LTC5800-IPR View Datasheet(PDF) - Linear Technology
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Description
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LTC5800-IPR Datasheet PDF : 28 Pages
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Advanced Information
2.8.2
Sleep
The SLEEPn digital interrupt enables an external controller to temporarily disable Eterna’s duty cycling between active and
Doze states (see Section 4.0 for state definitions). Forcing Eterna to the Doze state should only be done when absolutely
necessary, such as when taking a very sensitive sensor reading, as forcing a device into a Doze state will on the average
increase the energy consumption of other devices in the network. When SLEEPn is asserted the software will go into a Doze
state until the SLEEPn signal is negated. For details on the timing associated with SLEEPn, see Section 8.11.
2.10
Flash Programming
Eterna’s software images are loaded via the IPCS, in-circuit programming control system, SPI interface. Sequencing of
RESETn and FLASH_P_ENn, as described in Section 4.0, places Eterna in a state emulating a serial flash to support in-
circuit programming. Hardware and software for supporting development and production programming of devices is
described in 040-0110 Eterna Serial Programmer Guide. The serial protocol, SPI, and timing parameters are described in
Section 8.13.
3.0 SmartMesh Intelligent Networking Platform
The SmartMesh Eterna network manager is built upon Dust Networks’ Intelligent Networking Platform, which provides
dynamic network optimization, deterministic power management, intelligent routing, and bandwidth flexibility to achieve the
carrier class data reliability, and ultra-low power and ease of use required for industrial automation applications.
3.1
Dynamic Network Optimization
Dynamic network optimization allows Eterna to address the changing RF requirements in harsh industrial environments
resulting in a network that is continuously self-monitoring and self-adjusting. The manager performs dynamic network
optimization based upon periodic reports on network health and link quality that it receives from the network motes. The
manager uses this information to provide performance statistics to the application layer and proactively solve problems in the
network. Dynamic network optimization not only maintains network health, but also allows Eterna to deliver deterministic
power management.
3.2
Deterministic Power Management
Deterministic power management balances traffic in the network by diverting traffic around heavily loaded motes (for
example, motes with high reporting rates). In doing so, it reduces power consumption for these motes and balances power
consumption across the network. Deterministic power management provides predictable maintenance schedules to prevent
down time and lower the cost of network ownership. When combined with field devices using Eterna’s industry-leading low
power radio technology, deterministic power management enables over a decade of battery life for network motes.
3.3
Intelligent Routing
Intelligent routing provides each packet with an optimal path through the network. The shortest distance between two points
is a straight line, but in RF the quickest path is not always the one with the fewest hops. Intelligent routing finds optimal
paths by considering the link quality (one path may lose more packets than another) and the retry schedule, in addition to the
number of hops. The result is reduced network power consumption, elimination of in-network collisions, and unmatched
network scalability and reliability.
3.4
Bandwidth Flexibility
Efficient use of network resources enables Dust Networks to deliver bandwidth flexibility—the ability to assign different
levels of bandwidth to satisfy unique throughput and latency requirements. Bandwidth flexibly addresses the range of latency
and throughput needs of industrial automation applications such as request/response, fast file transfer, and alerting.
Eterna Datasheet
Linear Technology / Dust Networks
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