Atmel ATA5830N Manual de usuario
Atmel ATAN0007
User Guide for ATA5830N 2-way 3-channel Demo
Features
•Complete Bi-directional RF System Reference Design Based on the Atmel ATA5830N
Transceiver that uses a Multi-channel Protocol for Robust Operation
•Included in the Kit are:
– Handheld Key Fob Reference Design using PCB Loop Trace Antenna
– Vehicle Side Reference Design using Monopole Whip Antenna
– Interface Board for STK600 Connectivity (STK600 not Included)
Reference Documents
•ATA5830N.pdf
•Sigma_STK600EEPROM_Setting_RXTX_demo.xls
•testEEPROM_Setting_RXTX_default.xls
1. Overview
The Atmel®ATA5830N is highly integrated UHF ASK/FSK transceiver with low power
consumption available in a small 5x5mm2QFN32 package with 0.5mm pitch. It is
developed as a fully integrated low IF double quadrature receiver with an embedded
AVR®microcontroller including the transmit functionality with a closed loop frac-
tional-N modulator with Gauss-shaping and pre-emphasis for high data rates.
The Atmel ATA5830N can be setup for the following frequency bands:
• 310MHZ to 318MHz
• 418MHZ to 477MHz
• 836MHz to 928MHz
The transceiver combines the functionality of Remote Keyless Entry (RKE) and Tire
Pressure Monitoring (TPM) applications in one chip under the control of an embedded
AVR microcontroller. The flexibility of this device allows the programming of a wide
range of RKE applications, like Passive Entry Go (PEG) and Remote Start (RS)
together with the TPM applications.
The Atmel ATAK51002 evaluation kit provides a complete reference design for a
bi-directional RF system based upon the Atmel ATA5830N. It provides standalone
operation of two Atmel ATA5830N transceivers, one hand-held key fob and one con-
nected to the Vehicle Host Controller. Unencrypted data is exchanged between the
two transceivers and is output via an RS232 connection to a PC. The raw data can be
viewed with a hyper-terminal application. The kit setup and configuration are
described in the following sections. Further information is available in the reference
documentation.
Atmel
ATAN0007
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2. Getting Started
2.1 Kit Contents
This kit contains the following items:
• CAR System Interface Board
• Atmel ATA5830N Transceiver Board
• Atmel ATA5830N handheld key fob
• Monopole whip antenna
• RS232 serial cable
• Digitus USB to Serial interface converter
• 120/240AC to 12VDC wall transformer
• (3) 10-wire cables for I/O port connections between STK600 and System Interface Board
• Atmel CD-ROM with datasheets, reference designs, and software
Note: A Atmel STK600 is required, but not included in this kit. Please contact www.atmel.com or you
local Atmel Sales office for more info on obtaining one.
Figure 2-1. Atmel ATAK51002 Application Kit
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2.1.1 Atmel STK600
The Atmel®STK600 along with the Atmel ATmega2560 microcontroller expansion board func-
tions as the Vehicle Host Controller for the Atmel ATAK51002 application evaluation kit.
Figure 2-2. Atmel STK600 Host Controller Module
2.1.2 CARS Interface Board
The CARS (Car Access Reference System) Interface Board is the gateway between the Atmel
STK600 Vehicle Host Controller and the Atmel ATA5830N Transceiver Board. Additional inter-
face headers are included for future kit expansion to include immobilizer and passive entry
functionality.
Figure 2-3. CARS Interface Board
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2.1.3 Atmel ATA5830N Transceiver Board
The Atmel®ATA5830N Transceiver Board provides the RF link between the Atmel ATA5830N
hand-held key fob and the Atmel STK600 Vehicle Host Controller.
Figure 2-4. Atmel ATA5830N Transceiver Board
2.1.4 Atmel ATA5830N Key Fob
The Atmel ATA5830N key fob is a hand-held transceiver used to communicate with the Atmel
STK600 Vehicle Host Controller. The key fob contains four buttons, each capable of transmit-
ting unique data over the RF link to the Host Controller.
Figure 2-5. Atmel ATA5830N Transceiver Key Fob
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2.2 Connecting the Hardware
Prepare the Atmel®STK600 with the Atmel ATmega2560 device board as described in the
Atmel STK600 User Guide. Using a 2-wire cable supplied with the Atmel STK600, connect
RS232 SPARE pins RXD and TXD to PORTH pins PH0 and PH1 making sure RXD connects
to PH0 and TXD connects to PH1. Using the two 10-wire cables supplied with the Atmel
STK600, connect PORTA to LEDS. Using the three 10-wire ribbon cables supplied with the
CARS evaluation kit, make connections from the Atmel STK600 to the System Interface
Boards; PORTB to PB, PORTD to PD, and PORTE to PE.
Note: Be sure to properly match header alignment to pin 1 on both ends of the cable when making
these connections.
Mount the Atmel ATA5830N Transceiver Application Board to the System Interface Board tak-
ing care to align the X1 and X2 pin headers on the Transceiver Application Board to the
UHF_ X1 and UHF_X2 pin sockets on the System Interface Board. Connect monopole RF
whip antenna to the Transceiver Application Board and ensure that a jumper is installed onto
J1.
Complete the set-up by connecting supplemental 12VDC power from the wall transformer to
the mating receptacle on the Atmel STK600 and connect the USB and RS232 ports to the PC
with the supplied cables. Also install a CR2032 Li-ion coin cell battery (not included with the kit
due to governmental shipping regulations) into the hand-held key fob. Please ensure that the
“+” side of the battery is correctly aligned with the “+” on the metal battery clip on the key fob.
Figure 2-6. Atmel ATAK51002 Hardware Interconnection
Note: Use the USB to Serial converter dongle included with the kit if your PC does not have an RS232
port.
