Silicon Labs Si4704, Si4703, Si4705, Si4706, Si4707 User Manual

Si47xx-EVB

Si47XX EVALUATION BOARD USER’S GUIDE

1. Introduction

Thank you for purchasing the Silicon Laboratories, Inc. Si47xx Evaluation Board (EVB). The EVB and associated software have been designed to speed up the overall development process. We look forward to working with you, and have posted support articles, answers to frequently asked questions, and application notes at

www.mysilabs.com. Table 1 describes all of the available products and features in the Si47xx family.

Table 1. Product Family Function

Part Number General Description

Si4700 FM Receiver Si4701 FM Receiver with RDS Si4702 FM Receiver Si4703 FM Receiver with RDS Si4704 FM Receiver Si4705 FM Receiver with RDS Si4706 High Performance RDS Receiver Si4707 WB Receiver with SAME Si4710 FM Transmitter Si4711 FM Transmitter with RDS Si4712 FM Transmitter with RPS Si4713 FM Transmitter with RDS & RPS Si4720 FM Transceiver Si4721 FM Transceiver with RDS Si4730 AM/FM Receiver Si4731 AM/FM Receiver with RDS Si4734 AM/SW/LW/FM Receiver Si4735 AM/SW/LW/FM Receiver with RDS Si4736 AM/FM/WB Receiver Si4737 AM/FM/WB Receiver with RDS Si4738 FM/WB Receiver Si4739 FM/WB Receiver with RDS Si4740 AM/FM Receiver Si4741 AM/FM Receiver with RDS Si4742 AM/LW/FM/WB Receiver Si4743 AM/LW/FM/WB Receiver with RDS Si4749 High-Performance RDS Receiver

RDS

FM Receiver

FM Transmitter

333 3333 3 333 3 3333 33 333 33 33333

AM Receiver

3 33 3 33 33 33 33 3333

33 33 3 3 333 333 3 3 33 3 33 33 3 33 333 3 33 3 33 3 3 3 33 33

LW LW

WB Receiver

SW/LW Receiver

33

33 33 3 3

RPS

SAME

Digital Input

Digital Output

Package Size (mm)

AEC-Q100 Qualified

High Performance RDS

33

Embedded FM antenna

4x4 4x4 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 3x3 4x4 4x4 4x4 4x4 4x4

Si4706, Si4707, and Si474x are under non-disclosure agreement (NDA). Refer to Si4706/07/4x-EVB User’s Guide for information on these parts.

Si47xx-EVB TABLE OF CONTENTS

1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

2. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.1. Si47xx Baseboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

2.2. Si47xx Daughtercards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3. Recommended Hardware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.1. Hardware Setup for FM Transmitter Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

3.2. Hardware Setup for FM or Weather Band Receiver Test . . . . . . . . . . . . . . . . . . . . .27

3.3. Hardware Setup for AM Receiver Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

4. Getting Started—Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

5. FM Transmitter GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

5.1. Configuring the Si47xx as an FM Transmitter Using Analog Audio Input . . . . . . . . .30

5.2. Configuring the Si47xx as an FM Transmitter Using Digital Audio with Analog Audio

Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

5.3. Configuring the Si47xx as an FM Transmitter Using Digital Audio with SPDIF Digital

Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

5.4. FM Transmitter Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

5.5. FM Transmitter Settings (Analog Mode) Property Window . . . . . . . . . . . . . . . . . . . .35

5.6. FM Transmitter Settings (Digital Mode) Property Window . . . . . . . . . . . . . . . . . . . .37

5.7. CODEC Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

5.8. SPDIF Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40

5.9. FM Transmitter Receive Power Scan Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41

5.10. FM Transmitter Radio Data Service (RDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

5.11. FM Transmitter Register Map Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

6. FM Receiver GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

6.1. Configuring the Si47xx as an FM Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50

6.2. FM Receiver Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51

6.3. FM Receiver Settings Property Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

6.4. CODEC and SPDIF Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

6.5. FM Receiver RDS Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57

6.6. FM Receiver RDS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

6.7. FM UI Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62

6.8. FM Receiver RSSI/SNR Graph Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63

6.9. FM Receiver Register Map Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64

7. Weather Band GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65

7.1. Configuring the Si4736/37/38/39 as Weather Band Receiver . . . . . . . . . . . . . . . . . .65

7.2. Weather Band Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

7.3. Weather Band Settings Property Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

7.4. Weather Band Receiver RSSI/SNR Graph Window . . . . . . . . . . . . . . . . . . . . . . . . .68

7.5. Weather Band Receiver Register Map Window . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

2 Rev. 0.4

Si47xx-EVB

8. AM Receiver GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

8.1. AM Receiver Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

8.2. AM Receiver Main Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

8.3. AM Receiver Property Settings Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

8.4. AM Receiver RSSI/SNR Graph Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75

8.5. AM Receiver Register Map Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76

9. Using the EVB with a 9 V Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

10. Debugging Guidelines for Si47xx EVB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78

11. Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

12. Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

12.1. Si47xx-EVB Baseboard Rev 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

12.2. Si471x/2x-EVB Daughtercard Rev 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94

12.3. Si473x-EVB Daughtercard Rev. 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

12.4. Antenna Card Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98

13. Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

13.1. Si47xx-EVB Baseboard Rev 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100

13.2. Si471x/2x-EVB Daughtercard Rev 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103

13.3. Si473x-EVB Daughtercard Rev 1.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106

13.4. Antenna Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Documentation Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115

Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116

Rev. 0.4 3

Si47xx-EVB

This user's guide contains information related to only the Si47xx EVBs itemized in Table 2. Table 2 serves as a quick reference guide for the sections of interest for your EVB. Sections 1, 4, 9, and 10 of the document apply to all EVBs.

Table 2. Quick Reference Guide

Part Description Recommended

GUI Bill of Materials Schematics Layout

HW Setup

Si4704/05

Si4710/11/

12/13

Si4720/21

Si4730/31

Si4734/35

Sections 2.1.,

2.2.1. Sections 2.1.,

2.2.2., 2.2.3.,

2.2.4., 2.2.5. Sections 2.1.,

2.2.2., 2.2.3.,

2.2.4., 2.2.5.

Section 3.2. Section 6. Section 11. Tables

24 and 25

Section 3.1. Section 5. Section 11. Tables

24 and 25

Sections 3.1. and 3.2.

Sections 3.2. and 3.3.

Sections 5. and 6.

Sections 6. and 8.

Section 11. Tables 24 and 25

Section 11. Tables 24, 26, 27, 28, 29

Section 11. Tables 24, 26, 30

Sections 12.1.,

12.2. Sections 12.1.,

12.2.,12.3.,

12.4.1., 12.4.2. Sections 12.1.,

12.3., 12.4.1.,

12.4.3.

Sections

13.1., 13.2. Sections

13.1., 13.2.

Sections

13.1., 13.3.,

13.4.1.,

13.4.3.

Si4736/37

Sections 2.1.,

2.2.2., 2.2.3.,

2.2.4., 2.2.5.

Sections 3.2. and 3.3.

Sections 6.,

7., and 8.

Section 11. Tables 24, 26, 30

Sections 12.1.,

12.3., 12.4.3.

Sections

13.1., 13.3.,

13.4.1.,

13.4.3.

Si4738/39

Sections 2.1.,

2.2.2., 2.2.3.,

2.2.4., 2.2.5.

Sections 3.2. and 3.3.

Sections 6., and 7.

Section 11. Tables 24, 26, 30

Sections 12.1.,

12.3., 12.4.3.

Sections

13.1., 13.3.,

13.4.1.,

13.4.3.

*Note: Si4706, Si4707, and Si474x are under non-disclosure agreement (NDA). Refer to Si4706/07/4x-EVB User’s Guide for

information on these parts.

There are four different EVB kits within the Si47xx family. Each kit ships with a unique set of components depending on the Si47xx product.

The Si470x EVB kit ships with the following items:

 Si470x FM Receiver customer welcome and evaluation letter  Si47xx Baseboard revision 1.3 or later  Si471x/2x Daughterboard revision 1.2 or later with Si4705  EVB Characterization Report  USB cable  RCA cable  Adapters - BNC plug to RCA jack  9 V battery  Headphones  Si470x CD including:

 Data sheet  Development application GUI rev 2.5.4 or later  FM receiver firmware rev 1.0 or later  User's guide

4 Rev. 0.4

 Quick start guide

The Si471x EVB kit ships with the following items:

 Si471x FM Transmitter customer welcome and evaluation letter  Si47xx Baseboard revision 1.3 or later  Si471x/2x Daughterboard revision 1.2 or later with Si471x  EVB Characterization Report  USB cable  RCA cable  Adapters—BNC plug to RCA jack  9 V battery  Si471x CD including:

 Data sheet  Development application GUI rev 2.5.4 or later  FM transmitter firmware rev 1.0 or later  User's guide  Quick start guide

Si47xx-EVB

Rev. 0.4 5

Si47xx-EVB

The Si472x EVB kit ships with the following items:

 Si472x FM Transceiver customer welcome and evaluation letter  Si47xx Baseboard revision 1.3 or later  Si471x/2x Daughterboard revision 1.2 or later with Si472x  EVB Characterization Report  USB cable  RCA cable  Adapters - BNC plug to RCA jack  9 V battery  Headphones  Si472x CD including:

 Data sheet  Development application GUI rev 2.5.4 or later  FM transmitter firmware rev 2.0 or later  FM receiver firmware rev 1.0 or later  User's guide  Quick start guide

The Si473x EVB kit ships with the following items:

 Si473x AM/FM Receiver customer welcome and evaluation letter  Si47xx Baseboard revision 1.3 or later  Si473x Daughterboard revision 1.2 or later  SL4X30MW100T Ferrite Antenna Board revision 1.1 (Si4731 only)  SL5X7X100MW70T Ferrite Antenna Board revision 1.1 (Si4731 only)  SL9X5X4MW7F Airloop Antenna Board revision 1.1 (Si4731 only)  AM/FM/SW Antenna Board revision 1.3 (Si4735 only)  AM/FM/WB Antenna Board revision 1.3 (Si4737/39 only)  USB cable  RCA cable  Adapters - BNC plug to RCA jack  9 V battery  Headphones  Loop antenna (Si4731 only)  Whip antenna (Si4735/7 only)  Si473x CD including:

 Data sheet  Development application GUI rev 2.8.6 or later  AM receive firmware revision 1.0 or later  FM receiver firmware revision 1.0 or later  Weather band receiver firmwar e revision 0.A or later (Si4737/39 only)  User's guide  Quick start guide

6 Rev. 0.4

Si47xx-EVB

2. Description

Si47xx EVB consists of a baseboard, a daughtercard with the Si47xx part pre-mounted, and, if applicable, an antenna card. The baseboard is common and shared among all Si47xx EVBs. The following sections refer to both the images in the figures and the silkscreen on the Si47xx EVB. Please refer to both when using this guide.

2.1. Si47xx Baseboard

J6

J27

J30

J52 J57

X1

J54

J75

J79 SW1 J78

U22 D1

J74 PB1

Figure 1. Baseboard Connectors, Jumpers, and Devices

Baseboard power connectors/devices:

J79 USB connector (using USB power) J78 External power connector J77 Battery connector J76 Terminal block (TB) power connector SW1 Switch to select between USB power or Ext power J61 Jumper: Baseboard power select (3.3 V or TB) J68 Jumper: Si47xx VIO power select (3.3 V or adjustable voltage via R73 or TB) J69 Jumper: Si47xx VDD power select (3.3 V or adjustable voltage via R74 or TB)

J61 J68

J69

J76

J77

Rev. 0.4 7

Si47xx-EVB

Baseboard audio I/O connectors:

J6 RCA output J30 Line output

Baseboard clock connectors/devices:

X1 32.768 kHz crystal oscillator J52 Solder bump: select internal RCLK from oscillator J54 Ext RCLK SMA connector input J57 Jumper: Enable or Disable Int RCLK

Baseboard MCU connectors/devices:

U22 C8051F342 MCU J79 USB connector to communicate with the MCU J74 JTAG connector for the MCU PB1 Push button to reset the MCU D1 LED to confirm power supply to the MCU

Baseboard to daughterboard connectors:

J27 Si47xx daughtercard connector J75 Expansion card connector (reserved)

2.1.1. Power Supply Network

J79

USB

J78

EXT

J77

BATT

SW1

1.25–3.9 V

LDO

+3.3 V

(U17)

LDO

(R73)

LDO

1.25–7 V (R74)

Jumper

J69

Jumper

ADJ

Jumper

J68

+3.3 V

TB

Gnd

Terminal

Block (TB)

J61

ADJ

Vdd

J76

+3.3 V

TB

Vio

Vmcu

+3.3 V

Vm

TB

VIO

VDD

Daughterboard

Si47xx

11

10

VIO

VDD

8 Rev. 0.4

Figure 2. Power Supply Block Diagram

Si47xx-EVB

The Si47xx EVB can be powered using one of the following power supply options:

1. USB power supply via J79

2. External dc (Ext DC) power supply via power jack J78 or battery via J77

3. Three separate power supplies (Vdd, Vio, Vmcu) via terminal block J76

The EVB has three supply rails: Vdd, Vio, and Vmcu. Vdd and Vio are routed directly to the daughterboard to power the Vdd and Vio pins on the Si47xx chip, while Vmcu is used to power the baseboard.

