LTP5901-WHM/LTP5902-WHM
SmartMesh WirelessHART Node
Wireless Mote Module
neTwork FeaTures
n
DescripTion
SmartMesh WirelessHART wireless sensor networks are
self managing, low power networks built from wireless
nodes called motes. The
LTP™5901-WHM/LTP5902-WHM
is the WirelessHART mote product in the Eterna
®
* family
of IEEE 802.15.4 printed circuit board assembly solutions,
featuring a highly-integrated, low power radio design by
Dust Networks
®
as well as an ARM Cortex-M3 32-bit
microprocessor running Dust’s embedded SmartMesh
WirelessHART networking software. Both the LTP5901-
WHM (with chip antenna), at 24mm
×
42mm, and the
LTP5902-WHM (with MMCX connector), at 24mm
×
37mm,
are designed for surface mount assembly.
With Dust’s time-synchronized WirelessHART networks, all
motes in the network may route, source or terminate data,
while providing many years of battery powered operation.
The SmartMesh WirelessHART software provided with
the LTP5901/2-WHM is fully tested and validated, and is
readily configured via a software Application Programming
Interface (API).
SmartMesh WirelessHART motes deliver a highly flexible
network with proven reliability and low power performance
in an easy-to-integrate platform.
L,
LT, LTC, LTM, Eterna, SmartMesh, Linear Technology, the Linear logo, Dust and Dust
Networks are registered trademarks and LTP and the Dust Networks logo are trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners. Protected by U.S. Patents, including 7375594, 7420980, 7529217, 7791419, 7881239,
7898322, 8222965.
* Eterna is Dust Networks’ low power radio SoC architecture.
n
n
n
Complete
Radio Transceiver, Embedded Processor,
and
Networking Software
for Forming a Self-Healing
Mesh Network
Compliant to WirelessHART (IEC62591) Standard
SmartMesh
®
Networks Incorporate:
n
Time synchronized Network-Wide Scheduling
n
Per Transmission Frequency Hopping
n
Redundant Spatially Diverse Topologies
n
Network-Wide Reliability and Power Optimization
n
NIST Certified Security
SmartMesh Networks Deliver:
n
>99.999% Network Reliability Achieved in the
Most Challenging Dynamic RF Environments Often
Found in Industrial Applications
n
Sub 50µA Routing Nodes
lTp5901/2-wHM FeaTures
n
n
n
Industry-leading low power radio technology with:
n
4.5mA to receive a packet
n
5.4mA to transmit at 0dBm
n
9.7mA to transmit at 8dBm
RF modular certifications include USA, Canada, EU,
Japan, Taiwan, Korea, India, Australia and New Zealand
PCB assembly with chip antenna (LTP5901-WHM)
or with MMCX antenna connector (LTP5902-WHM).
QFN version (LTC
®
5800-WHM) available
Typical applicaTion
LTP5901-WHM
EXPANDED VIEW
MOTE
LTP5903-WHR
ANTENNA
IN+
SENSOR
LTC2379-18 SPI
IN–
MOTE
MOTE
MOTE
59012whm TA01
MANAGER
MOTE
µCONTROLLER
UART
UART
ETHERNET
HOST
APPLICATION
59012whmfa
For more information
www.linear.com/LTP5901-WHM or www.linear.com/LTP5902-WHM
1
LTP5901-WHM/LTP5902-WHM
Table oF conTenTs
Network Features .......................................... 1
LTP5901/2-WHM FEATURES .............................. 1
Typical Application ........................................ 1
Description.................................................. 1
Smartmesh Network Overview........................... 3
Absolute Maximum Ratings .............................. 4
Pin Configuration .......................................... 4
Order Information .......................................... 5
Recommended Operating Conditions ................... 5
DC Characteristics ......................................... 5
Radio Specifications ...................................... 6
Radio Receiver Characteristics .......................... 6
Radio Transmitter Characteristics ....................... 7
Digital I/O Characteristics ................................ 7
Temperature Sensor Characteristics .................... 8
Analog Input Chain Characteristics ..................... 8
System Characteristics ................................... 8
UART AC Characteristics.................................. 9
TIMEn AC Characteristics ................................ 10
Radio Inhibit AC Characteristics........................ 10
Flash AC Characteristics ................................. 11
Flash SPI Slave AC Characteristics .................... 11
Typical Performance Characteristics .................. 13
Pin Functions .............................................. 17
Operation................................................... 21
Power Supply.......................................................... 21
Supply Monitoring and Reset ................................. 21
Precision Timing ..................................................... 21
Application Time Synchronization ..........................23
Time References .....................................................23
Radio ......................................................................23
UARTs .....................................................................23
Autonomous MAC................................................... 24
Security ..................................................................25
Temperature Sensor ...............................................25
Radio Inhibit ...........................................................25
Software Installation...............................................25
Flash Data Retention ...............................................25
State Diagram .........................................................26
Applications Information ................................ 28
Regulatory and Standards Compliance ................... 28
Soldering Information ............................................. 28
Related Documentation .................................. 28
Package Description ..................................... 29
Revision History .......................................... 31
Typical Application ....................................... 32
Related Parts .............................................. 32
59012whmfa
2
For more information
www.linear.com/LTP5901-WHM or www.linear.com/LTP5902-WHM
LTP5901-WHM/LTP5902-WHM
sMarTMesH neTwork overview
A SmartMesh network consists of a self-forming multi-hop,
mesh of nodes, known as motes, which collect and relay
data, and a Network Manager that monitors and manages
network performance and security, and exchanges data
with a host application.
