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ZigBitTM 2.4 GHz Amplified Wireless Modules
...................................................................................................................
ATZB-A24-UFL/U0
Datasheet
8228B-MCU Wireless-06/09
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Table of Contents Section 1
1.1 1.2 1.3 1.4 1.5 1.6 Summary............................................................................................................................ 1-1 Applications........................................................................................................................ 1-1 Key Features...................................................................................................................... 1-2 Benefits .............................................................................................................................. 1-2 Abbreviations and Acronyms ............................................................................................. 1-2 Related Documents ........................................................................................................... 1-4
Section 2
2.1 Overview ............................................................................................................................ 2-5
Section 3
3.1 Electrical Characteristics.................................................................................................... 3-7 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.2 3.3 3.4 3.5 3.6 Absolute Maximum Ratings ................................................................................. 3-7 Test Conditions.................................................................................................... 3-7 RF Characteristics ............................................................................................... 3-8 ATmega1281V Microcontroller Characteristics ................................................... 3-8 Module Interfaces characteristics ........................................................................ 3-8
Physical/Environmental Characteristics and Outline ......................................................... 3-9 Pin Configuration ............................................................................................................. 3-10 Mounting Information ....................................................................................................... 3-14 Soldering Profile............................................................................................................... 3-14 Antenna Reference Design.............................................................................................. 3-15
Section 4
4.1 Ordering Information ........................................................................................................ 4-16
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Section 1 Introduction
1.1 Summary
ZigBitTM Am p is an ultra-comp act, extended ran ge, low-power, hig h-sensitivity 2.4GHz IEEE 802.15.4/ZigBee(R) OEM module from Atmel. Based on the innovative Atmel's mixed-signal hardware platform, this module is enhanced by an output power amplifier and an input low-noise amplifier, and is designed for wireless sensing, monitoring & control and data acquisition applications. ZigBit Amp modules eliminate the need for costly and time-consuming RF development, and shortens time to market for wireless applications with extended range requirements. Two different versions of ZigBit 2.4 GHz Amplified modules are available: ATZB-A24-UFL with built-in U.FL antenna connector and the ATZB-A24-U0 with unbalanced RF output. These modules are an addition to the ZigBit family represented by ATZB-24-A2 and ATZB-24-B0. In addition Atmel offer the ZigBit 900 MHz Wireless Module ATZB-900-B0 [2].
1.2
Applications
ZigBit module is compatible with robust IEEE 802.15.4/ZigBee stack that supports a self-healing, selforganizing 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 reliable, scalable, and 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)
* * * * * *
*
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Introduction
1.3
Key Features
* * * * *
Ultra compact size (38.0 x 13.5 x 2.0 mm) High RX sensitivity (-104 dBm) Outperforming link budget (up to 124 dB) Up to +20 dBm output power Very low power consumption: - < 6 A in Sleep mode, - 23 mA in RX mode, - 50 mA in TX mode Ample memory resources (128K bytes of flash memory, 8K bytes RAM, 4K bytes EEPROM) Wide range of interfaces (both analog and digital): - 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 CTS/RTS control - USART - I2C - SPI - 1-Wire - Up to 30 lines configurable as GPIO Capability to use MAC address written into EEPROM IEEE 802.15.4 compliant transceiver 2.4 GHz ISM band BitCloud embedded software, including serial bootloader and AT command set
* *
* * * *
1.4
Benefits
* * * * * * * * *
Extended range through additional PA and LNA Ultra low power consumption combined with unprecedented range Rapid design-in with built-in U.FL connector (ATZB-A24-UFL) Flexibility in using a different external antenna for every application Small physical footprint and low profile for optimum fit in even the smallest of devices Mesh networking capability Easy-to-use low cost Development Kit Single source of support for HW and SW Worldwide license-free operation
1.5
Abbreviations and Acronyms
ADC API DC DTR EEPROM ESD