The external dc power supply and battery should not be connected simultaneously. Refer to Section 9. "Using the EVB with a 9 V Battery‚" on page 77 for more information.

USB Power Supply & EXT DC Power Supply

Switch SW1 is used to select between the USB power supply and Ext dc power supply. The USB power supply or the Ext dc power supply can be configured in one of the following two modes:

1. Fixed +3.3 V

2. Adjustable Vdd and Vio

Fixed +3.3V

Only one LDO is used in this mode which outputs a +3.3 V supply to all three rails (Vdd, Vio, and Vmcu). The jumpers need to be set according to Figure 3 to use the EVB in this configuration. This is the default configuration on the EVB.

Vio Vdd Vmcu

ADJ

+3.3V

TB

ADJ J69J68

+3.3V

TB

J61

+3.3V

Figure 3. Default Fixed +3.3 V Jumpers Setting

Terminal Block Power Supply

If the terminal block supplies are used, then jumpers J61, J68, and J69 need to be set according to Figure 4. The user then needs to connect three different power supp lies for Vdd, Vio, and Vmcu.

Vio Vdd Vmcu

+3.3V

ADJ

TB

J68 J61

ADJ J69

+3.3V

TB

+3.3V

Figure 4. Terminal Block Jumpers Setting

Rev. 0.4 9

Si47xx-EVB

2.1.2. Microcontroller

TC_BCLK

(reserved for digital Rx )

Jumper

J41

Daughterboard

S_GPO3/DCLK SD_GPO1

RST~

GPO1

19 18 17

Si47xx

5

6 7 8

SEN~

SCLK

GPO3/

GPO2

SDIO

DCLK

PB1

Reset

J79

USB

JTAG

J74

MCU

C8051F342

MD_GPIO3

MS_GPIO2

MD_GPIO1

Jumper

J65

MD_GP4

MS_RSTB

MS_SENB MS_SCLK MS_SDIO

Figure 5. MCU Block Diagram

The Si47xx EVB uses a Silicon Laboratories' C8051F342 microcontroller to control the Si47xx and to provide USB connectivity from the host PC (via connector J79). The LED D1 illuminates to confirm that power is being properly supplied to the C8051F342 and firmware has loaded. Push-button PB1 manually reset s the C8051F342. Th e JTAG connector J74 is used to program the C8051F342 at production time, and is not required thereafter.

10 Rev. 0.4

Si47xx-EVB

2.1.3. Reference Clock

Daughterboard

Jumper

J57

DIS_INT_RCLK

The Si47xx 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 onboard oscillator and bringing in the reference clock from an external source through SMA connector J54.

When the user chooses to provide an external RCLK, jumper J52 has to be set accordingly. The user has the option to turn off the onboard crystal oscillator by installing jumper J57.

2.1.4. Audio I/O

X1

32.768 kHz INT RClk

Jumper

INT_RCLK

J52

EXT_RCLK

J54

EXT

RClk

Figure 6. Reference Clock Block Diagram

Si47xx

9

RCLK

EVB In (TX only) 47xx Audio2 47xx Audio1 EVB Out (RX only)

TX: Analog/Digital In TX: Analog In TX: Digital In RX: Analog/Digital Out

J7

RCA In

J19

Line In (white)

J19

SPDIF In

(white)

Jumper J5&J13

CODEC IN

LINE IN

S/PDIF IN

SPDIF IN

DOUT

0

1

Digital Input Select

To_TX

RX: Digital Out RX: Analog Out

Audio2 Select

1

0

AUDIO2

16

LIN/ DFS2

15

RIN/ DOUT

AUDIO1

LOUT/ DFS1

ROUT/ DIN

14 13

Si47xx

Jumper

J45

AUDIO2

From_RX

(Daughterboard)

To_TX

0

1

AUDIO1

Jumper

J44

Audio1 Select

From_RX

CODEC OUT

LINE

DIN

OUT

S/PDIF OUT

SPDIF

DIN

OUT

RCA Out

0

1

Line Out

(black)

SPDIF Out

(black)

Note: Jumper J44 and J45 are automatically configured in EVB Rev 1.3.

Figure 7. Audio I/O Block Diagram

J6

J30

Rev. 0.4 11

Si47xx-EVB

The EVB supports three different kinds of configurations for the FM transmitter:

 Analog In to Analog In  Analog In to Digital In  Digital In to Digital In

Analog In to Analog In: This configuration provides a way for the user to evaluate the analog audio input for FM transmission.

The input to the EVB is an analog audio provided via the RCA input connector J7 or LINE In connector J19 (white). Jumpers J5 and J13 are set to RCA input by default. The user has to change this jumper accordingly if LINE In is being used. Then the analog audio inpu t is routed directly through a switch to the Si47xx Rin/Lin inputs pin 15 and 16 (Audio2).

Analog In to Digital In: This configuration provides a way for the user to evaluate the Si4 7xx digit al audio input for FM transmission using an analog audio input.

The input to the EVB is an analog audio provided via the RCA input connector J7 or LINE In connector J19 (white). Jumpers J5 and J13 are set to RCA input by default. The user has to change this jumper accordingly if LINE In is being used. Then the analog audio input is converted by CODEC U10 to a serial audio digital data before it is routed to the Si47xx digital audio input DIO and DFS pin 13 and 14 (Audio1). The DCLK input is routed to the GPO3/DCLK pin 17. Make sure that jumper J41 is set to DCLK to ensure proper operation.

Digital In to Digital In: This configuration provides a way for the user to evaluate the Si47xx digital audio input for FM transmission using S/PDIF digital audio commonly found in sound cards.

The input to the EVB is a digital S/PDIF data provided via the S/PDIF In connector J19 (white). The digital S/PDIF input is converted by S/PDIF Translator U9 to a serial audio digital data before it is routed to the Si47xx digital audio input DIO and DFS pin 13 and 14 (Audio1). The DCLK input is routed to the GPO3/DCLK pin 17. Make sure that jumper J41 is set to DCLK to ensure proper operation.

The EVB supports analog and digital mode for receiver operation:

Analog Out to Analog Out: This configuration provides a way for the user to evaluate the analog audio output for receiver operation. The output of the Si47xx is routed to RCA output connector J6 and Line output connector J30.

Digital Out to Digital and Analog Out: This configuration provides a way for the user to evaluate the digital audio output for FM and AM receive using either S/PDIF digital audio or analog audio through the onboard CODEC. The Si47xx digital audio out is routed through the S/PDIF translator µ9 to S/PDIF output connector J30 and routed through the CODEC to RCA output connector J6 and line output connector J30.

Digital and Analog Out: This configuration provides a way for the user to evalua te the analog audio out an d digital audio using S/PDIF digital audio for FM and AM. The analog output of the Si47xx is routed to RCA output connector J6 and line output connector J30 and the digital audio out is routed through the S/PDIF translator to S/ PDIF output connector J30.

12 Rev. 0.4

Si47xx-EVB

IMPORTANT: Jumper Settings

Because of the many possibilities available to configure the EVB, ensure that these four jumpers are set accordingly:

1. J41: GPO3/DCLK setting

2. J44: TX/RX setting for Audio1 I/O (automatically set by the GUI for baseboard 1.3 and later)

3. J45: TX/RX setting for Audio2 I/O (automatically set by the GUI for baseboard 1.3 and later)

4. J5, J13: Analog Audio Source, RCA or Line In

J41: GPO3/DCLK Setting

Upper—DCLK digital audio clock Lower—GPO3 digital control signal For configuring the Si47xx digital audio input, make sure that the jumper is set in the Upper position so that the

DCLK signal will be routed to the Si47xx.

J44: TX/RX Setting for Audio1 I/O (automatically set by the GUI for baseboard 1.3 and later)

Upper—Audio1 is set to FM transmit (pin 13 and 14 will be the digital audio input). Lower—Audio1 is set for FM receive (pin 13 and 14 will be analog/digital audio output).

J45: TX/RX Setting for Audio2 I/O (automatically set by the GUI for baseboard 1.3 and later)

Upper—Audio2 is set to FM transmit (pin 15 and 16 will be the analog/digital audio input). Lower—Audio2 is set for FM receive (pin 15 and 16 will be the digital audio output).

J5, J13: Analog Audio Source, RCA or Line In

Upper—RCA inputs are used for analog audio source. Lower—Line inputs are used for analog audio source.

Rev. 0.4 13

Si47xx-EVB

2.2. Si47xx Daughtercards

2.2.1. Si471x/2x Daughtercard

Figure 8. Si471x/2x Daughterboard Connectors and Devices

Daughterboard Connectors and Components:

U1 Si472x FM Transceiver or Si470x FM Receiver or Si471x FM Transmitter L2 Tuning Inductor R2 0 Ω resistor to connect FM TX output to 10 cm trace built-in antenna C8 2 pF capacitor to connect FM TX output to J1 SMA connector R4 50 Ω termination resistor J1 SMA connector for FM transmitter output J2 Header for putting external antenna for FM transmitter J28 SMA connector for FM receiver input J29 Headphone jack for FM receiver

14 Rev. 0.4

Si47xx-EVB

Figure 9. Fully Assembled Si471x/2x EVB

Si470x/1x/2x EVBs use Si471x/2x daughtercard with different population options depending on the individual Si470x/1x/2x part. Please refer to individual Bill of Materials for each board.

2.2.1.1. FM Transmitter

The Si471x/2x (U1) and its bypass capacitors and tuning inductor (L2) are located on the daughtercard. The FM transmit output can be configured in three different ways:

 Built-in antenna  External antenna  RF output

Built-In Antenna

The built-in PCB trace antenna is pre-configured as the default antenna.

External Antenna

To use an external antenna, remove resistor R2. Put the external antenna in the J2 header connector.

RF Output

The FM RF output will be available through the SMA connector J1. Refer to “AN383: Antenna Selection and Universal Layout Guidelines” for a more complete study of the antenna

interface for the Si471x/2x as an FM transmitter. Table 3 provides the attenuation factors across the FM band when measuring the output at J1 with a 50 Ω load.

Table 3. FM Band Attenuation Factors

Frequency (MHz) Attenuation (dB)

76 32.13 88 30.91 98 30.00

108 29.20

Rev. 0.4 15

Si47xx-EVB

2.2.1.2. FM Receiver

As an FM receiver, the FM input can be configured in three ways:

 Built-in antenna  Headphone antenna  RF input

Built-In Antenna

The built-in PCB trace antenna is available by default.

Headphone Antenna

To use a headphone antenna, connect the headphone to the headphone jack J29 that is on the daughtercard. The daughtercard also includes a headphone amplifier, which enables the user to listen to the audio output via the headphone connected to J2 9.

RF Input

To evaluat e t he per form ance of the Si4 70x /2x as an F M receiver, connect the FM generator to the SMA connector J28. The RF input is connected in parallel with the headphone antenna. To disconnect the RF input to eliminate possible sources of interference, remove C9.

