Si 4 7 1 x - EVB S i471 X E V A L U A T I O N B O A R D U S E R ’ S G U I D E 1. Introduction Thank you for purchasing the Silicon Laboratories Inc. Si471x FM Transmitter Evaluation Board (EVB). This EVB and associated software has been designed to speed the overall development process and decrease the required development time from EVB to product launch. We are looking forward to working with you, and have posted support articles, answers to frequently asked questions, and application notes at www.
Si471x-EVB J6 U10 J5/J13 J7 U9 J19 J27 J52 J30 J45 J44 J57 J41 X1 J61 J54 J68 J69 R73 R74 J75 J76 U18 D1 J79 J74 PB1 SW1 J78 Figure 1.
Si471x-EVB Baseboard Audio I/O Connectors/Devices: J7 J6 J19 J30 U9 U10 RCA input RCA output Line/SPDIF input Line/SPDIF output S/PDIF Translator CODEC J5 J13 J41 J44 J45 Jumper: Analog audio right channel select (RCA or Line In) Jumper: Analog audio left channel select (RCA or Line In) Jumper: For GPO3/DCLK pin, select between GPO3 or DCLK Jumper: Si471x Audio1 select (Transmit or Receive) Jumper: Si471x Audio 2 select (Transmit or Receive) Baseboard Clock Connectors/Devices: X1 32.
Si471x-EVB J1 L2 U1 R4 C8 R2 J2 Antenna Figure 2. Daughterboard Connectors and Devices Daughterboard Components: U1 Si471x FM Transmitter Chip L2 Tuning Inductor R2 0 Ω resistor to connect FM TX output to 6cm trace built-in antenna C8 2 pF capacitor to connect FM TX output to J1 SMA connector R4 50 Ω terminator resistor J1 J2 SMA connector for FM transmitter output Header for putting external antenna Figure 3. Fully Assembled EVB 4 Preliminary Rev. 0.
Si471x-EVB 3.1. Jumper or Solder Bump Configuration The EVB for the Si471x has two different ways to setup jumpers: 1. Berg stick jumper (if the Bergstick headers are installed). 2. Solder bump jumper. If you have an EVB that doesn't have the header installed, then use the solder bump jumper to select the desired settings. The solder bumps and Bergstick jumpers exist in parallel, so only use one of them.
Si471x-EVB 3.2. Si471x Base Board 3.2.1. Power Supply Network DAUGHTER BOARD SW1 LDO 1.25-3.9V (R73) J78 EXT LDO 1.25-7V (R74) ADJ Jumper J69 +3.3V 11 VDD VIO TB +3.3V J79 USB ADJ Jumper J68 10 TB LDO +3.3V (U17) Si471x TB Jumper J61 +3.3V Vmcu VIO Vm Vio Vdd Gnd VDD J77 Terminal Block (TB) Figure 5. Power Supply Block Diagram The EVB can be powered from 3 different kinds of power supplies: 1. USB power supply via J79 2. Ext DC power supply via power jack J78 3.
Si471x-EVB Fixed +3.3V ADJ +3.3V TB J68 J69 Vmcu +3.3V Vdd TB Vio ADJ +3.3V TB Only one LDO is being used in this mode which outputs a +3.3 V supply to all three Vdd, Vio, and Vmcu supplies. The jumpers need to be set according to Figure 6. This is the default configuration of the EVB. J61 Figure 6. Default Fixed +3.3 V Jumpers Setting Adjustable Vdd and Vio ADJ +3.3V TB J68 J69 Vmcu +3.3V Vdd TB Vio ADJ +3.
Si471x-EVB 3.2.2. Microcontroller TC_BCLK (for digital tx/rx make sure to connect this) Jumper J41 DAUGHTER BOARD MD_GPIO3 MS_GPIO2 MD_GPIO1 J79 USB J74 JTAG SD_GPO1 GPO1 GPO2 GPO3/ DCLK Jumper J65 MCU C8051F342 PB1 Reset S_GPO3/DCLK MD_GP4 MS_RSTB 19 18 17 RST~ 5 Si471x SEN~ SCLK SDIO 6 7 8 MS_SENB MS_SCLK MS_SDIO Figure 9.
Si471x-EVB 3.2.3. Reference Clock for the Si471x DAUGHTER BOARD Jumper J57 DIS_INT_RCLK X1 32.768kHz INT RClk Si471x INT_RCLK Jumper J52 9 RCLK EXT_RCLK J54 EXT RClk Figure 10. Reference Clock Block Diagram The Si471x accepts a 32.768 kHz reference clock at the RCLK pin. On the EVB, this clock is provided by a precision crystal oscillator. The user has the option of not using the oscillator and bringing in the reference clock from an external source through SMA connector J54.
Si471x-EVB 3.2.4.