Analog-to -Digital Converter Application Programming Interface Direct Current Data Terminal Ready Electrically Erasable Programmable Read-Only Memory Electrostatic Discharge
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Introduction
GPIO HAF HVAC HW IC IEEE IRQ ISM JTAG LNA MAC MCU NRE OEM OTA PA PCB PER RAM RF RTS/CTS RX SMA SPI SW TTM TX UART USART USB ZDK ZigBee, ZigBee PRO 802.15.4
2
General Purpose Input/Output High Frequency Heating, Ventilating and Air Conditioning Hardware Inter-Integrated Circuit Institute of Electrical and Electrionics Engineers Interrupt Request Industrial, Scientific and Medical radio band Digital interface for debugging of embedded device, also known as IEEE 1149.1 standard interface Low Noise Amplifier Medium Access Control layer Microcontroller Unit. In this document it also means the processor, which is the core of ZigBit module Network layer Non-Recurring Engineering Over-The-Air upgrade Power Amplifier Printed Circuit Board Package Error Ratio Random Access Memory Radio Frequency Request to Send/ Clear to Send Receiver Surface Mount Assembly Serial Peripheral Interface Software Time To Market Transmitter Universal Asynchronous Receiver/Transmitter Universal Synchronous/Asynchronous Receiver/Transmitter Universal Serial Bus ZigBit Development Kit Wireless networking standards targeted at low-power applications The IEEE 802.15.4-2003 standard applicable to low-rate wireless Personal Area Network
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Introduction
1.6
Related Documents
[1] ZigBitTM 2.4 GHz Wireless Modules ATZB-24-B0/A2. Product datasheet. Atmel's doc8226.pdf [2]. ZigBitTM 700/800/900 MHz Wireless Modules ATZB-900-B. Product datasheet. Atmel's doc8227.pdf [3] ZigBitTM Development Kit. User's Guide. MeshNetics Doc. S-ZDK-451~01 [4] Atmel 8-bit AVR Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash. 2549F AVR 04/06 [5] Atmel Low-Power Transceiver for ZigBee Applications. AT86RF230 datasheet. doc5131.pdf [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] ZigBitTM Amp Development Kit. User's Guide. MeshNetics Doc. S-ZDK-451~02 [8] IEEE Std 802.15.4-2003 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] BitCloudTM IEEE 802.15.4/ZigBee Software. Product User Guide. Atmel's doc8199.pdf
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Section 2 ZigbitTM Module Overview
2.1 Overview
ZigBitTM Amp is an extended-range, low-power, high sensitivity IEEE 802.15.4/ZigBee OEM module, which occupies less than a square inch of space. Based on a solid combination of Atmel's latest MCU Wireless hardware platform, power amplifier and low-noise amplifier, the ZigBit Amp offers an unmatched combination of superior radio performance, ultra-low power consumption and exceptional ease of integration. Figure 2-1. ATZB-A24-UFL/UN Block Diagram
VCC (1.8 - 3.6V)
IRQ UART USART/SPI I2C JTAG ANALOG
PA
ATmega1281
AT86RF230 RF Transceiver
Antenna RF I/O SW LNA SW
GPIO
SPI Bus
ZigBit Amp modules contains Atmel's ATmega1281V Microcontroller [4] and AT86RF230 RF Transceiver [5]. The module features 128K bytes flash memory and 8K bytes RAM. The compact all-in-one-chip integration of output Power Amplifier and input Low-Noise Amplifier, along with RF switches enables digital control of an external RF front-end to dramatically improve ZigBit's range performance on signal transmission and increase its sensitivity. This ensures stable connectivity with larger coverage area without significant increase in module size. The HF U.FL coaxial connector [6] used in the ATZB-A24-UFL module enables the user to choose appropriate external antenna for every type of application. ZigBit Amp already contains a complete RF/MCU 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/MCUsolution, a module-based solution offers considerable savings in development time and NRE cost per unit during the design, prototyping, and mass production phases of product development.
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ZigbitTM Module Overview To jumpstart evaluation and development, Atmel also offers a complete set of evaluation and development tools. The new ZigBit Amp Development Kit [7] (ATZB-DK-A24) comes with everything you need to create custom applications featuring ZigBit Amp module. The kit features MeshBean development boards 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 reference applications 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 tutorials. ZigBit Amp modules comes 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 [7], [8], [9], 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 Amp 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 user application may be used with the BitCloud software allowing customization of embedded applications through BitCloud's C API. In the latter case, the host processor controls data transmission and manages module peripherals 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.
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Section 3 Specifications
3.1
3.1.1
Electrical Characteristics
Absolute Maximum Ratings
Table 3-1. Absolute Maximum Ratings(1)(2)
Parameters Voltage on any pin, except RESET with respect to Ground DC Current per I/O Pin DC Current DVCC and DGND pins Input RF Level Notes: Min -0.5V Max VCC + 0.5V 40 mA 300 mA +5 dBm
1. Absolute Maximum Ratings are the values beyond which damage to the device may occur. Under no 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 AMP is an ESD-sensitive device. Precaution should be taken when handling the device in order to prevent permanent damage.