2.2.2. Si473x Daughtercard

Figure 10. Si473x Daughterboard Connectors and Devices

16 Rev. 0.4

Daughterboard connectors and components:

J1 SMA connector for AM test circuit J2 Header for antenna interface connection J24 Headphone jack J26 SMA connector for FM test circuit L4 270 nH inductor for FM input U1 Si473x AM/FM/SW Weather Band Receiver chip C2 Vdd bypass capacitor C3 FM test circuit ac coupling capacitor C8 AM input ac coupling capacitor C12 FM input ac coupling capacitor C13 AM test circuit ac coupling capacitor

Si47xx-EVB

Figure 11. Fully Assembled Si473x-EVB (no antenna cards)

Rev. 0.4 17

Si47xx-EVB

Figure 12. Fully Assembled Si473x-EVB with Ferrite Antenna Card

The daughtercard implements the Si473x AM/FM receive solution. The AM interface allows the user the option to choose between a ferrite loop stick antenna and an airloop antenna. The user can also configure the daughterboard to use the AM test circuit for Si473x AM character ization. Th e FM interface allows th e user to att ach a headphone for the antenna interface or use the FM test circuit input for Si473x FM characterization. Individual SW and weather band antenna cards provide the option of using a whip antenna for reception.

2.2.3. Si473x AM/FM/SW Weather Band Receiver Chip

The Si473x (U1) along with its bypass capacitor is located on the daughterboard. The front-end circuit of the daughterboard includes antenna interfaces and test circuits for AM and FM reception followed by ac coupling capacitors going into the AM and FM inputs of the Si473x.

18 Rev. 0.4

2.2.4. Antenna Interfaces

2.2.4.1. AM Antenna Interface

Si47xx-EVB

Figure 13. Antenna Board Options—SL4X30MW100T Ferrite, SL5X7X100MW70T Ferrite, and

SL9X5X4MWTF Airloop

The user has the flexibility of choosing one of the two available antenna options. The user can either decide to use the airloop antenna or the ferrite loop stick antenna.

Rev. 0.4 19

Si47xx-EVB

2.2.4.1.1. Ferrite Loop Stick Antenna

A ferrite loop stick antenna can be used with the Si473x by connecting the ferrite antenna board as shown in Figure 14.

J24

Head

Phone Jack/FM Antenna

FM Input

Buffers

C12

C3

L4

C13

C8

Daughterboard

2

FM Input

3

RFGND

4

AM Input

Analog

Audio Out

LOUT

ROUT

Si473x

Digital*

Audio Out

GPO3/DCLK

DFS

DOUT

U1

*Note: Si4731/5/7/9 only

with FW 2.0 or higher

14 13

17 16 15

Ferrite Loop

Stick Antenna

Board

J2

J26

SMA IN

FM

Test

Circuit

J1

AM

Test

Circuit

Figure 14. Ferrite Loop Stick Antenna Interface for AM Reception on the Si473x Daughterboard

The Si473x accepts a wide range of ferrite loop sticks from 180 to 600 µH with no manual alignment necessary. To test a specific ferrite loop stick, install the individual ferrite antenna board.

20 Rev. 0.4

Si47xx-EVB

2.2.4.1.2. Airloop Antenna

An airloop antenna can be used by connecting the airloop antenna board as shown in Figure 15.

J24

Head

Phone Jack/FM Antenna

FM Input

Buffers

C12

C3

L4

C13

C8

Daughterboard

2

FM Input

3

RFGND

4

AM Input

Analog

Audio Out

LOUT

ROUT

Si473x

Digital*

Audio Out

GPO3/DCLK

DFS

DOUT

U1

*Note: Si4731/5/7/9 only

with FW 2.0 or higher

14 13

17 16 15

Airloop

Antenna

Airloop Antenna

Board

J2

J26

SMA IN

FM

Test

Circuit

J1

AM

Test

Circuit

Figure 15. Airloop Antenna Interface for AM Reception on the Si473x Daughterboard

The airloop antenna board has a transformer, U1. The purpose of the transformer is to gain up the inductance from the airloop for proper operation. Using a 1:5 turn ratio inductor, the inductance is increased by 25 times and easily supports all typical AM airloop antennas, which generally vary between 10 and 20 µH.

Rev. 0.4 21

Si47xx-EVB

2.2.4.2. FM Antenna Interface

J24

Head

Phone

Jack/FM

Antenna

Buffers

FM Input

C12

C3

L4

C13

C8

Daughterboard

2

FM Input

3

RFGND

4

AM Input

Analog

Audio Out

LOUT

ROUT

Si473x

Digital*

Audio Out

GPO3/DCLK

DFS

DOUT

U1

*Note: Si4731/5/7/9 only

with FW 2.0 or higher

14 13

17 16 15

J2

J26

SMA IN

FM

Test

Circuit

J1

AM

Test

Circuit

Figure 16. Headphone Antenna Interface for FM Rece ption on the Si473x Daughterboard

The FM input on the Si473x is a single-ended input and uses the headphone jack with headphones connected to provide an antenna for FM reception. Please refer to "A N3 83 : Ante nn a Sele ction a nd Un iversa l Layo ut Gu ide lines" for more information.

22 Rev. 0.4

2.2.4.3. SW and Weather Band Antenna Interface

Figure 17. SW/WB Antenna Card (SW population option shown)

Si47xx-EVB

Figure 18. Fully Assembled Si473x-EVB with SW/WB Antenna Card

The BNC connector, J2, will be used to connect a whip antenna for shortwave, FM, and weather band reception. For SW reception, switch S1 must be in the SW position . The ferrite bar is used for AM reception, and the switch S1 must be in the AM position for AM reception.

When using the WB Antenna Card, WB reception is through the whip antenna. For a better listening experience, plug the headphones to J30 rather than J24.

Note: LW no t supported with SW/WB Antenna Card.

Rev. 0.4 23

Si47xx-EVB

2.2.5. Test Circuit Interfaces

2.2.5.1. AM/LW/SW Test Circuit Interface

J24

Head

Phone Jack/FM Antenna

FM Input

Buffers

C12

C3

L4

C13

C8

Daughterboard

2

FM Input

3

RFGND

4

AM Input

Analog

Audio Out

LOUT

ROUT

Si473x

Digital*

Audio Out

GPO3/DCLK

DFS

DOUT

U1

*Note: Si4731/5/7/9 only

with FW 2.0 or higher

14 13

17 16 15

J2

J26

SMA IN

FM

Test

Circuit

J1

AM

Test

Circuit

Figure 19. Test Circuit Interface for the Si473x Daughterboard

The antenna cards must be disconnected during AM test ing with J1. For best sensitivity measurem ents, disconnect C8 to eliminate possible noise sources.

24 Rev. 0.4

2.2.5.2. FM/Weather Band Test Circuit Interface

J24

Head

Phone Jack/FM Antenna

FM Input

Si47xx-EVB

Buffers

C12

C3

L4

C13

C8

Daughterboard

2

FM Input

3

RFGND

4

AM Input

Analog

Audio Out

LOUT

ROUT

Si473x

Digital*

Audio Out

GPO3/DCLK

DFS

DOUT

U1

*Note: Si4731 only with

FW 2.0 or higher

14 13

17 16 15

J2

J26

SMA IN

FM

Test

Circuit

J1

AM

Test

Circuit

Figure 20. FM Test Circuit on the Si473x Daughterboard

The user does not need to do anything to setup the FM test circuit other than to make sure that the headphone is disconnected. The test circuit is connected in parallel with the headphone antenna. To eliminate possible sources of interference, remove C12.

Rev. 0.4 25

Si47xx-EVB

3. Recommended Hardware Setup

The Si47xx-EVB can be configured for FM transmit, FM receive, weather band receiver, or AM/SW receive. The following is a description of how to correctly configure the device for either mode of operation.

3.1. Hardware Setup for FM Transmitter Test

Analyzer

SMA Cable

FM OUT RCA IN

RF

J1

Si471x/2x

Daughterboard

Si47xx

Baseboard

FM IN

J28

J6

RCA OUT

Jumpers

Setting

DCLK

GPIO3

Note: J44 and J45 are

automatically configured in

EVB Rev1.3 and later

J41

TX

RX

J44 J45

USB

EXT pwr

Generator

TX RX

SW1

Analog

Audio

RCA Cable

J7

J19

J30

J76

S/PDIF

Audio

Generator

Terminal

Block (TB)

J79

USB pwr

J78

EXT Jack

USB Cable

PC

w/ USB

port

Figure 21. Hardware Setup for FM Transmitter Test

1. Connect the USB cable from PC to the EVB USB connector J79. The USB connection will serve as a dual purpose: supplying the power to the EVB and controlling the EVB.

2. Connect an analog audio generator to the RCA input connector J7 using an RCA cable or connect an SPDIF digital audio generator to connector J19 using an SPDIF cable.

3. Connect an RF analyzer from the FM output SMA connector J1 using an SMA cable.

26 Rev. 0.4

3.2. Hardware Setup for FM or Weather Band Receiver Test

Si47xx-EVB

RF

Generator

SMA Cable

FM IN

Si47xx

Daughterboard

Si47xx

Baseboard

J28 or J26

RCA Cable

GPIO3

Audio

Analyzer

J6

RCA OUT

Jumpers

Setting

DCLK

Note: J44 and J45 are

automatically configured in

EVB Rev1.3 and later

J41

TX RX

J44 J45

USB

EXT pwr

TX RX

SW1

RCA IN

J7

Optical

Cable

J19

S/PDIF

OUT

J30

J76

Terminal

Block (TB)

J79

USB pwr

J78

EXT Jack

USB Cable

PC

w/ USB

port

Figure 22. Hardware Setup for FM/Weather Band Receiver Test

1. Connect the USB cable from PC to the EVB USB connector J79. The USB connection will serve as a dual purpose, supplying the power to the EVB and controlling the EVB.

2. Connect an audio analyzer from the RCA output connector J6 using an RCA cable.

3. Connect an RF generator to the FM input SMA connector J28 or J26 using an SMA cable.

4. Connect an audio analyzer to the S/PDIF output connector, J30, using an optical cable.

5.

To avoid possible sources of interference, please remove C9 or C12 (depending on the daughtercard). This wi ll disconnect the headphone circuit from the test circuit.

Rev. 0.4 27

Si47xx-EVB

3.3. Hardware Setup for AM Receiver Test

Audio

Analyzer

RCA Cable

RF

Generator

SMA Cable

J1

Daughterboard

F M IN

J24

Si473x

Si47xx

Baseboard

J28 or J26

RCA OUT

DCLK

GPIO3

automatically configured in

J79

USB Cable

J6

Jump ers

Se ttin g

TX RX

J44 J45

J41

Note: J44 and J45 are EVB Rev1.3 and later

USB

EXT pwr

USB pwr

TX RX

SW1

RCA IN

EXT Jack

J7

Optical

Cable

J19

S/PDIF

OUT

J30

J76

Terminal

Block (TB)

J78

PC

w/ USB

port

Figure 23. Hardware Setup for AM Reception

1. Connect the USB cable from PC to the EVB USB connector, J79. The USB connection will not only allow controlling of the EVB, but will also provide power to the EVB.

2. Connect either the ferrite antenna or the airloop antenna board. The user also has the option of using the AM test input for characterization by connecting the AM test input connector J1 to an RF generator source.

3. Connect an audio analyzer to the RCA output (connector J6) using an RCA cable for the analog audio output.

4. Connect an audio analyzer to the S/PDIF output (connector J30) using an optical cable.

5. Or, connect the headphone output to J24 on the daughtercard.

28 Rev. 0.4

Si47xx-EVB

4. Getting Started—Software Installation

The Si47xx Windows GUI (graphical user interface) software is designed for use with the Si47xx evaluation board (EVB). The GUI software revision number is available under Help

The GUI software development program uses a host machine USB port to communicate with the Si47xx EVB and is tested for use with Windows XP and Windows 2000.

To install, insert the Silicon Laboratories Si47xx 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 24.

→About.

Figure 24. Installation and Setup Screen

Important: Open and read the Readme.doc file at this point. It may contain information that is not captured here,

and which could be very important to the functionality of the EVB or software. Run the Setup.Exe and follow the instructions on the screen.

