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PDF LTP5902-IPR Data sheet ( Hoja de datos )
| Número de pieza | LTP5902-IPR | |
| Descripción | 2.4GHz 802.15.4 Eterna Embedded Network Manager | |
| Fabricantes | Linear Technology | |
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Advanced Information
S m a r t M e s h® I P
LTP5901/LTP5902-IPR
2.4 GHz 802.15.4 EternaTM Embedded Network Manager
About SmartMesh IP
Dust Networks’ new standards-based SmartMesh® IP product line achieves unsurpassed levels of networking resilience and reliability, with
advanced network management and comprehensive security. Based on Dust’s breakthrough Eterna™ SoC technology, SmartMesh IP
enables up to 8 times lower power consumption than competing solutions even in harsh, dynamically changing RF environments. Cost
effective, IP (Internet Protocol) compatible, and widely applicable, SmartMesh IP serves an extensive range of applications, such as energy
management, building automation, renewable energy, and other implementations in smart infrastructure that call for ultra low power.
Product Descriptions – LTP5901/LTP5902-IPR
Based on the IETF 6LoWPAN and IEEE 802.15.4e Standards, the LTP5901/LTP5902-IPR SmartMesh IP embedded network manager
anchors the SmartMesh IP product line. It serves not only as a wireless-to-wired access point, but more importantly provides the core
networking functionality, enabling the network to achieve unsurpassed levels of resiliency, reliability, and scalability. The
LTP5901/LTP5902-IPR continuously optimizes the network and provides robustness in the face of constantly changing RF environments.
Furthermore, the network manager’s load balancing algorithms add more bandwidth for the busiest motes while maintaining traffic flow
for the rest of the network.
The LTP5901/LTP5902-IPR embedded network manager comes in an easy-to-integrate surface-mount printed circuit board (PCB) module
incorporating the LTC5800-IPR embedded network manager-on-chip. The LTP5901-IPR module includes an on-board chip antenna, while
the LTP5902-IPR module includes an MMCX antenna connector. Both PCB modules will come with modular certifications for FCC, IC,
and CE. As part of the SmartMesh IP system, the LTP5901/LTP5902-IPR enables customers to integrate a standards-based wireless
network into sensors and actuators to provide scalable bidirectional communications.
The manager offers a comprehensive application programming interface (API) via a UART interface, providing full visibility and control
over network configuration, security administration, network status, and performance statistics. With its combination of low power,
compact easy-to-integrate form factor, and sophisticated network management, the LTP5901/LTP5902-IPR embedded network manager is
ideally suited for deploying resilient, reliable mesh networks in a wide variety of environments and applications.
Key Product Features
SmartMesh IP Mesh Networking Performance
• Advanced network management—dynamically optimizes
mesh connectivity based on the changing RF environment
• Load balancing & optimization—adds bandwidth for the
busiest motes while maintaining normal traffic flow for the
rest of network
• Intelligent power management—balances traffic so that
power consumption is also balanced within the network
• Battery powered routers
• Auto-forming, self-healing, self-sustaining—automatically
configures and maintains the network without requiring on-
site wireless expertise.
• Compact manager design manages networks up to 32 motes
Time Synchronized Mesh Networking
• Zero collision packet exchange—for scalability and
efficiency
• Time-synchronized channel hopping seamlessly
compensates for in band blocking and multipath fading in
dynamic RF environments
• Highly Accurate Time Stamping
Full Application Flexibility
• Dynamic bandwidth—creates temporary high bandwidth
“pipes”
• Low latency mode—mode for fastest packet
Ultra-low Power Operation
• Industry-leading radio technology capable of line-powered,
battery-powered, or energy-scavenging operation
IP Standards Compliance
• Compliant to IETF 6LoWPAN and IEEE 802.15.4e standards
Easy to Integrate and Deploy
• Fully engineered RF transceiver, with power amplifier (PA),
integrated balun, and antenna matching circuitry
• Comprehensive APIs provide rich and flexible functionality to
ease software development and device integration
Secure Global Market Solution
• Operates on 2.4 GHz global license-free band, providing
customers with a single product for world-wide use
• RF modular certifications (pending)—FCC, IC and CE
• AES-128 bit encryption
Linear Technology / Dust Networks
1 page  
Advanced Information
2.0 Introduction
Eterna is the world’s most energy-efficient IEEE 802.15.4 compliant platform enabling battery and energy harvested
endpoint, routing and network management solutions. With a powerful 32-bit ARM® Cortex™-M3, best in class radio, flash,
RAM and purpose-built peripherals, Eterna provides a flexible, scalable and robust networking solution for applications
demanding both minimal energy consumption and data reliability in even the most challenging RF environments.
