Atmel ATAB5749 Montage- und Bedienungsanleitung

9138B-AUTO-07/15

Introduction

The Atmel®software development tool RF Design Kit enables the programming and setting

of a wide range of RF automotive products to build RF systems for development purposes.

The software is particularly suitable for setting parameters of UHF receiver and transmitter

demo boards.

The ATA5749, Atmel’s newest UHF transmitter, boasts many new features. The main new

feature is its programability. Parameters such as transmit power, the transmit frequency,

and the frequency deviation for FSK modulation can be programmed. The latest RF Design

Kit (version 1.0.7) supports the ATAB5749, which is the demo board for the transmitter

ATA5749. This application note provides an introductions to using the ATAB5749 with the

RF Design Kit software.

APPLICATION NOTE

Getting Started with ATAB5749

Using RF Design Kit Software

ATAB5749

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

1. Delivery Status of the Transmitter Board

1.1 Hardware

The front and the rear view of the transmitter board are illustrated in Figure 1-1. The schematic of the board is shown in

Figure 1-2 on page 3, and the board layout information is showed in Figure 1-3 on page 4 to Figure 1-5 on page 5. The bill of

material of the transmitter board is listed in Table 1-1 on page 5.

The board contains the following parts:

●Lithium battery

●Transmitter matched to the loop antenna.

Note: 1. Atmel offer 2 different demo boards for the ATA5749 due to the Loop Antenna matching, matching to the

315MHz and 433.92MHz.

Generally the ATA5749 can be set in both 315MHz and 433.92MHz transmit frequency with one 13.0MHz crys-

tal. So the 315MHz board can be reprogrammed for 433.92MHz transmitting purposes. In this case the

matching elements must be changed to get the optimal transmit power.

Verification with 50matching is possible.

●AVR®ATmega88 is used on the board for programming

●An external microcontroller can be used to set the ATA5749 on the boards since some test points are placed on the

control and the programming traces of ATA5749.

Note: The connection between the ATmega88 and ATA5749 can be disconnected by desoldering the jumpers (BR1

to BR4). (See the schematic of the board in Figure 1-2 on page 3.)

●Three buttons are available.

●Two Light Emitting Diodes are available to show the activity status of the board. The LED 1 indicates that the

calibration of the internal RC oscillator of ATmega88 exceeds the defined tolerance limits in the software of

ATmega88. LED 2 indicates the transmit functions of the transmitter board.

Note: The internal RC oscillator is always calibrated internally when any button is pushed. In case that no exact cali-

bration value can be calculated, the closest value will be taken.

A short flash of the LED 2 indicates the start of the function “Single Telegram” or “Single Pattern” when a button

is pressed. The same indicator can be also recognized for start and end of any continuous functionality like

“Continuous Telegram”, “Continuous Pattern”, etc.

Figure 1-1. ATAB5749 Demo Board Front and Rear View

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

Figure 1-2. Schematic of the Demo Board ATAB5749

GND

XTO2

XTO1

SCK

SDIN_TXDIN

ANT1

ADC7

AREF

PB5

AVCC

ADC6

GND21

PC0

PC1

3GND3

GND5

PB7

PB6

VCC6

VCC4

PD4

PD3

PB4

PB3

PB2

PD7

PD6

PD5

PB0

PB1

PC2

PC3

PC4

PD0

PD1

PD2

PC6

PC5

CLK

10 1

ANT2

BA2032SM

C10

GND1CLK1 STXDIN1EN1 SCK1 VS1

C11 C12

BR5

BR3 BR4BR1

BR2

R3R4

D1D2

PB2_ENABLE PD1_SDI

B8B6

A7MOSIMISOA1

PD1_SDI

MISO

MOSI

PB2_ENABLE

SCK

PD4_SCK

Loop Antenna

w = 1 mm

25 mm x 25 mm

C14

C13

Quarz

MOSI

PD4_SCK

SCK VS

Q1a

Quarz

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

Figure 1-3. Top Layer of the Demo Board ATAB5749

Figure 1-4. Bottom Layer of the Demo Board ATAB5749

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

Figure 1-5. Designator

Table 1-1. Bill of Material of the Demo Board ATAB5749

Components Pieces 315MHz 433MHz Value Tolerance Material Housing Manufacturer/

Distributor

BR1, BR2,

BR3, BR4 4 x x 0 0603

R2, BR5 2 x x 0 0402

R3, R4 2 x x 1k10% 0603

C1 1 x x 100nF 10% X7R 0603 Murata®

C2, C3 2 x x 15pF 2% COG 0603 Murata

C5 1 x x 68nF 10% X7R 0603 Murata

C6 1 x x 1nF 10% X7R 0603 Murata

C7 n.m.

C8 1 x 3.9pF 5% COG 0603 Murata

1 x 18pF 5% COG 0603 Murata

C9 1 x 27pF 5% COG 0603 Murata

1 x 82pF 5% COG 0603 Murata

C10 1 x 39pF 5% COG 0603 Murata

1 x 82pF 5% COG 0603 Murata

C11 1 x 3pF 5% COG 0603 Murata

1 x 5pF 5% COG 0603 Murata

C12 1 x 2.2pF 5% COG 0603 Murata

1 x 8.2pF 5% COG 0603 Murata

C13 n.m.

C14 1 x 100nF 10% X7R 0603 Murata

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

1.2 Software

The board ATAB5749 is be delivered with default settings as detailed in the Table 1-2 below.