Si471x-EVB IMPORTANT: Jumper Settings Because of the many possibilities available to configure the EVB, please make sure that these four jumpers are set accordingly: 1. 2. 3. 4.
Si471x-EVB 4. Recommended Hardware Setup Analog Audio Generator RCA Cable J7 RCA IN SMA Cable RF Analyzer J1 FM OUT J19 Si471x FM Transmitter Daughterboard Jumpers Setting DCLK TX GPIO3 J41 RX RX J44 J45 S/PDIF Audio Generator TX Note: J44 and J45 are automatically configured in EVB Rev1.3 J76 Si471x FM Transmitter Baseboard Terminal Block (TB) USB J79 SW1 EXT pwr USB pwr J77 EXT Jack USB Cable PC w/ USB port Figure 12.
Si471x-EVB 5. Getting Started - Software Installation (Firmware 1.B) The Si471x Windows GUI (graphical user interface) Software is designed and intended for use only with the Si471x evaluation board (EVB). This user guide is written to support Firmware Revision 1.B. The GUI software revision number is available under help\about. The GUI software development program uses host machine USB port to communicate with the Si471x EVB and is tested for use with Windows XP and Windows 2000.
Si471x-EVB Figure 14. Delete the Si47xx Folder Entirely After the old version has been removed, insert the Silicon Laboratories, Inc. Si471x CD into the host machine CD drive and launch Windows Explorer. Open the CD to explore the contents in a window like the one shown in Figure 15. Figure 15. Installation and Setup Start Screen Important: Open and read the ReleaseNotes.txt file at this point.
Si471x-EVB Figure 16. Launching Si471x FM Transmitter Application The first Si471x window is the Initialization window as shown in Figure 19. Select the target device by clicking on the EVB serial number with the Si471x name underneath. Click open, and a new window displaying "Initializing Transmitter" will appear. There are three modes to configure the Si471x with the Alpha 3 release: 1. Analog Input 2. Analog to Digital Input 3. Digital Input Preliminary Rev. 0.
Si471x-EVB 5.1. Configuring the Si471x to Receive Analog Input This mode configures the Si471x to receive analog audio input at pin 15 and 16 (LIN and RIN). The user has the ability to provide analog audio from RCA In connector (J7) or Line In (J19). Please set jumpers J5 and J13 accordingly. Figure 17 shows the configuration setting for analog audio input. Figure 17. Configuring Si471x to Receive Analog Input 16 Preliminary Rev. 0.
Si471x-EVB 5.2. Configuring the Si471x to Receive Digital Input by Using Analog Source This mode configures the Si471x to receive digital audio input at pin 13 and 14 (DIN and DFS), but the user still provides an analog audio source to the EVB. It is useful for a user who wants to test digital input on the Si471x but does not have a digital audio source. The analog audio source is converted to digital audio through the CODEC, which can be configured to output various digital audio formats.
Si471x-EVB 5.3. Configuring the Si471x to Receive Digital Input by Using Digital Source (SPDIF) This mode configures the Si471x to receive digital audio input at pin 13 and 14 (DIN and DFS) when the user has an SPDIF digital audio source. The SPDIF source is converted to PCM digital audio by the SPDIF translator. Please refer to Figure 24, “SPDIF Property Window,” on page 26 to control the SPDIF translator.
Si471x-EVB 6. Development Using Si471x GUI (Firmware 1.B) 6.1. Si47xx GUI - Main Window 1 2 3 15 16 4 17 5 9 6 10 7 12 8 13 18 19 11 20 21 22 14 23 Figure 20. Si471x FM Transmitter Window Table 2. Control Bit Explanations # Explanation Range 1 Transmit frequency display. Enter the desired FM transmit frequency in this window. 76–108 MHz 2 Transmit power display. Enter the desired FM transmit power in this window. 88–120 dBuV 3 RF on or off.
Si471x-EVB Table 2. Control Bit Explanations (Continued) # Explanation Range 14 Audio Level Indicators: Overmodulation, Audio input level below low-level threshold (silence detection), and Audio input level below high-level threshold (loud detection). To enable these three indicators please check off the Enable Interrupts box. These three indicators are sticky bit, in order to clear these bits, press the Reset button. — 15 Pre-Emphasis.
Si471x-EVB 6.2. Si47xx GUI - Analog Property Window This Analog Property Window controls the various analog audio input properties on the Si471x. Clicking on Windows→Properties when in Analog Mode will launch the Analog Property Window as shown in Figure 21. Figure 21. Si471x Analog Property Window Table 3. Analog Property Window Explanations Item Explanation GUI Update Rate Set the GUI update rate between the computer and the EVB. (Sec) Range 0.