Shown in Figure 1, Eterna integrates purpose-built peripherals that excel in both low operating-energy consumption and the
ability to rapidly and precisely cycle between operating and low-power states. Items in the shaded region correspond to the
analog/RF components.
32 kHz
SRAM
72 KB
Flash
512 KB
Flash
Controller
Code
Cortex-M3
System
Timers
Sched.
PMU /
Clock
Control
AES
Auto
MAC
IPCS
SPI
Slave
CLI
UART
(2 pin)
API
UART
(6-pin)
802.15.4
Mod
802.15.4
Framing
DMA
32 kHz, 20 MHz
Primary
DC/DC
Converter
Relaxation
Oscillator
PoR
PA
DC/DC
Converter
Voltage Reference
Core Regulator
Clock Regulator
Analog Regulator
DAC LPF
PA
PLL
802.15.4
Demod
ADC
ADC
Ctrl.
10-bit
ADC
Limiter BPF
PPF LNA
AGC
RSSI
VGA S
PTAT
4-bit
DAC
Bat.
Load
Figure 1 Eterna Block Diagram
2.1 Power Supply
Eterna is powered from a single pin, VSUPPLY, which powers the I/O cells and is also used to generate internal supplies.
Eterna’s two on-chip DC/DC converters minimize Eterna’s energy consumption while the device is awake. To prevent power
from being wasted the DC/DC converter is disabled when the device is in low-power state. Eterna’s rejection of supply noise
is substantial owing to the two integrated DC/DC converters and three integrated low-dropout regulators. Eterna’s operating
supply range is high enough to support direct connection to Li-SClO2 sources and wide enough to support battery operation
over a broad temperature range.
Eterna Datasheet
Linear Technology / Dust Networks
5
5 Page 
Advanced Information
4.2 Serial Flash Emulation
When both RESETn and FLASH_P_ENn are asserted, Eterna disables normal operation and enters a mode to emulate the
operation of a serial flash. In this mode, its flash can be programmed with software updates. For details, see Section 2.10.
4.3 Operation
Once Eterna has completed startup, Eterna transitions to the Operational group of states (active / CPU active, active / CPU
inactive, and Doze). There, Eterna cycles between the various states, automatically selecting the lowest power state possible
while fulfilling the demands of network operation.
4.3.1
Active State
In Active state, Eterna’s relaxation oscillator is running and peripherals are enabled as needed. The ARM Cortex-M3 cycles
as needed between CPU-active and CPU-inactive (referred to in the ARM Cortex-M3 literature as “Sleep Now” or “Sleep on
Exit” modes). Eterna’s extensive use of DMA and intelligent peripherals that can independently move Eterna between the
Active and Doze states minimizes the time the CPU is active, significantly reducing Eterna’s energy consumption.
4.3.2
Doze State
The Doze state consumes orders of magnitude less current than the Active state (see Table 6) and is entered when all of the
peripherals, save the low power portion of the timer module, and the CPU are inactive. In the Doze state Eterna’s full state is
retained and Eterna is configured to detect, wake, and rapidly respond to activity on I/Os (such as UART signals and the
TIMEn pin). The Doze state also uses the 32.768-kHz oscillator and 32 kHz based timers are active.
4.4 Duty Cycling and Autonomous Peripherals
Eterna’s ability to quickly and efficiently transition between Doze and Active states, in conjunction with the ability of
peripherals to operate autonomously for most operations (shown in Figure 9), enables the system solution to significantly
reduce power consumption. For example the system can automatically go from Doze to Active and determine if RF energy is
present. The CPU is then only woken if a packet is detected, otherwise Eterna returns to Doze mode.
Figure 9 Low Energy Duty Cycling
Eterna Datasheet
Linear Technology / Dust Networks
11
11 Page | ||
| Páginas | Total 29 Páginas | |
| PDF Descargar | [ Datasheet LTP5902-IPR.PDF ] | |
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