SmartMesh networks communicate using a Time Slotted
Channel Hopping (TSCH) link layer, pioneered by Dust
Networks. In a TSCH network, all motes in the network
are synchronized to within less than a millisecond. Time
in the network is organized into timeslots, which enables
collision-free packet exchange and per-transmission
channel-hopping. In a SmartMesh network, every device
has one or more parents (e.g. mote 3 has motes 1 and
2 as parents) that provide redundant paths to overcome
communications interruption due to interference, physical
obstruction or multi-path fading. If a packet transmission
fails on one path, the next retransmission may try on a
different path and different RF channel.
A network begins to form when the network manager instructs
its on-board Access Point (AP) radio to begin sending ad-
vertisements - packets that contain information that enables
a device to synchronize to the network and request to join.
This message exchange is part of the security handshake
that establishes encrypted communications between the
manager or application, and mote. Once motes have joined
the network, they maintain synchronization through time
corrections when a packet is acknowledged.
HOST
APPLICATION
The Network Manager uses health reports to continually
optimize the network to maintain >99.999% data reliability
even in the most challenging RF environments.
The use of TSCH allows SmartMesh devices to sleep in-
between scheduled communications and draw very little
power in this state. Motes are only active in timeslots
where they are scheduled to transmit or receive, typically
resulting in a duty cycle of < 1%. The optimization soft-
ware in the Network Manager coordinates this schedule
automatically. When combined with the Eterna low power
radio, every mote in a SmartMesh network – even busy
routing ones – can run on batteries for years. By default,
all motes in a network are capable of routing traffic from
other motes, which simplifies installation by avoiding the
complexity of having distinct routers vs. non-routing end
nodes. Motes may be configured as non-routing to further
reduce that particular mote’s power consumption and to
support a wide variety of network topologies.
ALL NODES ARE ROUTERS.
THEY CAN TRANSMIT AND RECEIVE.
THIS NEW NODE CAN JOIN
ANYWHERE BECAUSE ALL
NODES CAN ROUTE.
SNO 02
NETWORK MANAGER
AP
Mote
1
Mote
2
Mote
3
SNO 01
An ongoing discovery process ensures that the network
continually discovers new paths as the RF conditions
change. In addition, each mote in the network tracks per-
formance statistics (e.g. quality of used paths, and lists of
potential paths) and periodically sends that information
to the network manager in packets called health reports.
At the heart of SmartMesh motes and network manag-
ers is the Eterna IEEE 802.15.4e System-on-Chip (SoC),
featuring Dust Networks’ highly-integrated, low power
radio design, plus an ARM Cortex-M3 32-bit micropro-
cessor running SmartMesh networking software. The
SmartMesh networking software comes fully compiled
yet is configurable via a rich set of Application Program-
ming Interfaces (APIs) which allows a host application
to interact with the network, e.g. to transfer information
to a device, to configure data publishing rates on one or
more motes, or to monitor network state or performance
metrics. Data publishing can be uniform or different for
each device, with motes being able to publish infrequently
or faster than once per second as needed.
59012whmfa
For more information
www.linear.com/LTP5901-WHM or www.linear.com/LTP5902-WHM
3
LTP5901-WHM/LTP5902-WHM
absoluTe MaxiMuM raTings
(Note 1, Note 2)
Supply Voltage on VSUPPLY ..................................4.20V
Input Voltage on AI_0/1/2/3 Inputs .........................1.98V
Voltage on any Digital I/O Pin .... –0.3V to VSUPPLY +0.3V
Input RF Level ......................................................10dBm
Storage Temperature Range (Note 3)..... –55°C to 105°C
Operating Temperature Range
LTP5901I/LPT5902I .............................–40°C to 85°C
CAUTION: This part is sensitive to electrostatic discharge
(ESD). It is very important that proper ESD precautions be
observed when handling the LTP5901/LTP5902-WHM.
pin conFiguraTion
Pin functions shown in italics are currently not supported in software.
