ZigBit™ 900 is an ultra-compact, exte nded range, low-power, high-sens itivity 784/868/915 MHz
IEEE 802.15.4/ZigBee
It is designed for wireless sensing, control and data acquisition applications. ZigBit modules eliminate
the need for costly and ti me-consum ing RF dev elopment, and sho rtens time t o market for a wide ran ge
of wireless applications.
This module is the latest addition to the ZigBit family also represented by 2.4 GHz modules ATZB- 24A2/B0 [1], and ATZB-A24-UFL/U0 [3].
1.2Applications
ZigBit 900 module is compatible with robust IEEE 802.15.4/ZigBee stack that supports a self-healing,
self-organizing mesh network, while optimizing network traffic and minimizing power consumption. Atmel
offers two stack configurations: BitCloud and SerialNet. BitCloud is a ZigBee PRO certified software
development platform supporting r eliab le, s calab le, a nd secure wireless applications running on Atmel’s
ZigBit modules. SerialNet allows programming of the module via serial AT-command interface.
The applications include, but are not limited to:
•
Building automation & monitoring
– Lighting controls
– Wireless smoke and CO detectors
– Structural integrity monitoring
• HVAC monitoring & control
• Inventory management
• Environmental monitoring
• Security
• Water metering
• Industrial monitoring
– Machinery condition and performance monitoring
– Monitoring of plant system parameters such as temperature, pressure, flow, tank level, humidity,
vibration, etc.
• Automated meter reading (AMR)
®
OEM module, based on the innovative Atmel’s mixed-signal hardware platform.
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1.3Key Features
• Ultra compact size (18.8 x 13.5 mm)
• High RX sensitivity (-110 dBm)
• Outperfor ming link budget (120 dB)
• Up to 11 dBm output power
• Very low power consumption (< 6 µA in Sleep mode)
• Wide range of interfaces (both analog and digi tal):
– 9 spare GPIO, 2 spare IRQ lines
– 4 ADC lines + 1 line for supply voltage control (up to 9 lines with JTAG disabled)
– UART with C TS/RTS control
–USART
2
–I
– SPI
–1-Wire
– Up to 30 lines configurable as GPIO
• Capability to write own MAC address into the EEPROM
• Optional antenna reference designs
• IEEE 802.15.4 compliant transceiver
• 868 / 915 MHz band
• 784 MHz Chinese band
• BitCloud embedded software, including serial bootloader and AT command set
Introduction
C
1.4Benefits
• Over 6 km (4 miles) outdoor line-of-sight range
• Small physical footprint and low profile for optimum fit in even the smallest of devices
GPIOGeneral Purpose Input/Output
HVACHeating, Ventila ting and Air Conditioning
HWHardware
2
CInter-Integrated Circuit
I
IEEEInstitute of Electrical and Electrionics Engineers
IRQInterrupt Request
ISMIndustrial, Scientific and Medical radio band
JTAG
MACMedium Access Contro l layer
MCU
O-QPSKOffset Quadrature Phase-Shift Keying modulation scheme
OEMOriginal Equipment Manufacturer
OTAOver-The-Air u pgrade
PCBPri nte d Circuit Board
PERPackage Error Ratio
Digital interface for debugging of embedded device, also known as IEEE 1149.1 standard
interface
Microcontroller Unit. In this document it also means the processor, which is the core of ZigBit
module
Introduction
RAMRandom Access Memory
RFRadio Frequency
RTS/CTSRequest to Send/ Clear to Send
RXReceiver
SMASurface Mount Assembly
SPISerial Peripheral Interface
SWSoftware
TTMTime To Market
TXTransmitter
UARTUniversal Asynchronous Receiver/Transmitter
USARTUniversal Synchronous/Asynchronous Receiver/Transmitter
USBUniversal Serial Bus
ZDKZigBit Development Kit
ZigBee,
ZigBee PRO
802.15.4The IEEE 802.15.4-2006 standard applica ble to low-rate wireless Personal Area Network
Wireless networking standards targeted at low-power applications
[5] Atmel AT86RF212 Low Power 800/900 MHz Transceiver for IEEE 802.15 . 4b , Zigbee, an d ISM Applications. Preliminary specification
[6] Ultra Small Surface Mount Coaxial Connectors - Low Profile 1.9mm or 2.4mm Mated Height.