In order to use the ATAB5749 board, an additional board as well as the RF Design Kit software is needed. Either the

ATAB-RFMB or ATAB-STK-F is used as a microprocessor board interfacing the RF Design Kit software and the transmitter

board. For further information about the hardware refer to the application notes “ant_hd-rf-desing-kit_041105_sec.pdf” and

“ant_hd-flamingo_181105_sec.pdf”.

L1 1 x 27nH 2% 0603CS 0603 Coilcraft®

1 x 47nH 2% 0603CS 0603 Coilcraft

L2 1 x 12nH 2% 0603CS 0603 Coilcraft

1 x 27nH 2% 0603CS 0603 Coilcraft

Q1 1 x x 13MHz 5032//3225 KSS®

U1 1 x x ATA5749 TSSOP10 Atmel

U2 1 x x ATmega88 MLF32 Atmel

D1, D2 2 x x TLMD3100 P-LCC-2

(sizeB) Vishay®

Table 1-1. Bill of Material of the Demo Board ATAB5749 (Continued)

Components Pieces 315MHz 433MHz Value Tolerance Material Housing Manufacturer/

Distributor

Table 1-2. Software Default Settings of the ATAB5749

ATA5749 - 433MHZ ATA5749 - 315MHZ

Control Register - Values Control Register - Values

Band selection: 367MHz to 450MHz Band selection: 300MHz to 368MHz

RF frequency: 433.92MHz (FREQ = 14353) RF frequency: 315MHz (FREQ = 3741)

Modulation: FSK Modulation: FSK

FSK shift: ±30kHz (FSEP = 75) FSK shift: ±30kHz (FSEP = 75)

Output power (with 50

matching): +12.5dBm (PWR = 15) Output power (with 50

matching): +12.5dBm (PWR = 15)

Clock Only Mode: Normal Mode Clock Only Mode: Normal Mode

CLK output: 3.25MHz (fCLK =f

XTO/4) CLK output: 3.25MHz (fCLK =f

XTO/4)

Clock on: Clock port is ON Clock on: Clock port is ON

Data rate: 1,000Kbit/s (Manchester)

Preburst: 24 bits (24.000 ms)

Testword (Hex): F09AF09A

Pattern

TStep: 90.91µs

Pattern Length: 24 bit (2.1818ms)

Pattern (Hex): 0x5555h

Programmable Push Buttons

Button S1: Continuous telegram

Button S2: Single telegram

Button S3: Continuous carrier (unmodulated)

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

2. Getting Familiar with the RF Design Kit

To learn about the installation of the RF Design Kit software, refer to the application note

“ant_sd-rf-design-kit_041105_sec.pdf”. The following is a list of the first steps to take when working with the RF Design Kit

and the transmitter board:

●Connect the RS232 cable between the microprocessor board, the ATAB-RFMB or ATAB-STK-F, to an unused PC

serial port.

●Connect the Microprocessor board with a 12V power supply.

●Switch on the 12V DC power supply of the microprocessor board before running the RF design Kit software.

●The file “RF-Designkit.exe” runs the software and test the connection to the microprocessor board.

●The latest RF Design Kit software is the version 1.0.7. This can be seen from the Help menu refer to the Figure 2-1.

Figure 2-1. IRF Design Kit Software Version Information Window

●For the RF Design Kit Version 1.0.7, the AVR®software version on the microprocessor board must be version 1.0.10.

This information can be also seen from the Help menu. Please refer to Figure 2-2.

Figure 2-2. Information Window of the AVR Software Version on the Microprocessor Board

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

●It is important to remove the lithium cell from the battery holder of the transmitter board before programming the board

with the microprocessor board. If the battery is still in the holder during the programming progress, an error message

will be generated by the software requesting removal of the battery. This error massage is illustrated in Figure 2-3.

Figure 2-3. Error Code for Removing the Battery during the Programming Process

●Plug the transmitter board into the socket on the microprocessor board. The RF transmitter type and the software

version of the microprocessor on the demo board can be observed by clicking on the Transmitter Information button

●After clicking the Transmitter Information button, the Info dialog box is displayed (see Figure 2-4). The firmware

version and the type of transmitter board is displayed.

Figure 2-4. Information Window of the Firmware Version and the Type of the Transmitter Board

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

●The correct transmitter can be selected from the Transmitter drop down menu (see Figure 2-5).

Figure 2-5. Transmitter Section by the Corresponding Part Number

●After selecting the correct transmitter, in this case the ATA5749 (315MHz) or ATA5749 (433MHz), a menu of

parameter settings is displayed (see Figure 2-6).

Figure 2-6. Parameter Settings of the Corresponding Part Number

ATAB5749 [APPLICATION NOTE]

9138B–AUTO–07/15

TX Buttons:

Control Register Table (CR-Table):

This table illustrates the internal register configuration of the ATA5749. The configuration bytes can be modified directly in

the CR-Table by clicking in the field of the binary value.

Figure 2-7. Control Register Table

Control Register Value (CR-Value) (Figure 2-8 on page 11):

This window interprets the register configuration setting of CR-Table. If the setting in the CR-Table is changed, the CR-Value

window shows the change automatically and vice versa. The following parameters of the ATA5749 can be set:

●Band Selection: either 300MHz to 368MHz or 367MHz to 450MHz.

●RF Frequency: The transmit frequency of the board can be determined by selecting the value of the FREQ register.

The green check mark in the drop down menu shows the FREQ values allowed; the red cross shows the values not

allowed.

●Modulation: sets the modulation of the board either to ASK Mode or FSK Mode

Load TX default settings into the RF design software. Note: this is not stored on the

transmitter board.

Load custom settings into the RF design software.

Save custom settings.

Read and display the whole current settings from the transmitter board.

Write the current settings from the RF Design software to the transmitter board.

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