Note: If you get this Error message: "This setup requires the .NET Framework version 2.0," then you should install the .NET

Framework that is provided on the CD and re-run the setup. The GUI requires version 2.0; however, multiple versions such as 1.1, 2.0, and 3.0 can be installed simultaneously.

After installation is finished, an Si47XXGui icon will appear on your desktop. Launch the software by clicking this icon on the desktop as shown in Figure 2 5.

Figure 25. Launching the GUI

Rev. 0.4 29

Si47xx-EVB

5. FM Transmitter GUI

The first Si47xx window is the Initialization window as shown in Figure 26. Select the FM transmitter function. As an FM transmitter, there are three audio input settings available:

 Analog Input  Analog to Digital Input  Digital Input

5.1. Configuring the Si47xx as an FM Transmitter Using Analog Audio Input

This mode configures the Si47xx 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). Set jumpers J5 and J13 accordingly. Figure 26 shows the configuration setting for analog audio input. Select the device, busmode, firmware revision, and initial part settings and then click Initialize. A new window displaying "Initializing FM Transmitter" will appear.

Figure 26. Configuring the Si47xx to Transmit Analog Input

30 Rev. 0.4

Si47xx-EVB

5.2. Configuring the Si47xx as an FM Transmitter Using Digital Audio with Analog Audio

Source

This mode configures the Si47xx 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 Si47xx 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. Refer to Figure 32, “CODEC Settings Property Window,” on p age 39 to contr ol the CODEC. Select the device, busmode, firmware revision, and initial part settings and then click Initialize. A new window displaying "Initializing FM Transmitter" will appear.

Notes:

Set jumper J41 according to Figure 27 to properly operate in digital mode.

1.

2. Jumpers J44 and J45 are automatically set by the GUI with baseboard revision 1.3 and later.

Figure 27. Configuring the Si47xx to Transmit Digital Input by Using Analog Source (CODEC)

Rev. 0.4 31

Si47xx-EVB

5.3. Configuring the Si47xx as an FM Transmitter Using Digital Audio with SPDIF Digital

Source

This mode configures the Si47xx 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. Refer to Figure 33, “SPDIF Settings Property Window,” on page 40 to control the SPDIF translator.

Notes:

Set jumper J41, J44, and J45 according to Figure 28 to properly operate in digital mode.

1.

2. Jumpers J44 and J45 are automatically set by the GUI with baseboard revision 1.3 and later.

3. The Si47xx requires the digital audio signal to be present when initializing the part. Therefore, connect the SPDIF IN

signal prior to initializing the part.

Figure 28. Configuring the Si47xx to Transmit Digital Input by Using Digital Source (SPDIF)

TIP. If the Si47xx Development GUI doesn't find your device, try unplugging and plugging in the USB cable again.

32 Rev. 0.4

5.4. FM Transmitter Main Window

The FM transmitter main window will appear after initialization.

Si47xx-EVB

1 2 3

7

9

10 11 12

13 14 15 16

4

25

5

17

24

6

8

18

19 20 21 22

23

Figure 29. FM Transmitter Main Window

Table 4. FM Transmitter Main Window Descriptions

# Description Range

1

Transmit frequency display. Enter the desired FM transmit frequency in this window.

2

Transmit voltag e display. Enter the desired FM transmit voltage in this window.

3

Varactor Value. This is an indicator showing the tuning cap value of the Si472x device. Each number represents 0.25 pF. If the varactor value is manually overwritten in the property window, the indicator will change from automatic mode to manual mode.

4

RF on or off. Turning this button on will enable the FM transmit, while turning this button off will disable the FM transmit.

5

Pre-Emphasis. Click one of the three buttons to set the pre-emphasis e ither to Of f, 50 µs or 75 µs.

6

Si472x EVB audio input setting indicator: Analog In/Digital (Analog In to CODEC)/Digital (SPDIF).

7

Presets. Press and hold the desired preset button for 1.5 seconds to program. The current frequency will replace the preset number. Press for less than 1.5 seconds to tune to the displayed frequency. Presets can also be programmed automatically from the Receive Power Scan window.

8

Pilot Tone Generation. Set to 19 kHz and select "Pilot On" when in stereo mode. Set to 0–19 kHz for and select "Pilot On" for test tone generation.

9

Audio Deviation. Enter the desired audio deviation in this window.

10

Pilot Deviation. Enter the desired pilot deviation in this window.

76–108 MHz

88–120 dBuV

1–191

On/Off

Off, 50 µs, 75 µs

Analog, Digital

CODEC, Digital

SPDIF

76–108 MHz

0–19 kHz

0–90 kHz 0–90 kHz

Rev. 0.4 33

Si47xx-EVB

Table 4. FM Transmitter Main Window Descriptions (Continued)

# Description Range

11

RDS Deviation. Enter the desired RDS deviation in this window (Si4721 only).

12

Total Deviation. This is an indicator only displaying the sum of the audio, pilot and RDS deviation. If the total deviation exceeds 75 kHz, the indicator will turn red and a warning sign is displayed.

13

Input Mute Left/Right. Turning this button will mute the Left or Right audio channel.

14

Turn on or off th e pilot tone for stereo or mono FM transmit mode.

15

Turn on or off the RDS transmission (Si4721 only).

16

Modulation On. Clicking this button on will modulate the audio, pilot, and RDS signal according to the audio, pilot, and RDS deviation. Turning this button off will turn off modulation for all audio, pilot, and RDS signal and only the carrier will be transmitted.

17

Turn on or off th e L-R channel for stereo or mono FM transmit mode.

18

Turn on or off the compressor for the audio signal.

19

Attack time. Set the attack time for the compressor in milliseconds.

20

Release time. Set the release time for the compressor in milliseconds.

21

Threshold. Set the threshold for the compressor.

22

Input Gain. Set the compressor gain.

23

Limiter Release Time. Set the limiter release time constant.

24

Turn on or off the limiter feature.

25

Audio Level Indicators. Overmodulation, Limiter, Audio input level below low-level threshold (silence detection), and Audio input level below high-level threshold (loud detection). To enable these four indicators, check the Enable Interrupts box. These indicators are sticky; to clear them, click the Reset button.

0–7.5 kHz

0–187.5 kHz

On/Off On/Off On/Off On/Off

On/Off On/Off

0.5–5 ms

100–1000 ms

–40 to 0 dBFS

0 to 20 dB

0.5,1,2,3,4,5,6,7,8, 9,10,20,30,40,50,

75,100 ms

On/Off

—

34 Rev. 0.4

Si47xx-EVB

5.5. FM Transmitter Settings (Analog Mode) Property Window

FM transmitter settings are configu red by selecting Wind ows→Properties→FM Transmitter Settings when analog mode is selected in the initialization window.

Table 5. FM Transmitter Settings in Analog Mode Property Window Descriptions

Item Description Range

Reference Clock

Frequency (Hz)

Reference Clock

Prescaler

Varactor Capacitor

Overwrite

Audio Level Low

Threshold (dBFS)

Audio Level Low Duration (mSec)

Audio Level High

Threshold (dBFS)

Figure 30. FM Transmitter Settings in Analog Mode Property Window

This field is used to specify the frequency of the reference clock. The input to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

This field is used to specify the prescaler value. T he inpu t to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

This field allows the user to manually overwrite the tuning capacitance. A number 0 indicates that the tuning cap is automatically adjusted. Any number other than 0 (1 to 191) will indicate that the tuning cap is manually adjusted.

An interrupt will be generated when the audio input level falls below this threshold for the duration greater than the Audio Level Low Distortion setting. This may be called silence detection indicator.

Set the duration for the audio level low before an interrupt is generated.

An interrupt will be generated when the audio 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.

31130–34406 Hz

1–4095

Automatic: 0,

Manual: 1–191

–70 to 0

0–65535

–70 to 0

Rev. 0.4 35

Si47xx-EVB

Table 5. FM Transmitter Settings in Analog Mode Property Window Descriptions (Continued)

Item Description Range

Audio Level High

Duration (mSec)

Line Input

Attenuation

Maximum Line Input

Level

Set the duration for the audio level high before an interrupt is generated.

The Si47xx has four attenuator settings (636, 416, 301, and 190 mVp). It will tell the maximum audio input signal that the user can give to the LIN and RIN input. The attenuator setting will determine the audio input impedance (LIN and RIN) of the device.

The maximum line input level of the max audio input signal that the user supplies to the device. This number has to be less than or equal to the attenuation setting. The max line input level will correspond to the max audio deviation set in the audio deviation window on the main GUI. Make sure that the actual audio input signal does not exceed this limit, otherwise the audio signal will become distorted.

0–Line Input Attenuation

0–65535

190mVp, 301mVpk,

416mVp, 636mVpk

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Si47xx-EVB

5.6. FM Transmitter Settings (Digital Mode) Property Window

FM transmitter settings are configured by selecting Windows→Properties→FM Transmitter Settings when CODEC or SPDIF mode is selected in the initialization window.

Figure 31. FM Transmitter Settings in Digital Mode Property Window

Table 6. FM Transmitter Settings in Digital Mode Property Window Descriptions

Item Description Range

Reference Clock

Frequency (Hz)

Reference Clock

Prescaler

V aractor Capacitor

Overwrite

Audio Level Low

Threshold (dBFS)

Audio Level Low Duration (mSec)

Audio Level High

Threshold (dBFS)

Audio Level High

Duration (mSec)

This field is used to specify the frequency of the reference clock. The input to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

This field is used to specify the prescaler value. The input to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

This field allows the user to manually overwrite the tuning capacitance. 0 indicates that the tuning cap is automatically adjusted. Any number other than 0 (1 to 191) will indicate that the tuning cap is manually adjusted.

An interrupt will be generated when the audio input level falls below this threshold for the duration greater than the Audio Level Low Distortion setting. This may be called silence detection indicator.

Set the duration for the audio level low before an interrupt is generated.

An interrupt will be generated when the audio 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.

Set the duration for the audio level high before an interrupt is generated.

31130–34406 Hz

1–4095

Automatic: 0

Manual: 1–191

–70 to 0

0–65535

–70 to 0

0–65535

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Si47xx-EVB

Table 6. FM Transmitter Settings in Digital Mode Property Window Descriptions (Continued)

Item Description Range

Digital Format

Digital Sample

Precision

Digital Sample

Rate (Hz)

Digital Mono

Mode Enable

Digital DCLK

Falling Edge

2

Sets I

S of left justified digital format.

Select the precision of the digital audio input.

Sets the DFS digital sample rate. Must be set to 0 Hz befo re DCLK/ DFS is removed.

Select between Digital Stereo or Mono.

Select between using rising edge or falling edge of DCLK when sampling Digital Input (DIN) data.

Left-Justified, I DSP (MSB on first

DCLK), or DSP (MSB

on second DCLK)

8, 16, 20, 24 bits

0, 32000–48000 Hz

On/Off

2

S,

38 Rev. 0.4

Si47xx-EVB

5.7. CODEC Settings

CODEC settings are configured by selecting Windows→Properties→CODEC Settings when CODEC mode is selected in the initialization window.

Item Description Range

CODEC Precision

CODEC Output Format

CODEC Sampling Rate CODEC Channel Swap

CODEC Invert Clock

Figure 32. CODEC Settings Property Window

Table 7. CODEC Settings Property Window Descriptions

Select the CODEC digital audio output precision. Select the CODEC digital audio format between I

fied, DSP (MSB on first DCLK), or DSP (MSB on second DCLK).

Select the sample rate of the CODEC digital audio output. Select whether the CODEC digital output L-R data is normal or

swapped. Select between using rising edge or falling edge of DCLK when

sampling Digital Input (DIN) data.

2

S, Left Justi-

16, 20, 24 bits

2

Left-Justified, I

(MSB on first DCLK), or

DSP (MSB on second

DCLK)

32 or 48 kHz

On/Off

S, DSP

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Si47xx-EVB

5.8. SPDIF Settings

SPDIF settings are configured by selecting Windows →Properties→SPDIF Settings when digital SPDIF mode is selected in the initialization window.

Item Description Range

SPDIF Output Format

SPDIF Invert Clock

Figure 33. SPDIF Settings Property Window

Table 8. SPDIF Settings Property Window Descriptions

Select the SPDIF digital audio format between I Select between using rising edge or falling edge of DCLK when

sampling Digital Input (DIN) data.

2

S or Left Justified.

Left-Justified or I

On/Off

2

S

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Si47xx-EVB

5.9. FM Transmitter Receive Power Scan Window

The Receive Power Scan window enables the user to scan the entire FM band to find one or more candidate channels on which to transmit, where candidate channels are defined as those with the lowest received power. Selecting Windows and channel spacing can be selected and the number of regions can be set to return one to ten candidate channels. The number of channels to average can be set to 1, 3, 5, or 7. Selecting “To Presets“ will save the candidate channels to the GU I presets. Refer to "AN307: Si4712/13/20/21 Receive Power Scan" for additional information on the RPS feature and algorithm.

→Power Scan will launch the Receive Power Scan Window as shown in Figure 34. The band

Figure 34. Receive Power Scan Window

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Si47xx-EVB

5.10. FM Transmitter Radio Data Service (RDS)

The RDS/RBDS feature is available with the Si4711/13/21. This user guide assumes that the user is already familiar with the RDS/RBDS standard. If necessary, the user may refer to the following documents to become familiar with the RDS/RBDS standard.

 United States RBDS S tandard by National Radio Systems Committee, April 9, 1998.  RDS Universal Encoded Communication Proto c ol Version 5.1 by European Broadcasting Union, August 1997.  Silicon Labs “AN243: Using RDS/RBDS with the Si4701/03.”

In order for the user to transmit RDS, check the RDS On box. Failure to turn on RDS means that the RDS data will not be transmitted. The following picture illustrates the RDS On box that should be turned on.

Figure 35. Turning RDS On in the FM Transmitter Main Window

After the RDS transmission is enabled, click on Window screen. This window allows the user to configure RDS data to be transmitted and also allows the user to gain insight to the Si4711/13/21 RDS capability.

42 Rev. 0.4

→RDS Transmit Data to go to the RDS Transmit Data

Si47xx-EVB

Item Description

RDS/RBDS Selection

Program Type (PTY)

PTY Dynamic

PI

Program Service Messages

Load Msgs

Repeat Count

Message Count

Mix

Alternate Frequency

Artificial Head

Figure 36. RDS Transmit Window

Table 9. RDS Transmit Window Descriptions

General

Select either RDS format (Europe) or RBDS format (US). Select the available Program T ype (PTY) from the pulldown menu. Select whether the PTY will be dynamic or static. Enter Program Identification (PI) code here.

Program Service

Enter up to 12 different Program Service (PS) Messages. Each PS consists of a maximum 8 characters. Messages are ordered left to right, top to bottom.

Load the PS messages into the device. Enter how many time each PS will be repeated before sending the next PS. Enter how many messages of the loaded PS that will be transmitted. Select the mix percentage between transmitting the Program Service or Buffers. Part of RDS Group Type 0 (PS): Enter Alternate Frequency if it is available. Part of RDS Group Type 0 (PS): Enter whether Artificial Head is On or Off.

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Si47xx-EVB

Item Description

Stereo

Audio Compression

Traffic Program

Traffic Announcement

Speech

Radio Text

Radio Text: A/B Flag

Radio Text: Add to Circular

Radio Text: Add to FIFO

Manual Group Entry: B

Manual Group Entry: C

Manual Group Entry: D

Manual Group Entry: Add to

Circular

Manual Group Entry: Add to

FIFO

Circular

Circular: Size (Blocks)

Circular: Delete Group

Circular: Clear Buffer & Send

FIFO

FIFO: Size (Blocks)

FIFO: Add Time

FIFO: Delete Group

FIFO: Clear Buffer & Send

Table 9. RDS Transmit Window Descriptions

Part of RDS Group Type 0 (PS): Enter whether the transmitted audio is St ereo or Mono.

Part of RDS Group Type 0 (PS): Enter whether the Audio Compression is On or Off. Part of RDS Group Type 0 ( PS): Enter whether Traffic Program is available or not. Part of RDS Group T ype 0 (PS): Enter wh ether T raf fic Announcement is available or

not. Part of RDS Group Type 0 ( PS): Enter between Speech or Music transmission.

Buffers

Enter the RDS Group Type 2 Radio Text (RT) messages that will be loaded into either the circular or FIFO buffer.

Part of RDS Group Ty pe 2 (RT): Enter whether the A/B Flag is set or not in entering the RT. This A/B Flag will tell the receiver to clear the display when the flag toggles from one state to the other.

Add the RT messages that are entered into the GUI circular buffer queue. Add the RT messages that are entered into the GUI FIFO buffer queue. Enter manual RDS entry block B. With this window , you can transmit all RDS Grou p

Types 0 throug h 15. Enter manual RDS entry block C. With this window, yo u can transmit all RDS Group

Types 0 throug h 15. Enter manual RDS entry block D. With this window, yo u can transmit all RDS Group

Types 0 throug h 15. Add the RDS manual entry values into the GUI circular buffer queue.

Add the RDS manual values into the GUI FIFO buffer queue.

Indicator showing the GUI circular buffer queue. Indicator showing the size (in blocks) of the circula r buffer. The total size of the

buffer is 128, which is shared between the circular and FIFO buffers. To adjust the size, change the size in the FIFO buffers.

Delete the currently selected group in the GUI circular buffer queue. Clear the circular buffer on the device and send the messages in the GUI circular

buffer queue to the device. Indicator showing the GUI FIFO queue. Indicator showing the size (in blocks) of the FIFO buffer. Adjusting the size of the

FIFO will also adjust the size of the circular buffer. The total of those two buffers is 128 blocks.

This will get the current time and format it into RDS Group Type 4 Clock & Time (CT), and add it to the GUI FIFO buffer queue.

Delete currently selected group in the GUI FIFO buffer queue. Clear the FIFO buffer on the device and send the message in the GUI FIFO buffer

queue to the device.

44 Rev. 0.4

Si47xx-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 three 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.

Because of the complexity of the RDS/RBDS standard, the explanation of the RDS Transmit Data window is divided into three sections: Basic, Intermediate, and Advanced.

Rev. 0.4 45

Si47xx-EVB

5.10.1. 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: the General and Program Service. In the General category, the user can set the PI and PTY data. In the Program Service, the user can set the PS data (Group Type

0). The following diagram shows a step-by-step explanation:

1

3

2

4

5

Figure 37. Basic RDS Message Illustration

1. First select whether you want to transmit in RDS format (Europe) or RBDS format (US).

2. Type in the Program Identification in this field. Program Identification is a 16-bit code assigned to an individual station.

3. Select the Program Type in the pull down menu here. Some examples include news, information, sports, talk, rock, etc.

4. Enter the Program Service (PS) in the boxes provided. You can enter a maximum of 12 different PS messages, in which each PS message can contain a maximum of 8 characters.

a. Repeat Count: Enter how many times you want each PS message to be transmitted before sending the next PS

message. b. Message Count: Enter how many of the 12 PS messages that you actually want to transmit. c. Mix: Select 100 percent.

5. Click Send Message button here. Now the RDS will transmit the PS message along with the PI and PTY. You should see these data in your RDS receiver.

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Si47xx-EVB

5.10.2. Intermediate

In the intermediate section, we will cover the buffers category of sending the RDS data with the device, 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

4

3

5

6

Figure 38. Intermediate RDS Message Illustration

1. Select the Mix percentage that you want between transmitting the data in Program Service and the data in the Buffers. A mix percentage of 100% means that you will always transmit the PS message regardless of what is contained in the Buffers, whereas a mix percentage of 0% means that you will always transmit the data in the Buffers regardless of what is contained in the PS. If the buffers are empty, the PS messages will be transmitted all the time regardless of the mix percentage.

2. Enter the Radio Text message that will be transmitted. After entering the RT message, click either the "Add to Circular" button or the "Add to FIFO" button. The RT message will be encoded according to the RDS Group Type 2 rule.

a. Clicking "Add to Circular" button means that you add the RT message into the GUI Circular Buffer queue. Note that the

message itself has not been uploaded into the Circular Buffer inside the device until the Clear Buff & Send is clicked.

b. Clicking "Add to FIFO" means that you upload the RT message into the GUI FIFO Buffer queue. Note that the message

itself has not been uploaded into the FIFO Buffer inside the device until the Clear Buff & Send is clicked.

3. Enter the size of the FIFO that you want here. The device buffer has a total of 128 blocks, which is shared by the circular buffer and the FIFO. Therefore, the circular buffer size (shown in 3a) will be the remainder of the 128 blocks minus the FIFO size.

4. Clicking this "Clear Buff & Send" button will upload the message from the GUI Circular Buffer queue into the Circular Buffer inside the device. The Circular Buffer on the part will repeatedly send the message contained in the buffer. Note that the messages in the circular buffer will be transmitted only if the PS Mix value is set to anything other than 100%.

5. Clicking the "Add Time" button here will add the current time as a RDS Group Type 4 message to the GUI FIFO Buffer queue.

6. Clicking the "Clear Buff & Send" button will upload the message from the FIFO Buffer Indicator Window into the FIFO Buffer inside the device. The FIFO Buffer on the part will only send the messages contained in the buffer once. A good example of using FIFO buffer is when you want to send the time data. Time is something that occurs only once, so it will not be beneficial to upload time to the circular buffer and transmit it continuously. Refer to step 5 for information on sending time data. Note that the messages in the FIFO buffer will be transmitted only if the PS Mix value is set to anything other than 100%.

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Si47xx-EVB

5.10.3. Advanced

In the advanced section, we will cover the remaining RDS topics.

3

4

5

1

2

6

8

7

9

Figure 39. Advanced RDS Sending Illustration

1. Dynamic: This tells whether the PTY code is static or dynamic.

2. Alternate Frequency: This provides the ability to inform the receive r 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 = No t Artificial Head; 1 = Artificial Head b. Stereo: 0 = Mono; 1 = Stereo c. Audio Compressor: 0 = Not compressed; 1 = Compressed d. Traffic Program (TP): 0 = No TP; 1 = TP e. Traffic Announcement (TA): 0 = No TA; 1 = TA f. Speech: 0 = Speech; 1= Music

4. A/B Flag: This is an important flag in the RDS Group Type 2 (RT). Checking this box when a Radio Text is uploaded means that the RT is uploaded with the flag set. Un-checking this box when an RT is uploaded means that the flag is not set. This flag tells the receiver that when the flag toggles from set to reset or vice versa, the receiver will clear the display before showing the next RT.

5. Manual Group Entry: Use this box to upload the RDS data manually. You can use this box to upload messages from the Group Type for which the Si47xx GUI does not have encoding support. For these messages, the user must encode the messages into hexadecimal code.

6. Circular Buffer Indicator: This displays the message that gets uploaded into the Circular Buffer in hexadecimal code. This can be useful to see how the Group Type 0 (PS), Type 2 (RT), and Type 4 (CT) is encoded into RDS data.

7. Delete Circular Buffer Group: This deletes a group that is selected in the Circular Buffer Indicator.

8. FIFO Buffer Indicator: This displays the message that gets uploaded into the FIFO buffer in hexadecimal code.

9. Delete FIFO Buffer Group: This deletes a group that is selected in the FIFO Buffer Indicator.

48 Rev. 0.4

Si47xx-EVB

5.11. FM Transmitter Register Map Window

The register map window allows the user to manually program the device by sending commands to the chip. Refer to “AN332: Si47xx Programming Guide” to manually program the device. Clicking on Windows launch the Register Map Window as shown in Figure 40.

→Register Map will

Figure 40. FM Transmitter Register Ma p Window

Rev. 0.4 49

Si47xx-EVB

6. FM Receiver GUI

The first Si47xx window is the Initialization window as shown in Figure 41. Select the FM receiver function. As an FM receiver, analog audio out is available on pins 13 and 14.

6.1. Configuring the Si47xx as an FM Receiver

Select the device, busmode, firmware revision, and initial part settings and then click Initialize. A new window displaying "Initializing FM Receiver" will appear. If you check “Use XOSCEN,” the daughtercard cryst al and on-chi p oscillator will be used to clock the Si47xx. You can use the EVB Audio Settings drop down box to select the audio mode used by the Si47xx part. See Section "2.1.4. Audio I/O” for more information on this setting.