http://www.hirose.co.jp/cataloge_hp/e32119372.pdf
[7] ZigBit 900 Development Kit. User's Guide. MeshNetics Doc. S-ZDK-451~03 TBD
[8] IEEE Std 802.15.4-2006 IEEE Standard for Information technology - Part 15.4 Wireless Medium
Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area
Networks (LR-WPANs)
[9] ZigBee Specification. ZigBee Document 053474r17, October 19, 2007
[10] BitCloud™ IEEE 802.15.4/ZigBee Software. AVR2050: BitCloud User Guide. Atmel’s doc8199.pdf
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2.1Overview
ZigBit 900 is an extended-range low-power, a low-power, high-sensitivity IEEE 802.15.4/ ZigBee-compliant OEM module, which occupies less than a square inch. Based on a solid combination of Atmel’s latest
MCU Wireless hardware platform [5], power amplifier and low-noise amplifier, the ZigBit 900 offers superior radio performance, ultra-low power consumption and exceptional ease of integration.
Figure 2-1. ATZB-900-B0 Block Diagram
Section 2
Zigbit™700/800/900 MHz Wireless Modules Overview
ZigBit 900 contains Atmel’s ATme ga1281V Mic rocontroller [4] an d AT86RF212 R F Transcei ver [5]. T he
module features 128 Kbytes flash memory and 8 Kbytes RAM.
The ZigBit 900 already contains a complete RF/MCU-related design with all the necessary passive components included. The module can be easily mounted on a simple 2-layer PCB with a minimum of
required external connection. Compared to a custom RF/MCU design, a module-based solution offers
considerable savings in development time and NRE cost per unit during the design, prototyping, and
mass production phases of pro du c t development.
To jumpstart evaluation and development, Atmel also offers a complete set of eva luation and development tools. The new ZigBit 900 Development Kit [7] comes with everything you need to create custom
applications featuring ZigBit 900 module.
The kit features MeshBean development boards (ATZB-EVB-900-SMA) with an easy-to-access extension connector for attaching third party sensors and other peripherals, and a JTAG connector for easy
application uploading and debugging.
The kit also includes refere nce appl ic atio ns to speed up application development, source code for hardware interface layer and reference drivers for the all the module interfaces, intuitive development
environment from Atmel, and comprehensive set of application notes and product documentation.
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Zigbit™700/800/900 MHz Wireless Modules Overview
ZigBit 900 modules come bundled with BitCloud, a 2nd generation embedded software stack from Atmel.
BitCloud is fully compliant with ZigBee PRO and ZigBee standards for wireless sensing and control [8],
[9], [10] and it provides an augmented set of APIs which, while maintaining 100% compliance with the
standard, offer extended functionality designed with developer's convenience and ease-of-use in mind.
Depending on end-user design requirements, ZigBit 900 can operate as a self-contained sensor node,
where it would function as a single MCU, or it can be paired with a host processor driving the module
over a serial interface. In the former case, a u ser application may be used with the BitCloud softwa re
allowing customization of embedded applications through BitCloud’s C API.
In the latter case, the host processor controls data transmission and manages module perip herals via an
extensive set of SerialNet AT commands. Thus, no firmware customization is required for a successful
module design-in. Additionally, third-party sensors can be connected directly to the module, thus
expanding the existing set of peripheral interfaces.
ZigBit™ 700/800/900 MHz Wireless Modules2-2
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3.1Electrical Characteristics
3.1.1Absolute Maximum Ratings
Section 3
Specifications
Table 3-1. Absolute Maximum Ratings
Voltage on any pin, except RESET with respect to Ground-0.5VV
DC Current per I/O Pin40 mA
DC Current DVCC and DGND pins300 mA
Input RF Level+5 dBm
Notes:1. Absolute Maximum Ratings are the values beyond which damage to the device may occur. Under no
3.1.2Test Conditions
Table 3-2. Test conditions (unless otherwise stated), VCC=3V, T
(1)(2)
ParametersMinMax
+0.5V
CC
circumstances must the absolute maximum ratings given in this table be violated. Stresses beyond
those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
This is a stress rating only. Functional operation of the device at these or other conditions, beyond those
indicated in the operational sections of this specification, is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect device reliability.
