Samsung’s Eight-core Chip Goes Hacking

A Samsung eight-core chip used in some Galaxy S4 mobile devices is now available for hackers to play with on a developer board from South Korea-based Hardkernel.

Hardkernel’s Odroid XU board has incorporated Samsung’s eight-core Exynos 5 Octa 5410 chip, which is based on ARM’s latest processor designs. Samsung recently announced a new eight-core chip, the Exynos 5 Octa 5420, which packs faster graphics and application processing than the 5410. The 5420 has not yet been shipped yet, however.

The Odroid board is priced at $149 through Aug. 31, after which it will be offered for $169. Samsung for many months has said that a board with an eight-core chip would be released, and has shown prototype developer boards at conferences.

Odroid-XU will provide developers an opportunity to write programs tuned for Samsung’s octa-core chip, which has been a source of controversy. Analysts have said the eight-core design is overkill for small devices like smartphones and tablets, which need long battery life.

The eight-core chip design also takes up a lot of space, which prevented Samsung from putting LTE radios inside some Galaxy S4 models. Qualcomm, which hesitantly moved from the dual core to the quad-core design on its Snapdragon chips, on Friday criticized eight-core chips, calling the idea “dumb.”

Despite the criticism, the board will give developers a first true glimpse of, and an opportunity to write and test applications for, ARM’s Big.Little design. The design combines high-power cores for demanding applications with low-power cores for mundane tasks like texting and calling.

Samsung’s iteration of Big.Little in the Exynos 5 Octa 5410 chip combines four processors based on ARM’s latest Cortex-A15 processor design, which incorporates four low-power Cortex-A7 CPUs. The Cortex-A15 is ARM’s latest processor design and succeeds the previous Cortex-A9 core, which was used in popular smartphones like Apple’s iPhone and the Galaxy S3. Samsung said the eight-core chip provides a balance of power and performance, with the high-power cores kicking in only when necessary.

The board has an Imagination Technologies PowerVR SGX544MP3 graphics processor, 2GB of low-power DDR3 DRAM, two USB 3.0 ports and four USB 2.0 ports. Other features include Wi-Fi, Ethernet and optional Bluetooth. Google’s Android 4.2 operating system is preloaded, and support for other Linux distributions like Ubuntu is expected soon. The board has already been benchmarked on Ubuntu 13.04.

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The FCC Gives AT&T The OK

The U.S. Federal Communications Commission approved AT&T’s US$1.9 billion buying of spectrum from Qualcomm on Thursday, allowing the carrier to salvage one ambitious deal to acquire more spectrum, after squashing its planned merger with T-Mobile USA.

AT&T announced its plan to buy the Qualcomm spectrum last December, a few months before it revealed the much larger proposal to merge with T-Mobile for $39 billion. It said both were motivated by the need for more radio spectrum to increase the coverage and capacity of its LTE (Long-Term Evolution) network. AT&T withdrew the T-Mobile plan on Monday after the FCC, the Department of Justice and others said it was not in the public interest.

With the Qualcomm purchase, AT&T will get 6MHz of spectrum across the country in the coveted 700MHz band, as well as another 6MHz of spectrum in five major metropolitan areas: New York, Boston, Philadelphia, Los Angeles and San Francisco, according to the FCC’s order released Thursday. Those five markets represent about 70 million potential subscribers. The carrier has said it plans to use it as a supplemental downlink for its LTE network, allowing for faster and more consistent mobile data service.

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Laptop Users Still Prefer USB Modems

Mobile data users still overwhelmingly prefer USB modems for keeping PCs and other devices connected while on the go, but they may turn more to built-in cellular radios and portable Wi-Fi hotspots over the few years, according to ABI Research.

Despite the growing market for connected tablets and the availability of laptops and netbooks with high-speed cellular modules built in, worldwide shipments of USB modems still surpass embedded 3G and 4G modules by three to one, ABI said in a report Monday. But by 2016, that ratio may change to near an even split, said ABI analyst Jeff Orr.

Mobile operators including AT&T, Verizon Wireless and Clearwire give consumers the option of buying a laptop or netbook with an integrated cellular module. Those computers let subscribers go online almost anywhere without using up a USB port or carrying around a separate piece of hardware that sticks out of the side of the system.

Built-in modems lock buyers into one carrier or network technology for the life of the device, which most consumers and enterprises don’t want, Orr said. They buy USB modems because they can be easily discarded when a better network comes along, he said. Prices are low and often there is no early termination fee for getting out of the carrier data contract.  “That device becomes almost disposable,” he said.

One problem with built-in modems is that wireless technology changes faster than most users want to change computers. For example, the past three years — a typical PC lifetime — have seen the construction of both a WiMax and an LTE network in many cities around the U.S., offering 10 times or more the speed of 3G networks.

The market for embedded modems is still fairly small, according to ABI. In 2010, only about 5% of laptops worldwide shipped with built-in cellular modems, Orr said. Among netbooks, 17% came with modems, but overall shipments were much smaller for netbooks than for laptops. Meanwhile, 40% of tablets came with such modems, but the overall tablet market was smaller still.

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