50 Rev. 0.4

Figure 41. FM Receiver Initialization

6.2. FM Receiver Main Window

The FM receiver main window will appear after initialization.

2

Si47xx-EVB

1

4

5

Figure 42. FM Receiver Main Window

6

3

Rev. 0.4 51

Si47xx-EVB

Table 10. FM Receiver Main Window Descriptions

# Name Descriptions

1 Tune/Seek

2

3 Volume, Mute

4 Auto Scan,

To Preset, Select Stn

5Presets

6 RSSI/SNR/Varactor

Tune Down (<), Tune Up (>) buttons execute a single channel step according to the channel spacing setting. The channel spacing setting can be set in the property window.

Seek down (<<), Seek Up (>>) buttons execute a seek up or down to the next received FM signal meeting or exceeding the seek settings within the selected band. The seek setting Received Signal Strength Indicator (RSSI) and Signal to Noise Ratio (SNR) threshold can be set in the property window.

The Frequency Display indicates the frequency in MHz. To change the Frequency, drag the pointer in the Frequency Slider Bar to the desired frequency. The frequency may also be changed by changing the value in the display.

AFC Rail indicator will be red if the tuned frequency is in an AFC rail state, otherwise the indicator will be grey .

The Mono/Stereo indicator will switch to stereo if the blend ratio is greater than 0 and the Pilot is present.

The Pilot indicator will be green if the received FM signal has a pilot signal. The Stereo Blend indicator will be green if the part goes into linear blend between stereo

and mono. Full mono is indicated by 0% and full stereo is indicated by 100%. The Valid indicator will be green if the FM frequency meets the RSSI and SNR seek

settings in the property window. Select the Si473x output volume (0-63) by moving the slider bar pointer. Press the Mute

button to mute the radio. If the radio is muted, the button will be red. Press the Mute button again to remove the muting.

The Auto Scan button will find all the stations with an RSSI and SNR above the seek settings in the property window. After the scan is completed, the number of stations found will be displayed and each station will be available in the drop down box. Also, a red indicator mark will be displayed on the Frequency Slider Bar (2) for each station. The "To Presets" Button will program the preset buttons (5) with the 12 strongest stations.

Press the desired button to tune to the frequency displayed on the button. To store a new value to the preset button, tune to the desired frequency and then press and hold the desired button for 1.5 seconds. The button will then change to indicate the stored frequency.

The RSSI indicator displays the RSSI of the signal in dBuV. The SNR indicator displays the SNR of the received signal in dB. The varactor indicator displays the varactor setting when using the short antenna.

52 Rev. 0.4

6.3. FM Receiver Settings Property Window

Select Window→Properties→FM Receiver Settings.

Si47xx-EVB

Figure 43. FM Receiver Settings Property Window

Rev. 0.4 53

Si47xx-EVB

Table 11. FM Receiver Settings Property Window Descriptions

Items Description Range

Antenna Type

Band

De-emphasis

Digital DCLK Falling Edge

Digital Format

Digital Mono Mode Enable

Digital Sample Precision

Digital Sample Rate Hz

Max Tune Error (kHz)

Reference Clock

Frequency (Hz)

Reference Clock Prescaler

Seek Band Lower Limit

(MHz)

Seek Band Upper Limit

(MHz)

Seek Mode

Seek RSSI Threshold (dB)

Seek SNR Threshold (dB)

Soft Mute Attenuation (dB)

Soft Mute Rate

Receive antenna selection Headphone or short antenna Frequency band US/Europe: 87.5–108 MHz

Japan: 76–90 MHz

Japan Wide: 76–108 MHz Selects de-emphasis of 50 µs or 75 µs. 50 µs, 75 µs ON uses falling edge of DCLK for sampling. Format of digital audio output. ON enables mono in digital audio output. Digital audio output bit precision. DFS sample rate for digital input signal. Recom-

mended values are: 32 kHz, 44.1 kHz, or 48 kHz. Over-sampling rate must be set in order to satisfy a minimum DCLK of 1MHz. Sample rate must be set to 0 before DCLK/DFS is removed.

Selects the maximum tuning frequency error before the AFC rail indicator is set.

This field is used to specify the frequency of the reference clock. The input to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

This field is used to specify the prescaler value. The input to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

The lower frequency limit for the seek function. This is set automatically by the GUI based on band and spacing selection.

The upper frequency limit for the seek funct ion . This is set automatically by the GUI based on band and spacing selection.

Select between stopping the seek at the band limits or wrapping at the band limits to return to the starting frequency.

The seek RSSI threshold level used for seek and scan functions.

The seek SNR threshold level used for seek and scan functions.

Maximum attenuation for soft mute. 0–31 dB,

Selects the soft mute rate. 1–255 dB

I

8-bit, 16-bit, 20-bit, 24-bit

Stop at limit or wrap at limit

ON, OFF

2

S, Left-Justified, DSP

ON, OFF

0, 32000–48000 Hz

0–255 kHz

31130–34406 Hz

1–4095 Hz

US/Europe: 87.5 MHz

Japan: 76 MHz

Japan Wide: 76 MHz

US: 107.9 MHz

(200 kHz spacing)

Europe: 108 MHz

(100 kHz spacing)

Japan: 90 MHz

Japan Wide: 108 MHz

0–255 dB

0 = disable soft mute

54 Rev. 0.4

Table 11. FM Receiver Settings Property Window Descriptions (Continued)

Items Description Range

Soft Mute SNR Threshold

(dB)

Spacing

Stereo Blend Mono

Threshold (dB)

Stereo Blend Stereo

Threshold (dB)

Varactor Capacitor

Overwrite

Si47xx-EVB

SNR threshold level used to engage soft mute. 0–15 dB

Channel spacing 50, 100, or 200 kHz RSSI threshold below which the tuner blends into

full mono. RSSI threshold above which the tuner blends into

full stereo. Manual setting of the short antenna tuning varactor. 1–191, 0 = automatically tuned

0–127 dB

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Si47xx-EVB

6.4. CODEC and SPDIF Settings

Si47xx-EVB baseboard has a Codec and an SPDIF translator for digital audio output. For tuners with digital audio option, you can set properties for the Codec and SPDIF through the GUI. These settings can be used with AM or FM tuners that have digital audio enabled.

Select Window

→Properties→CODEC and SPDIF Settings.

Figure 44. CODEC and SPDIF Settings Window

Table 12. CODEC and SPDIF Settings Windows Descriptions

Items Description Range

Codec Precision Precision of the CODEC on baseboard in bits. 16-bit, 20-bit, 24-bit

Codec Output Format Format of audio output through the Codec. I

Codec Sampling Rate Sampling rate for the Codec in kHz. 32 kHz, 48 kHz

Codec Channel Swap Determines if channels need to be swapped on the

Codec.

Codec Invert Clock ON inverts the digital clock. ON, OFF

SPDIF Output Format Format of audio output through the SPDIF. I

SPDIF Invert Clock ON inverts the digital clock. ON, OFF

2

S, Left-Justified, DSP(MSB

st

on 1

DCLK), DSP(MSB on

2nd DCLK)

ON, OFF

2

S, Left-Justified

56 Rev. 0.4

Si47xx-EVB

6.5. FM Receiver RDS Window

The FM receive RDS window allows the user to view program service, program type, PI code, radio text, clock, group error rate, sync time and display times, an alternate frequency list, and group statistics. Select Window

→RDS Receive Data.

Figure 45. FM Receiver Settings RDS Window

Rev. 0.4 57

Si47xx-EVB

Table 13. FM Receiver Settings RDS Window Descriptions

# Items Description

1 Radio Data Service

2 Sync Times 3RDS

Synchronization

Indicator

4 Alternate

Frequency

Indicator

5 Group Counters

6 Block Counters

7Reset

PS: Program Service Indicator (8 characters). RT: Radio Text Indicator (64 characters). CT: Clock Indicator showing time, day, and date. Group Error Rate indicates the percentage of uncorrectable groups received. PTY: Program Type Indicator PI: PI Code Indicator Time required to synchronize, display radio text, and display program service. Indicates that RDS is synchronized.

When present, shows a list of alternate frequencies. Alternate fr equency methods A and B are supported.

Provides the total number and percent age breakdown of group types 0–15, A/B. To view this information, select Window

Provides the block error rates after tune and after RDS Sync. After Tune Error Rate: After tune (STC interrupt), the ideal number of blocks the FM tuner should have received is calculated. Also, the number of accepted blocks and errors are calculated. Error Rate = number of errors / number of ideal blocks after tune. After Sync Error Rate: After RDS Sync (RDS interrupt), the ideal number of blocks the FM tuner should have received is calculated. Also, the number of accepted blocks and errors are calculated. Error Rate = number of errors / number of ideal blocks after sync Because it usually takes 100~200ms for the FM tuner to synchronize to RDS data (STC interrupt always comes before RDS interrupt), "After Tune Error Rate" will always be greater than "After Sync Error Rate." After a long time, both error rates should consolidate at similar levels.

Resets the block counter numbers.

→RDS Group Counters. Please refer to Figure 46.

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Si47xx-EVB

Figure 46. RDS Group Counters Window

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Si47xx-EVB

6.6. FM Receiver RDS Settings

RDS settings are configured by selecting Windows→Properties→FM Receiver RDS Settings.

Figure 47. FM Receiver RDS Settings Window

60 Rev. 0.4

Table 14. FM Receiver RDS Settings Window Descriptions

Item Description Range

RDS State Enables and disables RDS. On, Off

Si47xx-EVB

RDS (RT and PS) Error Checking Selects GUI error checking level.

Minimum displays text as received. Mid-range requires two duplicate buffers before displaying text. Maximum requires two duplicate buffers and also ignores the A/B flag.

RDS Program Type Decode Selects RDS or RBDS program type

decoding.

RDS Text Decoding* Selects text decoding mode. ASCII, Big 5 (Traditional Chinese),

RDS Group Filter Mode Selects group filter mode. Simple

mode displays a group as long as all blocks are correctable. Verbose (Group B Uncorrected) mode displays a group even if one or more blocks is uncorrectable. Verbose (Group B Corrected) displays a group as long as block B is correctable, even if blocks A, C, or D are uncorrectable. Strict mode displays a group only if there are no errors in any block.

Minimum, Mid-Range, Maximum

RDS, RBDS

Default (Use system code page), UTF-8, Unicode

Simple, V erbose (Group B Corrected Only), Verbose (Group B Uncorrected), Strict

RDS Block A Error Level Sets the Block A error level above

which the entire RDS group will be discarded.

RDS Block B Error Level Sets the Block B error level above

which the entire RDS group will be discarded.

RDS Block C Error Level Sets the Block C error level above

which the entire RDS group will be discarded.

RDS Block D Error Level Sets the Block D error level above

which the entire RDS group will be discarded.

*Note: The RDS character libraries are documented in Annex E of CENELEC EN 50067: 1998.

No Block Errors 1 to 2 errors corrected 3 to 5 errors corrected Uncorrectable

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Si47xx-EVB

6.7. FM UI Settings

Figure 48. FM UI Settings Property Window

Table 15. FM UI Settings Property Window Descriptions

Hems Description Range

Update Rate (sec) The time span when the UI gets status information

from the part.

Scan Time 1 (sec) In log band scan, the time between seeking and

retrieving data from the UI.

Scan Time 2 (sec) In log band scan, the time it takes the RDS data to

populate, if RDS is available.

Note: UI settings window is common to all EVBs.

0.2–4.0 seconds

1–10 seconds

62 Rev. 0.4

Si47xx-EVB

6.8. FM Receiver RSSI/SNR Graph Window

The RSSI/SNR Graph Window allows the user to plot RSSI and SNR across the FM band. Bitmap data can be saved to file by selecting File .csv.