2. Attention! ZigBit 900 is an ESD-sensitive device. Precaution should be taken when handling the device
in order to prevent permanent damage.
=25C
amb
ParametersConditionRangeUnit
Supply Voltage, V
Current Consumption: RX mode
Current Consumption: TX mode
Current Consumption: Power-save mode
Note:1. Preliminary data
CC
(1)
(1)
PTX = 5 dBm20mA
(1)
1.8 to 3.6V
15mA
6µA
Current consumption actually depends on multi ple fact ors, incl uding but not limited to, the b oard desig n
and materials, BitCloud settings, network activity, EEPROM read/write operations. It also depends on
MCU load and/or peripherals used by an application.
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3.1.3RF Characteristics
Table 3-3. RF Characteristics
Frequency Band
Number of Channels15
Channel Spacing2MHz
Transmitter Output Power-11 to +11dBm
Receiver SensitivityAWGN channel, PER = 1%
20 kbit/s
40 kbit/s
100 kbit/s
250 kbit/s
200 kbit/s
400 kbit/s-90
500 kbit/s-97
1000 kbit/s-92
ADC Input Resistance>1M
ADC Reference Voltage (VREF)1.0 to VCC-3V
ADC Input Vo ltage0 - VREFV
I2C Maximum Clock222kHz
GPIO Output Voltage (High/Low)-10/ 5 mA, V
Real Time Oscillator Frequency32.768kHz
In the single
conversion mo de
=3V2.3/ 0.5V
CC
Specifications
10/200Bits/µs
3.2Physical/Environmental Characteristics and Outline
ParametersValueComments
Size18.8 x 13.5 x 2.0 mmATZB-900-B0
Operating Temperature Range-20
Operating Relative Humidity Rangeno more than 80%
Note:1. Minor degration of clock stability may occur.
Figure 3-1. ATZB-900-B0 Mechanical drawing
C to +70 C-40C to +85 C operational
(1)
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3.3Pin Configuration
Figure 3-2. ATZB-900-B0 Pinout
Specifications
Table 3-6. Pin descriptions
Connector
PinPin NameDescriptionI/O
1SPI_CLKReserved for stack operation
2SPI_MISOReserved for stack operation
3SPI_MOSIReserved for stack operation
4GPIO0General Purpose digital Input/Output 0
5GPIO1General Purpose digital Input/Output 1
6GPIO2General Purpose digital Input/Output 2
7OSC32K_OUT32.768 kHz clock output
8RESETReset input (active low)
9,22,23DGNDDigital Ground
RF clock output. When module is in active state,
10CPU_CLK
11I2C_CLKI
12I2C_DATAI
13UAR T_TXDUART transmit out put
14UART_RXDUART receive input
4 MHz signal is present on this line. While module
is in the sleeping state, clock generation is also
stopped
2
C serial clock output
2
C serial clock input/output
(4)
.
(1)(2)(3)(4)(7)
(1)(2)(3)(4)(7)
(4)
(4)
(4)
(2)(3)(4)(7)
(2)(3)(4)(7)
(2)(3)(4)(7)
(4)(5)
(4)
(2)(3)(4)(7)
(2)(3)(4)(7)
Default
State after
Power on
O
I/O
I/O
I/Otri-state
I/Otri-state
I/Otri-state
O
O
Otri-state
I/Otri-state
Otri-state
Itri-state
15UART_RTS
RTS input (Request To send) for UART hardw are
flow control. Active low
(2)(3)(4)(7)
Itri-state
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Table 3-6. Pin descriptions (Continued)
Connector
PinPin NameDescriptionI/O
Specifications
Default
State after
Power on
16UART_CTS
CTS output (Clear To send) for UART hardware
flow control. Active low
(2)(3)(4)(7)
17GPIO6General Purpose digital Input/Output 6
18GPIO7General Purpose digital Input/Output 7
19GPIO3General Purpose digital Input/Output 3
20GPIO4General Purpose digital Input/Output 4
21GPIO5General Purpose digital Input/Output 5
24,25D_VCCDigital Supply Voltage (V
26JTAG_TMSJTAG Test Mode Select
27JTAG_TDIJTAG Test Data Input
28JT AG_TDOJTAG Test Data Output
29JTAG_TCKJTAG Test Clock
30ADC_INPUT_3ADC Input Channel 3
31ADC_INPUT_2ADC Input Channel 2
32ADC_INPUT_1ADC Input Channel 1
33BAT
ADC Input Channel 0, used for battery level
measurement. This pin equals V
Notes:1. The UART_TXD pin is intended for input (i.e. its designation as "TXD" implies some complex system
containing ZigBit 900 as its RF terminal unit), while UART_RXD pin, vice versa, is for output.
2. Most of pins can be configured for general purpose I/O or for some alter nate function s as described in
details in the ATmega1281V Datasheet [1].
3. GPIO pins can be programmed either for output, or for input with/without pull-up resistors. Output pin
drivers are strong enough to drive LED displays directly (refer to figures on pages 387-388, [1]).
4. All digital pins are provided with protection diodes to D_VCC and DGND
ZigBit™ 700/800/900 MHz Wireless Modules3-7
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Specifications
5. It is strongly recommended to avoid assigning an alternate function for OSC32K_OUT pin because it is
used by BitCloud. However, this signal can be used if another peripheral or host processor req uires
32.768 kHz clock, otherwise this pin can be disconnecte d .
6. Normally, JTAG_TMS, JTAG_TDI, JTAG_TDO, JTAG_TCK pins are used for on-chip debugging and
flash burning. They can be used for A/D conversion if JTAGEN fuse is disabled.
7. The following pins can be configured with the BitCloud software to be general-purpose I/O lines:
GPIO0, GPIO1, GPIO2, GPIO3, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8, GPIO_1WR, I2C_CLK,
I2C_DATA, UART_TXD, UART_RXD, UART_RTS, UART_CTS, ADC_INPUT_3, ADC_INPUT_2,
ADC_INPUT_1, BAT, UART_DTR, USART0_RXD, USART0_TXD, USART0_EXTCLK, IRQ_7, IRQ_6.
Additionally, four JTAG lines can be programmed with software as GPIO as well, but this requires
changing the fuse bits and will disable JTAG debugging.
8. With BitCloud, CTS pin can be configured to indicate sleep/a ctive condition of the module thus providing mechanism for power management of host processor. If this function is necessary, connecti on of
this pin to external pull-down resistor is recommended to prevent the undesirable transients during
module reset process.
9. Using ferrite bead and 1 µF capacitor located closely to the power supply pin is recommended, as
shown below.
10.In SPI mode, USART0_EXTCLK is output. In USART mode, this pin can be configured as either input or
output pin.
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Figure 3-3. Typical Reference Schematic
Specifications
3.4Mounting Information
The below diagrams show the PCB layout recommended for ZigBit 900 module. Neither via-holes nor
wires are allowed on the PCB upper layer in area occupied by the module. As a critical requirement,
RF_GND pins should be ground ed via sev eral holes to be locat ed right n ext to the pins thus minim izing
inductance and preventing both mismatch and losses.
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Figure 3-4. ATZB-900-B0 PCB Recommended Layout, Top View
Specifications
3.5Soldering Profile
The J-STD-020C-compliant soldering profile is recommended, as given below.
Table 3-7. Soldering Profile
Average ramp-up rate (217 °C to peak)3 °C/s max.
Preheat temperature 175 °C ± 25 °C180 s max.
Temperature maintained above 217 °C60 s to 150 s
Time within 5 °C of actual peak temperature20 s to 40 s
Peak temperature range6 °C/s max.
Ramp-down rate8 minutes max.
Note:1. The package is backward compatible with Pb/Sn soldering profile
3.6Antenna Reference Design
(1)
Profile FeatureGreen Package
This section presents PCB design which may be used to combine ZigBit 900 with an external antenna
This antenna reference designs is recommended for successful design-in.
ZigBit™ 700/800/900 MHz Wireless Modules3-10
8227C–MCU Wireless–06/09
Specifications
The external antenna used for this product must provide a separation distance of at least 20 cm from all persons
and must not be colocated or operating in conjunction with any other antenna or transmitter.
Figure 3-5. FCC/CE compliant RF reference design with RP-SMA connector recommended for ATZB-900-B0
Multiple factors affect proper antenna match, hence, affecting the antenna pattern. The particular factors
are the board material and thickness, shields, the material used for enclosure, the board neighborhood,
and other components adjacent to antenna.