Si471x-EVB Table 3. Analog Property Window Explanations (Continued) Item Explanation Range Audio Level High Set the threshold in which an interrupt will be generated when the audio Threshold (dBFS) input level rises above this threshold for the duration greater than the Audio Level High Duration setting. This may also be called loud detection indicator. –70 to 0 Audio Level High Set the duration for the audio level high before an interrupt is generated.
Si471x-EVB 6.3. Si47xx Digital Property Window This Digital Property Window controls the various digital audio input properties on the Si471x. Clicking on Windows→Properties when in Digital Mode will launch the Digital Property Window as shown in Figure 22. Figure 22. Si471x Digital Property Window Table 4.
Si471x-EVB Table 4.
Si471x-EVB 6.4. Si47xx GUI - CODEC Property Window This CODEC Property Window controls the various properties of the CODEC on the EVB baseboard. In the Digital Mode, when using the Analog In to CODEC method, the Digital Property Window has a baseboard setting that can be selected in the property category pull-down menu where the window will become the CODEC Property Window. Figure 23. CODEC Property Window Table 5.
Si471x-EVB 6.5. Si47xx GUI - SPDIF Property Window This SPDIF Property Window controls the various properties of the SPDIF translator on the EVB baseboard. In the Digital Mode, when using the SPDIF method, the Digital Property Window has a baseboard setting that can be selected in the property category pull-down menu where the window will become the SPDIF Property Window. Figure 24. SPDIF Property Window Table 6.
Si471x-EVB 6.6. Si47xx GUI - Register Map Window The register map window allows the user to manually program the device by sending commands to the chip. Refer to “AN305: Si4710/11 FM Transmitter Programming Guide” to be able to manually program the device. Clicking on Windows→Register Map will launch the Register Map Window as shown in Figure 25. Figure 25. Si471x Register Map Window Preliminary Rev. 0.
Si471x-EVB 6.7. Si47xx GUI - Received Power Scan Window The Received Power Scan Window is only available with the Si4712/13 devices. It enables the user to scan the entire FM band to find an empty channel. The frequency of this channel can then be used to transmit. Clicking on Windows→Power Scan will launch the Received Power Scan Window as shown in Figure 26 Figure 26. Si4712/13 Received Power Scan Window 28 Preliminary Rev. 0.
Si471x-EVB 6.8. Si47xx GUI - Radio Data Service (RDS) Window The RDS/RBDS feature is only available in the Si4711/13 part and the Si47xx GUI allows user to evaluate the RDS/RBDS transmission on these parts. This user guide assumes that the user is already familiar with the RDS/RBDS standard. User may refer to the following documents if needs to be familiar with the RDS/RBDS standard: 1. United States RBDS Standard by National Radio Systems Committee, April 9, 1998. 2.
Si471x-EVB Figure 28. RDS Transmit Window Table 7. RDS Window Explanations Item Explanation General RDS / RBDS Selection Program Type (PTY) PTY Dynamic PI Select either RDS format (Europe) or RBDS format (US). Select the available Program Type (PTY) from the pulldown menu. Select whether the PTY will be dynamic or static. Enter Program Identification (PI) code here. Program Service Program Service Boxes Load Messages Load the PS messages to the Si4711/13 chip.
Si471x-EVB Table 7. RDS Window Explanations Item Stereo Audio Compression Explanation Part of RDS Group Type 0 (PS): Enter whether the transmitted audio is Stereo or Mono. Part of RDS Group Type 0 (PS): Enter whether the Audio Compression is On or Off. Traffic Program Part of RDS Group Type 0 (PS): Enter whether Traffic Program is available or not. Traffic Announcement Part of RDS Group Type 0 (PS): Enter whether Traffic Announcement is available or not.
Si471x-EVB There are 16 different group types in the RDS/RBDS standard, and for every group the following information is always transmitted: 1. Program Identification (PI) 2. Program Type (PTY) The Si47xx GUI makes it easy to send data in 3 of the following group types: 1. Group Type 0: Program Service (PS) 2. Group Type 2: Radio Text (RT) 3. Group Type 4: Clock Time (CT) It is possible to send data in the other group types, but the user has to manually enter the data in hexadecimal code.
Si471x-EVB 6.8.1. Basic The RDS Transmit Window is divided into three categories: 1. General 2. Program Service 3. Buffers In the basic section, we will cover two out of the three categories, which are the General and Program Service. In the General category the user can set the PI and PTY data, while in the Program Service user will set the PS data (Group Type 0). The following diagram shows a step-by-step explanation of how to do it: 1 3 2 4 5 Figure 29. Basic RDS Sending Message Illustration 1.
Si471x-EVB 6.8.2. Intermediate In the intermediate section, we will cover the buffers category of sending the RDS data with the Si4711/13, in particular we will send Group Type 2 (Radio Text) and Group Type 4 (Clock Time). The following diagram shows a step-by-step procedure to send the buffers data in addition to the General and Program Service data covered in the basic section. 1 2 3a 3 5 6 4 Figure 30. Intermediate RDS Sending Message Illustration 1.