→Save as Bitmap and tabulated data can be saved to file by selecting File→Save to

Figure 49. FM Receiver RSSI/SNR Graph Window

Table 16. FM Receiver RSSI/SNR Graph Window Descriptions

# Items Description

1 RSSI/SNR Graph 2Line / Bar

3Draw 4 Seek Threshold

(RSSI/SNR)

5 Valid Stations

6 Clear

Select between drawing the RSSI, SNR graph, or both. Select between drawing in bar mode (depicted as green) or in continuous

line mode (depicted as yellow). Click this to start plotting the graph. Draw the RSSI and/or SNR seek threshold as specified in the respective

properties. The RSSI seek threshold is shown in red, the SNR se ek threshold is shown in orange.

Mark valid stations based on the RSSI/SNR seek threshold settings. Valid frequencies can also be marked.

Click this button to clear the entire graph.

Rev. 0.4 63

Si47xx-EVB

6.9. FM Receiver Register Map Window

The register map window allows the user to manually program the device by sending commands to the device. Refer to "AN332: Si47xx Programming Guide" to manually program the device.

Figure 50. FM Receiver Register Map Window

64 Rev. 0.4

Si47xx-EVB

7. Weather Band GUI

The first Si47xx window is the Initialization window as shown in Figure 51. Select the Weather Band function. For weather band, analog audio out is available on pins 13 and 14.

7.1. Configuring the Si4736/37/38/39 as Weather Band Receiver

Select the device, busmode, firmware revision, and initial part settings and then click Initialize. A new window displaying "Initializing Weather Band" will appear.

Figure 51. Weather Band Initialization

Rev. 0.4 65

Si47xx-EVB

7.2. Weather Band Main Window

The weather band main window will appear after initialization.

Figure 52. Weather Band Main Window

Table 17. Weather Band Main Window Descriptions

# Name Descriptions

1 RSSI/SNR/

AFC

2Presets 3 Volume, Mute

4 Measure

Channels

5Alert Tone

Present

The RSSI indicator displays the RSSI of the signal in dBuV. The SNR indicator displays the SNR of the received signal in dB. The AFC indicator displays whether AFC is railed or not. The red light on this indicator means AFC is railed.

Press the desired button to tune to the frequency displayed on the button. Select the Si473x output volume (0–63) by moving the slider bar pointer. Press the Mute

button to mute the radio. If the radio is muted, the button will be red. Press the Mute button again to remove the muting.

Press this button to measure RSSI and SNR on all preset channels.

When lit, shows the presence of the alert tone.

66 Rev. 0.4

7.3. Weather Band Settings Property Window

Select Window→Properties→WB Receiver Settings.

Si47xx-EVB

Figure 53. Weather Band Receiver Settings Property Window

Table 18. Weather Band Receiver Settings Property Window Descriptions

Items Description Range

Reference Clock Frequency (Hz)

Reference Clock Prescaler

This field is used to specify the frequency of the reference clock. The input to the RCLK pin divided by the prescaler is the reference clock. The reference clock must be in the range of 31130 to 34406 Hz.

This field is used to specify the prescaler value. The input to the RCLK pin divided by the prescaler is the refere nce clock. The reference clock must be in the range of 31130 to 34406 Hz.

31130–34406 Hz

1–4095 Hz

Rev. 0.4 67

Si47xx-EVB

7.4. Weather Band Receiver RSSI/SNR Graph Window

The RSSI/SNR Graph Window allows the user to plot RSSI and SNR across the weather band. Bitmap data can be saved to file by selecting File .csv.

→Save as Bitmap and tabulated data can be saved to file by selecting File→Save to

Figure 54. Weather Band Receiver RSSI/SNR Graph Window

Table 19. Weather Band Receiver RSSI/SNR Graph Window Descriptions

# Items Description

1 RSSI/SNR Graph 2 Line/Bar

3Draw 4 Clear

Select between drawing the RSSI, SNR graph, or both. Select between drawing in bar mode (depicted as green) or in continuous line

mode (depicted as yellow). Click this to start plotting the graph. Click this button to clear the entire graph.

68 Rev. 0.4

Si47xx-EVB

7.5. Weather Band Receiver Register Map Window

The register map window allows the user to manually program the device by sending commands to the device. Refer to "AN332: Si47xx Programming Guide" to manually program the device.

Figure 55. Weather Band Receiver Register Map Window

Rev. 0.4 69

Si47xx-EVB

8. AM Receiver GUI

8.1. AM Receiver Initialization

The first Si473x window is the Initialization window as shown in Figure 56. On the function drop-down menu, select the function of the Si473x as an AM Receiver. Select the device, busmode, firmware revision, and initial part settings and then click Initialize. A new window displaying "Initializing AM Receiver" will appear. If you check “Use XOSCEN,” daughtercard crystal and on-chip oscillator will be used to clock the Si473x. You can also select Analog Output or Digital Output through SPDIF and CODEC with the EVB Audio Settings drop down box. The AM receiver mode is used for SW and LW reception as well.

Figure 56. AM Receiver Initialization

70 Rev. 0.4

8.2. AM Receiver Main Window

The AM receiver main window will appear after initialization.

Figure 57. AM Receiver Window

Table 20. AM Receiver Window Descriptions

# Name Description

1 Tune/Seek

2 Frequency

Slider

Bar, AFC,

Valid, Band

Selection

3 Volume,

Mute

4 Auto Scan,

To Preset, Select Stn

5Presets

6 RSSI, SNR,

Varactor

Tune Down (<), Tune Up (>) buttons execute a single channel step according to the channel spacing setting. The channel spacing setting can be set in the property window. Seek down (<<), Seek Up (>>) buttons execute a seek up or down to the next received FM signal meeting or exceeding the seek settings within the selected band. The seek setting RSSI and SNR threshold can be set in the property window.

The Frequency Display indicates the frequency in kHz. To change the Frequency, drag the pointer in the Frequency Slider Bar to the desired frequency. AFC Rail indicator will be red if the tuned frequency is in an AFC rail state, otherwise the indicator will be grey . The Valid indicator will be green if the AM frequency meets the RSSI and SNR seek settings. Using the drop down box, you can select different AM, LW, or SW bands. If an SW band is selected using the SW/WB Antenna Card, set the varactor to 1 for best performance. LW not supported with SW/WB Antenna Card.

Select the Si473x output volume (0–63) by moving the slider bar pointer. Press the Mute button to mute the radio. If the radio is muted the button will be red. Press the Mute button again to remove the muting.

The Auto Scan button will find all the stations with an RSSI and SNR above the seek settings in the property window. After the scan is completed, the number of stations found will be displayed and each station will be available in the drop down box. Also, a red indicator mark will be displayed on the Frequency Slider Bar (2) for each station. The "To Presets" Button will program the preset buttons (5) with the 12 strongest stations.

Press the desired button to tune to the frequency displayed on the button. To store a new value to the preset button, tune to the desired frequency and then press and hold the desired button for 1.5 seconds. The button will then change to indicate the stored frequency. This information is stored to a file and used the next time the program is run.

The RSSI indicator displays the RSSI of the signal in dBuV. The SNR indicator displays the SNR of the received signal in dB. The varactor value specifies th e capacit ance of the tuning fron t-end. A value of 6143 means that the maximum capacitance is being presented at the AM input and a value of 1 means that the varactor is at its minimum value.

Si47xx-EVB

Rev. 0.4 71

Si47xx-EVB

8.3. AM Receiver Property Settings Window

Figure 58. AM Receiver Settings Property Window

72 Rev. 0.4

Si47xx-EVB

Table 21. AM Receiver Property Window Descriptions

Name Description Range

Channel Filter

De-emphasis

Digital DCLK

Falling Edge

Digital Format

Digital Mono

Mode Enable

Digital Sample

Precision

Digital Sample

Rate Hz

Front-end Cap

Offset

Front-End

Inductance (H)

Reference Clock

Frequency (Hz)

Reference Clock

Prescaler

Seek Band Lower

Limit (kHz)

Seek Band Upper

Limit (kHz)

Seek Mode

Seek RSSI

Threshold (dBµV)

Seek SNR

Threshold (dB)

Soft Mute Attenu-

ation Slope

(dB/dB)

Soft Mute Max

Attenuation (dB)

Channel Filter allows the user to select the bandwidth of the bandpass channel filter.

De-emphasis filter setting allows the user to select whether to turn on/ off the de-emphasis filter.

ON uses falling edge of DCLK for sampling.

Format of digital audio output. ON enables mono in digital audio output.

Digital audio output bit precision.

DFS sample rate for digital input signal. Recommended values are: 32 kHz, 44.1 kHz, or 48 kHz. Over-sampling rate must be set in order to satisfy a minimum DCLK of 1MHz. Sample rate must be set to 0 before DCLK/DFS is removed.

The stray capacitance of the antenna circuit.

Stray Cap

Cap Offset

-----------------------

=

95fF

The inductance value used to calculate the ideal varactor setting. When set to 0, automatic tuning is used.

This field is used to specify the frequency of the reference clock. The Reference clock frequency divided by the pre-scalar must be in the range of 31.130 to 34.406 kHz.

Reference Clock Pre-scalar divides down RefCLK frequency by the value specified in this field. The Reference clock frequency divided by the pre-scalar must be in the range of 31.130 to 34.406 kHz.

The lower frequency limit for the seek function. This is set automatically by the GUI based on spacing selection.

The upper frequency limit for the seek function.

Seek mode specifies the behavior of seek when it reaches either end of the AM band. The default value makes the seek wrap around and start at the other end of the AM band. The other option makes seek stop if it reaches either end of the AM band without finding an AM station.

Seek RSSI threshold is a metric that is used when using the seek feature. Any signal with an RSSI lower than the threshold will be ignored during a seek.

Seek SNR threshold is a metric that is used when using the seek feature. Any signal with an SNR lower than the threshold will be ignored during a seek.

Soft mute attenuation slope specifies the slope of the attenuation cu rve when the signal SNR is below the soft mute SNR threshold. It is specified as dB/dB where the attenuation applied is simply the value specified here times the amount the signal SNR is below the threshold.

Soft mute attenuation is the amount of attenuation that takes place when the signal falls below the soft mute threshold.

2

I

8-bit, 16-bit, 20-bit, 24-bit

10 kHz Spacing: 520 kHz

9 kHz Spacing: 510 kHz

Stop at Limit or Wrap at

1, 2, 3, 4, 6 kHz

On/Off

ON, OFF

S, Left-Justified, DSP

ON, OFF

0, 32000–48000 Hz

73–6143

1 nH–2.55 Hz

31130–34406 Hz

1–4095

1710 kHz

Limit

0–63 dBµV

0–63 dB

1–5

0–63 dB

0=disable

Rev. 0.4 73

Si47xx-EVB

Table 21. AM Receiver Property Window Descriptions (Continued)

Name Description Range

Soft Mute Rate

(dB/s)

Soft Mute SNR Threshold (dB)

Spacing

Varactor Capacitor Overwrite

Soft mute rate specifies how quickly to mute the output when the signal level falls below the threshold specified for soft mute or how quickly to come out of soft mute when the level is above the threshold.

Soft mute SNR threshold is the level below which soft mute is activated.

Allows specification of the step spacing when tuning with the GUI. Varactor capacitance overwrite allows the specification of the capaci-

tance presented to the AMI pin from the tunable capacitor inside the part. A value of 0 automatically selects the value. If an SW band is selected using the SW/WB Antenna Card, set the varactor to 1 for best performance. LW not supported with SW/WB Antenna Card.

0–1109.5 dB in units of

4.35 dB

0–63 dB

9 or 10 kHz

Automatic: 0

Manual: 1–6143

74 Rev. 0.4

Si47xx-EVB

8.4. AM Receiver RSSI/SNR Graph Window

The RSSI/SNR graph window allows the user to plot RSSI and SNR across the AM band. Bitmap data can be saved to file by selecting File .csv.

→Save as Bitmap and tabulated data can be saved to file by selecting File→Save to

Figure 59. AM Receiver RSSI/SNR Graph Window

Table 22. FM Receive RSSI/SNR Graph Window Descriptions

# Items Description

1 RSSI / SNR Graph 2Line / Bar

3Draw 4 Seek Threshold

(RSSI / SNR)

5 Mark Valid Stations 6 Clear

Select between drawing the RSSI or SNR graph. Select between drawing in bar mode (depicted as green) or in continuous

line mode (depicted as yellow). Click this to start plotting the graph Draw the RSSI and/or SNR seek threshold as specified in the respective

properties. The RSSI seek threshold is shown in red; the SNR se ek th re sh old is shown in orange.