3.6.1General recommendations
Metal enclosure should not be used. Using low profile enclosure might also affect antenna tuning.
Placing high profile components next to antenna should be avoided.
Having holes punched around the periphery of the board eliminates parasitic radiation from the board
edges also distorting antenna pattern.
ZigBit 900 module should not be placed next to the consumer electronics which might interfere with
ZigBit 900's RF frequency band.
The board design should prevent propagation of microwave field inside the board material. Electromagnetic waves of high frequency may penetrate the board thus making the edges of the board radiate,
which may distort the antenna patt ern. To el iminate this effect, me talized a nd grounded holes must be
placed around the board's edges.
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4.1Ordering Information
Agency Certifications
Section 5
5.1 UNITED STATES (FCC)
This equipment complies with Part 15 of the FCC rules and regulations. To fulfill FCC Certification requirements, an OEM
manufacturer must comply with the following regulations:
1. The modular transmitter must be labelled with its own FCC ID number, and, if the FCC ID is not visible when the module is
installed inside another device, then the outside of the device into which the module is installed must also display a label referring to
the enclosed module. This exterior label can use wording such as the following:
Contains FCC ID: VW4A090666
The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (i.) this device may
not cause harmful interference and (ii.) this device must accept any interference received, including interference that may cause
undesired operation.
Any similar wording that expresses the same meaning may be used.
2. To be used with the ATZB900B0 module, the external antennas have been tested and approved which are specified in here
below. The ATZB900B0 Module may be integrated with other custom design antennas which OEM installer must authorize following
the FCC 15.21 requirements. If there are major deviations on the custom design antenna, then the product which carries the
ATZB900B0 module has to be recertified by the OEM of the end product.
WARNING: The Original Equipment Manufacturer (OEM) must ensure that the OEM modular transmitter must be labeled with its own
FCC ID number. This includes a clearly visible label on the outside of the final product enclosure that displays the contents shown below.
If the FCC ID is not visible when the equipment is installed inside another device, then the outside of the device into which the equipment
is installed must also display a label referring to the enclosed equipment.
IMPORTANT: This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation (FCC 15.19).
The internal / external antenna(s) used for this mobile transmitter must provide a separation distance of at least 20 cm from all persons
and must not be colocated or operating in conjunction with any other antenna or transmitter.
Installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. This device is
approved as a mobile device with respect to RF exposure compliance, and may only be marketed to OEM installers. Use in portable exposure conditions
(FCC 2.1093) requires separate equipment authorization.
IMPORTANT: Modifications not expressly approved by this company could void the user's authority to operate this equipment (FCC section 15.21).
IMPORTANT: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which
case the user will be required to correct the interference at his own expense (FCC section 15.105).
Part NumberDescription
ATZB-900-B0R
Note:1. Tape and Reel quantity: 200
(1)
Section 4
Ordering Information
783/868/915 MHz IEEE802.15.4/ZigBee Wireless Module w/ Balanced RF Port
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HeadquartersInternational
5.2. EUROPEAN UNION (ETSI)
The ATZB900B0 Modules has been certified for use in European Union countries. If the ATZB900B0 Modules are incorporated into
a product, the manufacturer must ensure compliance of the final product to the European harmonized EMC and lowvoltage/safety
standards. A Declaration of Conformity must be issued for each of these standards and kept on file as described in Annex II of the
R&TTE Directive.
Furthermore, the manufacturer must maintain a copy of the ATZB900B0 Modules documentation and ensure the final product does
not exceed the specified power ratings, antenna specifications, and/or installation requirements as specified in the user manual. If any
of these specifications are exceeded in the final product, a submission must be made to a notified body for compliance testing to all
required standards.
IMPORTANT: The 'CE' marking must be affixed to a visible location on the OEM product. The CE mark shall consist of the initials
"CE" taking the following form:
The CE marking must have a height of at least 5mm except where this is not possible on account of the nature of the apparatus.
The CE marking must be affixed visibly, legibly, and indelibly.
More detailed information about CE marking requirements you can find at "DIRECTIVE 1999/5/EC OF THE EUROPEAN PARLIAMENT
AND OF THE COUNCIL" on 9 March 1999 at section 12.
Atmel Corporation
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