Table of Contents
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Software Revision History
Software Version
v2.0
28.08.2006 Initial Version for MLX71122A
v2.1
03.01.2007 Adaptation of software to 2
v3.1
10.04.2008 Adaptation of software to 2
v3.2
26.08.2011 Description for USB-SPI converter added
39011 71122 01
Rev. 004
MLX71122 RF Receiver
Programming Software Manual
Software Version v3.2
Date
Page 1 of 21
SW71122
MLX71122 RF Receiver
Programming Software Manual
Changes
nd
version of MLX71122A
nd
version of MLX71122B
Doc. Rev.
001
002
003
004
SW71122-Manual
Aug/11
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Table of Contents
Summary of Contents for Melexis MLX71122
- Page 1 SW71122 MLX71122 RF Receiver Programming Software Manual MLX71122 RF Receiver Programming Software Manual Software Version v3.2 Software Revision History Software Version Date Changes Doc. Rev. v2.0 28.08.2006 Initial Version for MLX71122A v2.1 03.01.2007 Adaptation of software to 2 version of MLX71122A v3.1...
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Page 2: Table Of Contents
SW71122 MLX71122 RF Receiver Programming Software Manual Content General Description ....................4 Hardware and Software Requirements ..............5 Installation and Files....................5 Using the Software.....................6 Software Start Up ......................6 Menus..........................7 4.2.1 File.............................7 4.2.2 LPT ............................7 4.2.3 Settings............................7 4.2.4 About ............................8 Send to IC - Button ......................9 Tuning Info - Frame ...................... - Page 3 SW71122 MLX71122 RF Receiver Programming Software Manual 5.3.7 VCO Range ..........................16 5.3.8 VCO Buffer Current .........................16 5.3.9 VCO Core Current ........................16 Frequency and IFF Control – Tab..................17 5.4.1 Auto Adjustment ........................17 5.4.2 Halt ............................17 5.4.3 RIFF Divider ..........................17 5.4.4 IFF Preset Value........................18...
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Page 4: General Description
Serial Programming Interface (SPI) through the three pins A/SCLK, B/SDTA and C/SDEN. The pin SPISEL must be at logic HIGH in order to set the MLX71122 to SPI mode. Otherwise the receiver operates in stand-alone (or ABC) mode and cannot be programmed via the three pins A/SCLK, B/SDTA and C/SDEN. -
Page 5: Hardware And Software Requirements
If the PC’s USB port is used, a USB-SPI converter is required. It is available on request or can be purchased together with the evaluation board EVB71122. Note that pin 7 of the MLX71122 (SPISEL) is connected to logic HIGH on the EVB71122. This is to set the receiver to SPI mode. -
Page 6: Using The Software
SW71122 MLX71122 RF Receiver Programming Software Manual We recommend creating the icon of the main program on your PC’s desktop to easily access the program. The working directory folder of the link should be set to the installation folder. Using the Software... -
Page 7: Menus
SPI logical high level set by internal reference voltage The Defaults menu item of this menu restores the state that is hard-coded on the MLX71122 and that is ac- tive after powering up the IC. The default receive frequency is 384MHz. After recovering the default settings the text Default Settings is displayed in the window title as reminder. -
Page 8: About
SW71122 MLX71122 RF Receiver Programming Software Manual 4.2.4 About This menu displays a window with information about the LPT-port to pin connections. This menu displays a window with information about the USB-SPI converter (only available if the USB-SPI converter is used). -
Page 9: Send To Ic - Button
SW71122 MLX71122 RF Receiver Programming Software Manual Send to IC - Button After pressing the Send to IC button the registers R0 to R6 of the IC will be programmed with the data from the actual state. If the checkbox Send always is activated this operation is performed every time a control field is changed. -
Page 10: Ic Status - Frame
SW71122 MLX71122 RF Receiver Programming Software Manual IC Status - Frame The IC Status frame displays information about the internal state of the IC if the Multi Functional Output (MFO) mode is set to SPI out (left figure). A click on the Refresh button reads out the data from the MFO-pin of the IC. -
Page 11: Description Of The Control Tabs
SW71122 MLX71122 RF Receiver Programming Software Manual Description of the Control Tabs The user can select five tabs for different control settings of the SPI-mode. Mode Control – Tab The Mode Control tab displays all dialog fields that are used to change the operating modes of the circuit. On top are the controls for the Operation Mode and the mode of the Multi Functional Output (MFO). -
Page 12: Multi Functional Output Mode
With RO-out a 10MHz clock frequency is available on the board that can also be used to save one quartz crystal by driving the RO of another MLX71122 receiver. IF-out provides the internal IF2 signal amplified by a factor of 5 if the MFO-pin is unloaded. The output resistance is about 610Ω in this mode. -
Page 13: Gain Control - Tab
SW71122 MLX71122 RF Receiver Programming Software Manual Gain Control – Tab The Gain Control tab is split up into an upper part defining the static gain of different receiver blocks and a lower part for controlling the Automatic Gain Control (AGC). -
Page 14: Nd Mixer Gain
IF-filter as low as possible. If the input signal increases the filter will soon become nonlinear because the input level is too high. A digital control circuit of the MLX71122 can be used to lower the gains of the previous blocks to maintain the linear input range of the IF-filter as far as possible. First the gain of mixer 2 is lowered, then mixer 1 and in the end the LNA gain. -
Page 15: Pll Control - Tab
SW71122 MLX71122 RF Receiver Programming Software Manual PLL Control – Tab The PLL Control tab contains settings for the PLL and the VCO. 5.3.1 LDTIME This selection box specifies the minimum time delay before a lock in of the PLL occurs after start of the PLL. -
Page 16: Rocur
5.3.7 VCO Range The MLX71122 is designed for V = 5V so the default value of this setting is 5V. Nevertheless, it can be used down to 3V if this value is set to 3V. The most critical part at lower supply voltages is the VCO range which can be adjusted with this setting. - Page 17 SW71122 MLX71122 RF Receiver Programming Software Manual Frequency and IFF Control – Tab The Frequency and IFF Control tab contains settings for the IF-filter auto-adjustment circuit and for the control of the receive frequency. The IF-Filter Auto-Adjustment Control uses a digitally controlled oscillator that works like a digital PLL. Its reference frequency, which is by default at about 3MHz, is derived from the RO frequency by dividing f RIFF Divider and multiplying it by 200.
- Page 18 SW71122 MLX71122 RF Receiver Programming Software Manual 5.4.4 IFF Preset Value This value is the start value of the digitally controlled filter oscillator. It is loaded into the internal control word register after start-up or if the auto-tuning is deactivated. Default value is 91.
- Page 19 SW71122 MLX71122 RF Receiver Programming Software Manual 5.4.13 The frame Injection Side defines the injection side of the LO signals into the mixers. At high side injection the LO signal has a higher frequency than the other input signal of the mixer and vice versa. The LO1 value is only used for calculation reasons since it has no effect on the register settings.
- Page 20 SW71122 MLX71122 RF Receiver Programming Software Manual Your Notes 39011 71122 01 Page 20 of 21 SW71122-Manual Rev. 004 Aug/11...
- Page 21 MLX71122 RF Receiver Programming Software Manual For the latest version of this document, go to our website at: www.melexis.com Or for additional information contact Melexis Direct: Europe and Japan: All other locations: Phone: +32 1367 0495 Phone: +1 603 223 2362 E-mail: sales_europe@melexis.com...
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