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2.3 Device Programming
2.3.1 Atmel ATmega2560 Host Controller
Since the Atmel®STK600 hardware is not included with the Atmel ATAK51002 kit, the Atmel
ATmega2560 Host Controller must be flashed with the Atmel ATA5830N application firmware
to operate. In-System Programming of the Atmel ATmega2560 can be done using the AVR®
internal SPI (Serial Peripheral Interface) to download code into the flash and EEPROM mem-
ory. ISP programming requires only VCC, GND, RESET and 3 signal lines for programming.
No high voltage signals are required. The ISP programmer can program both the internal flash
and EEPROM, fuses, lock bits and calibration bytes. The ISP frequency (SCK) must be less
than 1/4 of the target clock. The ISP frequency is set by the Atmel STK600 programming dia-
log in AVR Studio. Refer to the Atmel STK600 User Guide for additional information.
To program the Atmel ATmega2560 on the device card installed in the Atmel STK600, con-
nect a 6-wire cable between the two 6-pins ISP headers on the Atmel STK600. See Figure 2-7
and Figure 2-8 below. Ensure that the VTARGET jumper is mounted, and that the voltage is
the within the operating range for the target device.
Figure 2-7. Atmel STK600 ISP Headers
Figure 2-8. ISP 6-Wire Ribbon Cable Connection
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Using AVR Studio®4, program the Atmel®ATmega2560 on the Atmel STK600 by selecting
Tools/AVR Programming to bring up the ISP menus. Select and specify the Tool, Device,
Interface, and Target Voltage as shown below and browse to locate files titled
“ATAK51002_V1_STK600.hex” and “ATAK51002_V1_STK600.eep”. The files can be found in
the CD-ROM supplied with the CARS kit. Be sure to set the target voltage for 5.0V when pro-
gramming the Atmel ATmega2560. Refer to Figure 2-9 for a screen shot of the properly
completed ISP programming menu along with a view of proper fuse settings.
Figure 2-9. ISP Programming and Fuse Menus for the Atmel ATmega2560
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2.3.2 Atmel®ATA5830N Transceiver Board
Standalone programming of the Atmel®ATA5830N Transceiver Board is not required. The
Atmel ATA5830N Transceiver Board is automatically configured whenever power is first
applied to the Vehicle Host Controller.
2.3.3 Atmel ATA5830N Key Fob
AVR Studio®4 must be updated with the Atmel ATA5830N hardware profile in order to pro-
gram the Atmel ATA5830N hand-held key fob. Run the “ATA5830include2AVRstudio.exe”
executable file included on the CD-ROM with the Atmel ATAK510020 kit. Once the installation
has completed, start AVR Studio4, install a CR2032 battery into the key fob (not included with
the kit) and connect the included 6-wire ISP cable between the Atmel STK600 ISP program-
ming header and the ISP header on the Atmel ATA5830N key fob. Connect to the key fob
through the AVR Studio4 using the Atmel STK600 and configure the device from the “Main”
menu tab for programming with the Device set to “ATmegasigma20”, Programming Mode set
to “ISP Mode” and the ISP frequency to 125kHz (the device may not program at higher fre-
quencies). Figure 2-10 is a screen capture of the correct device setting.
Note: In order to read the device Signature Byte, read/program the fuse settings or program the
flash/EEPROM, the Atmel ATA5830N must be operating in the Idle Mode (default state is Sleep
Mode). To wake the device up from Sleep, PRESS and HOLD any key fob button for the dura-
tion of the read, write or programming operations.
Figure 2-10. Atmel ATA5830N AVR Studio4 Main Menu Configuration
Next, program the Atmel®ATA5830N fuses settings using the “Fuse” menu tab. Ensure that
the SPIEN and EESAVE fuses are set with all others unchecked, see Figure 2-11 on page 9.
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Figure 2-11. Atmel ATA5830N AVR Studio®4 Fuse Configuration
Finally, program the flash with the file “ATAK51002_V1_FOB.hex” and EEPROM with
“ATAK51002_V1_FOB.eep”.
Figure 2-12. Atmel ATA5830N AVR Studio4 Program Configuration
2.4 Hyper-terminal Application
Download and install a Hyper-terminal application for communication between the PC and the
Atmel STK600 Vehicle Host Controller using the RS232 interface. Any Hyper-terminal applica-
tion like HyperTerminal, HTerm or RealTerm are suitable for use with the Atmel ATAK51002
evaluation kit.
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3. Running the Demo Application
With the application boards connected, the hardware programmed and the Atmel®STK600
powered and connected to the PC via the USB and RS232 ports, it is now time to run the
demo. Begin by running the Hyper-terminal application on the PC and configure it as follows:
The Hyper-terminal application must be configured as follows:
• Port: will vary depending on your PC configuration
• Baud: 38.4kbaud
• Data Bits: 8
• Stop Bits: 1
• Parity: None
• HW Handshake: None
• Newline at: CR
Communication between the key fob and the Vehicle Host Controller utilizes a bi-directional
protocol where a message is transmitted by the key fob when a button is pressed. The Host
Controller then responds to the transmission from the key fob in the form of an ACK (acknowl-
edge). The key fob application is configured as a Flash application for the Atmel ATA5830N
using the internal ROM firmware and controls the four key switches and the LED located on
the key fob. The Vehicle Host Controller application uses the Atmel STK600 with the on-board
Atmel ATmega2560 expansion board to control the operation of the Atmel ATA5830N via the
SPI commands as described in the Atmel ATA5830N datasheet.
A button press on the key fob transmits 9 bytes of data to the Host Controller. This data along
with the incoming received data channel number, RSSI level and button number are output via
the RS232 link to the PC. The data can then be viewed using the Hyper-terminal application.
Figure 3-1. Hyper-terminal Key Fob Data Output
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