Si471x-EVB 6.8.3. Advanced 1 2 3 4 5 6 8 7 9 Figure 31. Advanced RDS Sending Message Illustration 1. Dynamic: This tells whether the PTY code is static or dynamic. 2. Alternate Frequency: This provides the ability to inform the receiver of a single alternate frequency. This field is transmitted along with the Group Type 0 (PS). 3. Miscellaneous bits in Group Type 0 (PS): a. Artificial Head: 0 = Not Artificial Head, 1 = Artificial Head b. Stereo: 0 = Mono, 1 = Stereo c.
Si471x-EVB 7. Schematics Figure 32. Si471x Baseboard - Block Diagram 7.1. Si471x Baseboard 36 Preliminary Rev. 0.
Figure 33. Si471x Baseboard - Daughter Card Interface Si471x-EVB Preliminary Rev. 0.
Figure 34. Si471x Baseboard - Signal Multiplexers Si471x-EVB 38 Preliminary Rev. 0.
Figure 35. Si471x Baseboard - CODEC Si471x-EVB Preliminary Rev. 0.
Figure 36. Si471x Baseboard - Audio Input and SPDIF Translator Si471x-EVB 40 Preliminary Rev. 0.
Figure 37. Si471x Baseboard - MCU Si471x-EVB Preliminary Rev. 0.
Figure 38. Si471x Baseboard - Power Supply Si471x-EVB 42 Preliminary Rev. 0.
Si471x-EVB Figure 39. Si471x Daughter Card 7.2. Si471x Daughter Card 43 Preliminary Rev. 0.
Figure 40. Daughter Card Headphone Schematic (applies only to Si472x) Si471x-EVB 44 Preliminary Rev. 0.
Si471x-EVB 8. Layout 8.1. Si471x Baseboard Figure 41. Si471x Baseboard - Primary Assembly Silkscreen Figure 42. Si471x Baseboard - Secondary Assembly Silkscreen 45 Preliminary Rev. 0.
Si471x-EVB Figure 43. Si471x Baseboard - Primary Side Figure 44. Si471x Baseboard - Ground Plane 46 Preliminary Rev. 0.
Si471x-EVB Figure 45. Si471x Baseboard - Power Plane Figure 46. Si471x Baseboard - Secondary Side 47 Preliminary Rev. 0.
Si471x-EVB 8.2. Si471x Daughter Card Figure 47. Si471x Daughter Card - Primary Assembly Silkscreen Figure 48. Si471x Baseboard - Secondary Assembly Silkscreen 48 Preliminary Rev. 0.
Si471x-EVB Figure 49. Si471x Baseboard - Primary Side Figure 50. Si471x Baseboard - Ground Plane 49 Preliminary Rev. 0.
Si471x-EVB Figure 51. Si471x Baseboard - Power Plane Figure 52. Si471x Baseboard - Secondary Side 50 Preliminary Rev. 0.
Si471x-EVB 9. Bill of Materials Table 8. Si47xx Baseboard Rev1.3 - Bill of Materials Item Qty REFDES Description Value MFG/Vendor MFG/Vendor_PN 2.1 mm power plug CAP,SM,0402,0.1UF,10% 0.1 UF CUI VENKEL CONN_PJ-01 C0402X7R160-104KNE RADIAL CAP CAP,SM,0805 CAP,SM,7343,15UF,10% CAP,SM,0603,1UF,X7R 4.7 UF 0.
Si471x-EVB Table 8. Si47xx Baseboard Rev1.
Si471x-EVB Table 9. Si471x-EVB Daughter Card Rev1.2 - Bill of Materials Item Qty REFDES Description Value MFG/Vendor MFG/Vendor_PN 1 2 3 4 5 6 7 8 9 10 11 2 1 1 1 2 1 1 3 2 1 1 C4,C6 C2 C7 C10 C3,C5 C1 C9 C11,C12,C13 C14,C15 C17 J1 22 PF 22 NF 0.1 UF 0.1 UF 0.
Si471x-EVB DOCUMENT CHANGE LIST Revision 0.2 to Revision 0.3 Updated Section “4. Recommended Hardware Setup” to include digital input support. Updated Section “5. Getting Started - Software Installation (Firmware 1.B)” to include digital input support. Updated Section “6. Development Using Si471x GUI (Firmware 1.B)” to include digital input properties. Revision 0.3 to Revision 0.4 Added RDS feature. Added Limiter feature. Added Overmodulation Indicator. Updated all schematics and layout images.
Si471x-EVB NOTES: Preliminary Rev. 0.
Si471x-EVB CONTACT INFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Email: FMinfo@silabs.com Internet: www.silabs.com The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice.