NAS 7820/1, Next Generation Media Networked Storage Solution
The Evolution of the Consumer Market
Key Benefits
Unique Trident architecture including
dual-core ARM 11 MP each core running
at 750 MHz, application specific hardware
engines for networking, storage, and
security, and highly structured firmware
for the highest performance at the lowest
system cost
Highly optimized for consumer
applications such as streaming multiple
HD videos, music, and photos with high
quality-of-service (QoS), content
protection, fast back-up, remote access,
trans-coding, and much more
Security engine for encryption with
hashing functionality for enhanced
Booting from HDD without Flash for the
lower BOM cost (support of Flash is
Integrated 1/2 SATA3G/s ports with
RAID0, RAID1, and JBOD support in
We are now witnessing the third wave of the
consumer digital revolution. The first wave was the
introduction of the internet into the homes. The
second wave was the mainstream adoption of
handheld mobile devices such as smart phones and
MP3 players. The third wave is the demand of
consumers to access their content from anywhere,
anytime, and from any device securely and reliably.
This requires a fresh thinking into consumer content
This emerging environment presents new
challenges/opportunities to system designers, as these
new consumer devices now must evolve from a onedimensional model of a single user/application to a
sophisticated, multi-client model running
simultaneous applications.
Rich set of interfaces: dual USB2.0,
Supported file system: SMB, XFS, EXT3,
and NTFS (Read)
Support of many third party application
partners for media serving, remote
access, back-up, and media content
© PLX Technology,
The digital lifesytle is going through major changes.
More and more people are self-creating, purchasing
and downloading digital contant (videos, photos, and
music) than at any time before. This explosion of
digital content demands a fresh approach to
consumer content storage, security, and management.
Long gone are the times that the conventional
“cranking up” of the processor clock could effectively
meet the new requirements and cost structure of the
consumer storage market. There are two orthogonal
requirements: on one hand these new SoCs should
provide high performance in a multi-application and
multi-user environment. At the same time, meet the
cost sensitive requirements of the consumer market.
This requires a new architectural approach.
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NAS 7820/1, Next Generation Media Networked Storage Solution
PLX NAS 7820/1 brings a new architectural
approach to consumer NAS system on a chip
intensive processing requirements, the product has
implemented hardware engines to relieve the
processor and the internal bus from intensive
processing and system traffic. Hence this
improves the overall system performance with
better processor utilization (i.e., higher throughput
per CPU clock) reduces internal traffic within the
SoC, and better cost structure due to less
processor demand. PLX NAS 7820/1 utilizes
hardware offload engines in networking, security,
and storage (i.e., RAID & SATA) areas.
For years the conventional approach to SoC design
has been the bigger hammer approach. To improve
the performance, increase the clock speed of the
processor. This approach has not been unique to the
consumer NAS market but more of a general
semiconductor industry approach.
The PLX 7820/1 changes the game by a holistic view
of the overall system architecture. It uses PLX’s
Trident architectural approach:
Figure 1: Trident Architectural Approach
3. What integrates all the sub-systems together as a
cohesive system is restructured firmware. The key
design criterion is to fully utilize and bond all the
system hardware via highly optimized firmware.
Simply said, optimized firmware to utilize
hardware modules. This is the most challenging
part of the overall system architecture. The PLX
NAS 7820/1 has taken this approach to the next
level by providing the industry’s highest
optimized firmware for consumer storage.
1. Processor still is a key part of the overall
architecture. However, the new applications,
particularly the media applications, have unique
and stringent requirements such as low jitter and
high QoS. The common single core processors
simply cannot meet these requirements effectively
regardless of how fast the processor clock is
running. On the other hand, the dual core
architecture has significant advantages in
ƒ Simultaneously running multiple applications
ƒ Performance intensive applications
ƒ Multi-threading kernels such as Linux
ƒ Flexibility in processor resource allocation.
For example, each core could be dedicated to
specific application or load-sharing and
ƒ Independent I & D cache reduces cache
pollution improved power/performance ratio
particularly in media application processing
Figure 2: NAS 7820 architecture overview
2. Application specific hardware offload engine. The
PLX NAS 7820/1 has taken this approach to the
next level. By analyzing the performance funnel,
and indentifying key areas and applications with
© PLX Technology,
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NAS 7820/1, Next Generation Media Networked Storage Solution
Full Feature-Set
The PLX NAS 7820/1 has rich feature-set. Here is a
features summary:
ƒ Highly integrated consumer NAS SoC for the
lowest BOM cost
ƒ Unique Trident architecture including dualcore ARM 11 MP each core running at 750
MHz, application specific hardware engines
for networking, storage, and security, and
highly structured firmware
ƒ Hardware security engine with AES-128/256
bit based encryption with hashing function
support for fast and secure connection and
enhanced security
ƒ 8 channel DMA controller
ƒ 64-bit wide internal bus
ƒ 1* or 2 integrated SATA3G/s ports with
hardware RAID 0 and RAID 1 engine
ƒ SPI serial NOR flash and SLC and MLC
NAND support
ƒ Flexible boot modes:
ƒ Direct from HDD (no flash needed) for low
BOM cost
ƒ Integrated fan controller and PWM
ƒ Full set of interfaces including RGMII,
2xUSB2.0 H/D, UART, JTAG, and 1xPCIe
ƒ In order to provide the best class of
applications, PLX has partnered with the key
leading application vendors. These
applications are fully tested and integrated so
each one could be independently offered
based on the marketing and product
requirements of each customer.
Software Development Kit (SDK)
ƒ Advanced software development tools
including source package and script for Linux
kernel, bootloader, root file system, and web
ƒ Compliers, drivers, and complete
ƒ Full source code to facilitate product
differentiate and customization by enabling
vendors to modified supplied modules or
create new functional modules
ƒ Complete turn-key solution for fast time-tomarket
ƒ Rich third party application environment for
media serving (uPnP and DLNA compatible),
content management, back-up, remote
management, and many more
Additional PLX Advantages
Complete Rapid Development Kits (RDK)
PLX NAS solution delivers the complete
development package:
ƒ Development board for product demo and
rapid product development
ƒ Reference design schematics for reduced timeto-market
Superior storage expertise
Custom support team for each customer for
fast time to-market
Turn-key SDK with full feature set
Schematic and Layout Design Reviews
24/7 Technical Support:
© PLX Technology,
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