selling integrated circuit with billions sold since it was designed in 1970 by analog IC wizard Hans Camenzind[1]. The LMC555 is a low-powe ...

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