3.1.2
Test Conditions , Table 3-2. Test conditions (unless otherwise stated) F = 2.45 GHz, VCC = 3V, Tamb = 25C
Parameters Supply Voltage, VCC Current Consumption: RX mode Current Consumption: TX mode
(1) (1)
Range 3.0 to 3.6 23 50 <6
Unit V mA mA A
Current Consumption: Power-save mode Note:
1. The parameters are measured under the following conditions: a) RMS, BitCloud Software is running at 4 MHz clock rate, DTR line management is turned off b) All interfaces are set to the default state (see Pin Assignment Table) c) Output TX power (when measuring consumption in TX mode) is +20dBm d) JTAG is not connected
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Specifications Current consumption actually depends on multiple factors, including but not limited to, the board design and materials, BitCloud settings, network activity, EEPROM read/write operations. It also depends on MCU load and/or peripherals used by an application. 3.1.3 RF Characteristics
Table 3-3. RF Characteristics
Parameters Frequency Band Numbers of Channels Channel Spacing Transmitter Output Power Receiver Sensitivity On-Air Data Rate TX Output/ RX Input Nominal Impedance Range, outdoors Unbalanced output With external 2.2 dBi antenna
(1)
Condition
Range 2.4000 to 2.4835 16 5
Unit GHz
MHz dBm dBm kbps m
Adjusted in 16 steps PER = 1%
+10 to +20 -104 250 50 Up to 4000
Note:
1. Preliminary data
3.1.4
ATmega1281V Microcontroller Characteristics
Table 3-4. ATmega1281V Characteristics
Parameters On-chip Flash Memory size On-chip RAM size On-chip EEPROM size Operation Frequency Condition Range 128K 8K 4K 4 Unit bytes bytes bytes MHz
3.1.5
Module Interfaces characteristics
Table 3-5. Module Interfaces characteristics
Parameters UART Maximum Baud Rate ADC Resolution/ Conversion Time ADC Input Resistance ADC Reference Voltage (VREF) ADC Input Voltage In single conversion mode Condition Range 38.4 10/200 >1 1.0 to VCC - 3 0 - VREF Unit kbps Bits/s M V V
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Specifications Table 3-5. Module Interfaces characteristics
Parameters I C Maximum Clock GPIO Output Voltage (High/Low) Real Time Oscillator Frequency -10/ 5 mA
2
Condition
Range 222 2.3/ 0.5 32.768
Unit kHz V kHz
3.2
Physical/Environmental Characteristics and Outline
Parameters Size Operating Temperature Range Operating Relative Humidity Range Note:
Value 38.0 x 13.5 x 2.0 mm -20C to +70C no more than 80%
Comments ATZB-A24-UFL/U0 -40C to +85C operational(1)
1. Minor degration of clock stability may occur.
Figure 3-1.
ATZB-A24-UFL/U0 Mechanical drawing
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Specifications
3.3
Pin Configuration
Figure 3-2. ATZB-A24-UFL Pinout
Figure 3-3.
ATZB-A24-U0 Pinout
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Specifications
Table 3-6. Pin descriptions
Connector Pin 1 2 3 4 5 6 7 8 9,22,23 Default State after Power on
Pin Name SPI_CLK SPI_MISO SPI_MOSI GPIO0 GPIO1 GPIO2 OSC32K_OUT RESET DGND
Description Reserved for stack operation Reserved for stack operation Reserved for stack operation
(4) (4) (4) (2)(3)(4)(7) (2)(3)(4)(7)
I/O O I/O I/O I/O I/O I/O O
General Purpose digital Input/Output 0 General Purpose digital Input/Output 1
tri-state tri-state tri-state
General Purpose digital Input/Output 2(2)(3)(4)(7) 32.768 kHz clock output(4)(5) Reset input (active low) Digital Ground RF clock output. When module is in active state, 4 MHz signal is present on this line. While module is in the sleeping state, clock generation is also stopped(4). I2C Serial clock output(2)(3)(4)(7) I C Serial data input/output
2
(4)
10
CPU_CLK
O
11 12 13 14 15 16 17 18 19 20 21 24,25 26 27 28 29 30 31 32 33 34
I2C_CLK I2C_DATA UART_TXD UART_RXD UART_RTS UART_CTS GPIO6 GPIO7 GPIO3 GPIO4 GPIO5 D_VCC JTAG_TMS JTAG_TDI JTAG_TDO JTAG_TCK ADC_INPUT_3 ADC_INPUT_2 ADC_INPUT_1 BAT A_VREF
O I/O I O I O I/O I/O I/O I/O I/O
tri-state tri-state tri-state tri-state tri-state tri-state tri-state tri-state tri-state tri-state tri-state
(2)(3)(4)(7)
UART receive input(1)(2)(3)(4)(7) UART transmit output
(1)(2)(3)(4)(7)
RTS input (Request to send) for UART hardware flow control. Active low(2)(3)(4)(7) CTS output (Clear to send) for UART hardware flow control. Active low(2)(3)(4)(7)(8) General Purpose digital Input/Output 6(2)(3)(4)(7) General Purpose digital Input/Output 7
(2)(3)(4)(7)
General Purpose digital Input/Output 3(2)(3)(4)(7) General Purpose digital Input/Output 4(2)(3)(4)(7) General Purpose digital Input/Output 5 Digital Supply Voltage (VCC)