GND
RESERVED
NC
GPIO17
GPIO18
GPIO19
AI_2
AI_1
AI_3
AI_0
GND
RESERVED
NC
NC
RESETn
TDI
TDO
TMS
TCK
GND
DP4 (GPIO23)
RESERVED
RESERVED
RESERVED
DP3 (GPIO22)
/ TIMER8_IN
DP2 (GPIO21)
/ LPTIMER_IN
SLEEPn / GPIO14
DP0 (GPIO0) / SPIM_SS_2n
NC
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 32 33
UARTCO_TX
UARTCO_RX
IPCS_MISO / GP106
34 35 36
GND
IPCS_MOSI / GPIO5
IPCS_SCK / GPIO4
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
GND
NC
RADIO_INHIBIT
/ GPIO15
TIMEn
/ GPIO1
UART_TX
UART_TX_CTSn
UART_TX_RTSn
UART_RX
UART_RX_CTSn
UART_RX_RTSn
GND
VSUPPLY
RESERVED
NC
NC
FLASH_P_ENn
/ GPIO2
SPIS_SSn / SDA
SPIS_SCK / SCL
SPIS_MOSI /
GPIO26
/ UARTC1_RX
SPIS_MISO / 1_WIRE / UARTC1_TX
PWM0 / GPIO16
DP1 (GPIO20)
/ TIMER16_IN
SPIM_SS_0n / GPIO12
SPIM_SS_1n / GPIO13
GND
SPIM_SCK / GPIO9
SPIM_MOSI / GPIO10
IPCS_SSn / GPIO3
SPIM_MISO / GPIO11
GND
PC PACKAGE
66-LEAD PCB
59012whmfa
4
For more information
www.linear.com/LTP5901-WHM or www.linear.com/LTP5902-WHM
LTP5901-WHM/LTP5902-WHM
orDer inForMaTion
LEAD FREE FINISH†
LTP5901IPC-WHMA#PBF
LTP5902IPC-WHMA#PBF
PART MARKING*
LTP5901IPC-WHMA#PBF
LTP5902IPC-WHMA#PBF
PACKAGE DESCRIPTION
66-Lead (42mm
×
24mm
×
5.5mm) PCB with Chip Antenna
66-Lead (37.5mm
×
24mm
×
5.5mm) PCB with MMCX
Connector
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
†This product ships with the flash erased at the time of order. OEMs will need to program devices during development and manufacturing.
For legacy part numbers and ordering information go to:
http://www.linear.com/LTP5901-WHM#orderinfo or
http://www.linear.com/LTP5902-WHM#orderinfo
*The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
The
l
denotes the specifications which apply
over the full operating temperature range, otherwise specifications are at T
A
= 25°C and VSUPPLY = 3.6V unless otherwise noted.
SYMBOL PARAMETER
VSUPPLY Supply Voltage
Supply Noise
Operating Relative Humidity
Temperature Ramp Rate
CONDITIONS
Including Noise and Load Regulation
50Hz to 2MHz
Non-Condensing
While Operating in Network
l
l
l
l
recoMMenDeD operaTing conDiTions
MIN
2.1
10
–8
TYP
MAX
3.76
250
90
8
UNITS
V
mV
%RH
°C/Min
Dc cHaracTerisTics
OPERATION/STATE
Power-on Reset
Doze
Deep Sleep
In-circuit Programming
Peak Operating Current
+8dBm
+0dBm
Active
The
l
denotes the specifications which apply over the full operating temperature range,
otherwise specifications are at T
A
= 25°C and VSUPPLY = 3.6V unless otherwise noted.
CONDITIONS
During Power-on Reset, Maximum 750µs + VSUPPLY Rise
Time from 1V to 1.9V
RAM on, ARM Cortex-M3, Flash, Radio, and Peripherals Off,
All Data and State Retained, 32.768kHz Reference Active
RAM on, ARM Cortex-M3, Flash, Radio, and Peripherals Off,
All Data and State Retained, 32.768kHz Reference Inactive
RESETn and FLASH_P_ENn Asserted, IPCS_SCK at 8MHz
System Operating at 14.7MHz, Radio Transmitting, During
Flash Write. Maximum duration 4.33 ms.
ARM Cortex M3, RAM and Flash Operating, Radio and All
Other Peripherals Off. Clock Frequency of CPU and Peripherals
Set to 7.3728MHz, VCORE = 1.2V
Single Bank Flash Write
Single Bank Page or Mass Erase
Current With Autonomous MAC Managing Radio Operation,
CPU Inactive. Clock Frequency of CPU and Peripherals Set to
7.3728MHz.
Current With Autonomous MAC Managing Radio Operation,
CPU Inactive. Clock Frequency of CPU and Peripherals Set to
7.3728MHz.
MIN
TYP
12
1.2
0.8
20
30
26
1.3
MAX
UNITS
mA
µA
µA
mA
mA
mA
mA
Flash Write
Flash Erase
Radio Tx
+0dBm
+8dBm
Radio Rx
3.7
2.5
5.4
9.7
4.5
mA
mA
mA
mA
mA
59012whmfa
For more information
www.linear.com/LTP5901-WHM or www.linear.com/LTP5902-WHM
5