(9) (2)(3)(4)(7)
JTAG Test Mode Select(2)(3)(4)(6) JTAG Test Data Input
(2)(3)(4)(6) (2)(3)(4)(6)
I I O I I I I I I/O tri-state tri-state tri-state tri-state tri-state
JTAG Test Data Output JTAG Test Clock
(2)(3)(4)(6) (2)(3)(7) (2)(3)(7) (2)(3)(7)
ADC Input Channel 3 ADC Input Channel 2 ADC Input Channel 1
ADC Input Channel 0, used for battery level measurement. This pin equals VCC/3.(2)(3)(7) Input/Output reference voltage for ADC
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Specifications Table 3-6. Pin descriptions
Connector Pin 35 36 37 38 39 40 41 42 43 44,45,51,52, 53,56,57 46,47 48,50 49 54,55 Notes: Default State after Power on
Pin Name AGND GPIO9/1_WR UART_DTR USART0_RXD USART0_TXD USART0_EXTCLK GPIO8 IRQ_7 IRQ_6 DGND VRR RF GND RFP_IO VTT
Description Analog ground General Purpose digital input/output 9 / 1-wire interface(2)(3)(4)(7) DTR input (Data Terminal Ready) for UART. Active low(2)(3)(4)(7) USART/SPI Receive pin(2)(3)(4)(7) USART /SPI Transmit pin
(2)(3)(4)(7)
I/O
I/O I I O I/O I/O I I tri-state tri-state tri-state tri-state tri-state tri-state tri-state
USART/SPI External Clock(2)(3)(4)(7)(11) General Purpose Digital Input/Output Digital Input Interrupt request 7
(2)(3)(4)(7) (2)(3)(4)(7)
Digital Input Interrupt request 6 Digital ground
Receiver supply voltage(9) RF Analog Ground(2)(3)(4)(7) Differential RF Input/Output(10) Transmitter supply voltage
(9)
I/O
1. The UART_TXD pin is intended for input (i.e. its designation as "TXD" implies some complex system containing ZigBit Amp 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 alternate functions as described in details in the ATmega1281V Datasheet [3]. 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, [3]). 4. All digital pins are provided with protection diodes to D_VCC and DGND 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 requires 32.768 kHz clock, otherwise this pin can be disconnected. 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: 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/active condition of the module thus providing mechanism for power management of host processor. If this function is necessary, connection of this pin to external pull-down resistor is recommended to prevent the undesirable transients during module reset process.
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Specifications
9. Using ferrite bead and 1 F capacitor located closely to the power supply pin is recommended, as shown below.
10. Pins 48, 49 and 50 are featured for ATZB-A24-U0 module only.
11. 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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Specifications
3.4
Mounting Information
The below diagrams show the PCB layout recommended for ZigBit Amp 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 grounded via several holes to be located right next to pins thus minimizing inductance and preventing both mismatch and losses. Figure 3-4. ATZB-A24-UFL/U0 PCB Recommended Layout, Top View
3.5
Soldering Profile
The J-STD-020C-compliant soldering profile is recommended according to Table 3-7. Table 3-7. Soldering profile(1)
Profile Feature Average ramp-up rate (217C to peak) Preheat tempearture 175C 25C Temperature maintained above 217C Time within 5C of actual peak temperature Peak temperature range Ramp-down rate Time within 25C to peak temperature Note: 1. The package is backward compatible with PB/Sn soldering profile. Green package 3C/s max 180s max 60s to 150s 20s to 40s 260C 6C/s max 8 minuts max
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Specifications
3.6
Antenna Reference Design
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. General 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 Amp module should not be placed next to consumer electronics which might interfere with ZigBit Amp'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 pattern. To eliminate this effect, metalized and grounded holes must be placed around the board's edges.
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Section 4 Ordering Information
4.1 Ordering Information
Part Number ATZB-A24-UFLR ATZB-A24-U0R Note:
Description 2.4 GHz IEEE802.15.4/ZigBee Power Amplified OEM Module with U.FL Antenna Connector 2.4 GHz IEEE802.15.4/ZigBee Power Amplified OEM Module with Unbalanced RF output
Tape&Reel quantity: 200
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Headquarters
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