Mark Valid Stations based on the RSSI/SNR seek threshold settings. Click this button to clear the entire graph.

Rev. 0.4 75

Si47xx-EVB

8.5. AM Receiver Register Map Window

The register map window allows the user to manually program the device by sending commands to the device. Refer to "AN332: Si47xx Programming Guide" to manually program the device.

Figure 60. Register Map Window

76 Rev. 0.4

Si47xx-EVB

9. Using the EVB with a 9 V Battery

The EVB can be used with a 9 V battery that allows the user to disconnect the board from the computer for evaluating the Si47xx. Follow the guidelines listed below to use your EVB with a 9 V battery.

1. Put the switch SW1 in the Ext/Battery position.

2. Connect a 9 V battery to jumper J77.

3. Connect the USB cable.

4. Launch the GUI.

5. Initialize the EVB for AM or FM reception.

6. Once the desired station is tuned and all the settings for the receiver are according to the user's liking, please exit the GUI.

7. When asked whether to leave the device on, please click on yes.

8. Remove the USB cable.

9. The EVB can now be moved around.

Please note that once the EVB is using its 9 V battery, it is not possible to change the tuned station. Repeat steps 3–9 to tune the EVB to a different station while running on the 9 V battery .

Rev. 0.4 77

Si47xx-EVB

10. Debugging Guidelines for Si47xx EVB

Table 23. Debugging Guidelines for Si47xx EVB

Mode Symptom Solution

Configuration EVB not recognized

Initialization GUI crashes

Receive Audio clicking noise

Receive Excess interference/

Poor Reception

Receive Seek/scan doesn’t find

expected channels

Receive Seek/scan stops on

noise

FM/WB

Receive

Poor sensitivity from

FM test port

AM Receive Excess interference/

Poor reception

FM Transmit Audio distorted/Limiter

engaging excessively

 If the EVB is not recognized by the PC, remove the USB connection and

reconnect. Ensure the EVB is recognized by the PC by right-clicking on My Computer and selecting Properties→Hardware→Device Manager. Under Human Interface Devices, select each HID-Compliant Device→“Details entry and confirm one contains VID_10C4&PID_8244.

 IF the EVB is not recognized by the GUI, but is recognized by the PC, it

is likely that another process has erroneously acquired th e handle to the EVB. Two processes known to cause this issue are lxhidsve.exe and EAUSBKBD.exe. Terminate these processes in the Task Manager.

 If EVB is not recognized by the GUI, uninstall .NET framework 2.0 and

reinstall from the installation CD or Microsoft’s website. The GUI requires .NET Framework 2.0; however, multiple versions such as 1.1,

2.0, and 3.0 may be installed simultaneously.

 The GUI may crash if a previous GUI .ini file was not removed properly.

Close the GUI, and delete all .ini files from the GUI directory. Launch the GUI and try again.

 If the GUI continues to crash, close the GUI, remove the GUI from

Control Panel→Add or Remove Programs, and then delete the GUI directory. Launch the GUI and try again.

 Disable "Update" under the "Control" menu (disables continuous GUI/

Si47xx updates).

 If using a laptop, ensure it is running off the battery and not plugged in to

the ac mains.

 Alternatively, disconnect from the host PC and run from battery power.  Move to a stronger signal environment.

 Adjust Seek SNR and Seek RSSI thresholds downwards.  Verify band and channel spacing for the region.

 Adjust Seek SNR and Seek RSSI thresholds upwards.  If using a laptop, ensure it is running off the battery and not plugged in to

the ac mains.

 Remove ac coupling cap from the headphone input path to eliminate

possible sources of interference.

1. Check the antenna board connection on J2.

2. Make sure the ferrite bar is not loose and does not slide in the coil.

3. If using a laptop, ensure it is running off the battery and not plugged in.

4. Alternatively, disconnect from the host PC and run from battery power.

5. Move to a stronger signal environment. Make sure you are close to a window or outside in the open when evaluating AM reception. Large metal structures, like buildings, interfere with AM reception so it is best to be away from these sources of interference.

 Confirm that audio input levels match the Line Input Attenuation and

Maximum Line Input Levels.

 Disable or scale back the gain of the audio dynamic range control.

78 Rev. 0.4

Table 23. Debugging Guidelines for Si47xx EVB

Si47xx-EVB

FM Transmit Poor transmit audio

quality

 Increase the RF level.  Increase the audio deviation level.  Change the RF frequency to a channel with less interference.

The RPS feature can be used to find candidate frequencies.

Rev. 0.4 79

Si47xx-EVB

11. Bill of Materials

Table 24. Si47xx-EVB Baseboard Rev 1.4—Bill of Materials

Item Qty REFDES Description Value Mfg/Vendor Mfg/Vendor_PN

1 1 J78 2.1mm power plug CUI CONN_PJ-01 2 27 C1,C2,C4,C11,C13,C28,C31,C33,

C34,C35,C36,C39,C40,C42,C43, C46,C50,C52,C54,C55,C57,C61,

C62,C68,C71,C73,C74 3 1 C 7 2 RADIAL CAP 4.7UF Kemet T350B475K016AS 4 1 C 7 0 CAP,SM,0805 0.1UF 5 1 C 6 0 CAP,SM,7343,15UF,10% 15UF VISHAY 293D156X9020D2T 6 6 C18,C21,C22,C38,C69, C77 CAP ,SM,0603,1UF,X7R 1UF VENKEL C0603X7R100-

7 2 C 2 0 , C 4 1 CAP,SM,0402 24pf MURATA GRM1555C1H240JZ01

8 5 C23,C26,C27,C30,C53 CAP,SM,0402,.01UF,10%,25V 0.01uF Kemet C0402C103K3RACTU 9 1 C 5 9 CAP,SM,0402,22PF,10% 22Pf PANASONIC-

10 8 C32,C37,C45,C47,C48,C49,C51,

C 6 5

11 12 CAP,SM,0805 10UF MURATA GRM21BR71A106KE5

12 3 C25,C3, C75 CAP,SM,0402,220PF,5% 220PF PA NA SON IC -

13 1 C 5 8 CAP,SM,3216,10V,10%,6.8UF 6.8UF EPCOS INC B45196H2685K109 14 1 C 5 6 CAP,SM,0805,25V,10%,4.7UF 4.7UF MURATA GRM21BR61E475KA1

15 2 C12,C76 CAP,SM,0402,820PF,5% 820pF MURATA GRM1555C1E821JA01 16 1 D1 LED,T-1 3/4.RED DIFFUSED LITEON LTL-10223W 17 2 F B 1 , F B 2 FERRITE BEAD,SM STEWARD MI0805K400R-00 18 2 C100, C101 RES,SM,0805 0ohm VENKEL CR0805-16W-000T 19 3 J2,J17,J21 Solder jumpers 20 1 J77 CONN,TH,1X2,HDR SAMTEC TSW-102-07-G-S 21 5 J5,J13,J41,J61,J65 CONN,TH,1X3,HDR SAMTEC TSW-103-07-G-S 22 1 J 6 2 CONN,TH,2X10,HDR SAMTEC TSW-110-07-G-D 23 1 J 7 6 PCB TERMINAL BLOCK, 4

24 2 J 2 7 , J 7 5 CONN,TH,TFM,HDR,2X20,0.0

25 2 J 2 4 , J 5 4 SMA_VERTICAL Digikey ARFX1231-ND 26 2 J 3 2 , J 5 1 CONN,TH,1X8,HDR SAMTEC TSW-108-07-G-S 27 2 J68, J69 CONN,TH,1X3,HDR \

28 2 J 6 , J 7 CONN,RCA,RIGHT ANGLE CUI RCJ-2123 29 1 J 3 0 MINIJACK,3.3V,8MBPS SHARP GP1FD310TP 30 1 J 1 9 MINIJACK,RCVR,3.3V,8MBPS SHARP GP1FD210RP 31 1 J 7 4 HEADER,SHROUDED,5X2 3M 2510-6002UB 32 1 J 7 9 CONN,TH,USB,RCPT,TYPE B 67068-0000 MOLEX/WALDOM

33 1 PB1 BUTTON,SM,LIGHT-

CAP,SM,0402,0.1UF,10% 0.1UF VENKEL C0402X7R160-

104KNE

105KNE

D

ECJ-0EC1H220J

ECG

CAP,SM,3216,16V 10UF VISHAY 293D106X9016A2

1L

ECJ-0EC1H221J

ECG

2L

POSITION

5X0.05IN PITCH

CONN,TH,1X1,HDR

TOUCH,160GF,6X3.5MM

MOUSER

ELECTRONICS

SAMTEC TFM-120-02-S-D-A

SAMTEC TSW-103-07-G-S \

PANASONIC -

ECG

651-1803293

TSW-101-07-G-S

ELECTRO

EVQ-PPBA25

80 Rev. 0.4

Si47xx-EVB

Table 24. Si47xx-EVB Baseboard Rev 1.4—Bill of Materials (Continued)

Item Qty REFDES Description Value Mfg/Vendor Mfg/Vendor_PN

34 28 R8,R9,R20,R48,R49,R50,R51,R52,

R53,R54,R55,R56,R57,R58,R59, R60,R62,R63,R68,R69,R71,R72,

R 7 5 , R 7 7 , R 7 9 , R 8 1 , R 8 2 , R 9 1 35 1 R 8 0 RES,SM,0402 22.1 VENKEL CR0402-16W-22R1FT 36 5 R5,R7,R10,R11,R29 RES,SM,0402 10K KOA SPEER RK73H1ELTP1002F 37 2 R 1 2 , R 1 3 RES,SM,0402 5.6K KOA SPEER RK73H1ELTP5601F 38 1 R 4 3 RES,SM,0402 33 VENKEL CR0402-16W-330GT 39 4 R17,R27,R36,R19 RES,SM,0402 47K YAGEO

40 1 R 3 1 RES,SM,0402,300,1%,1/16W 301 YAGEO

41 1 R 3 8 RES,SM,0402,100,1%,1/16W 100 YAGEO

42 8 R1,R2,R4,R6,R15,R16,R18,R23 RES,SM,0402,160K,5% 160K VENKEL CR0402-16W-164JT 43 2 R26,R90 RES,SM,0402,7.32K,1% 7.32K VENKEL CR0402-16W-7321FT 44 2 R34,R89 RES,SM,0402,12.7K,1% 12.7K VENKEL CR0402-16W-1272FT 45 2 R22,R14 RES,SM,0402,7.68K,1% 7.68K VENKEL CR0402-16W-7681FT 46 1 R 8 5 RES,SM,0402 1K VENKEL CR0402-16W-102J 47 4 R61,R70,R76,R83 RES,SM,0402 2K VENKEL CR0402-16W-202J 48 1 R 4 7 RES,SM,0805 470 VENKEL CR0805-8W-471J 49 1 R 4 6 RES,SM,0402,1% 51.1K ROHM MCR01MZPF5112 50 1 R 4 5 RES,SM,0402,1% 140K PANASONIC-

51 1 R 4 4 RES,SM,0402 330K ROHM MCR01MZPJ334 52 2 R 2 1 , R 2 8 RES,SM,0402 124K ROHM MCR01MZPF1243 53 2 R 2 5 , R 3 3 RES,SM,0402 39.2K ROHM MCR01MZPF3922 54 1 R 8 4 RES,SM,0603 1K VENKEL CR0603-10W-1001FT 55 1 R 8 6 VARISTOR,SM,O603 LITTLEFUSE INC V5.5MLA0603H 56 2 R 8 7 , R 8 8 VARISTOR,SM,O402 LITTLEFUSE INC V0402MHS03 57 1 R 2 4 RES,SM,0402,680,1%,1/16W 681 ROHM MCR01MZPF6810 58 1 SW1 SWITCH_3PIN e-switch eg2472 59 7 U1,U3,U8,U11,U13,U18,U21 SPDT_SWITCH,SC70-6 FAIRCHILD NC7SB3157P6X 60 1 U 1 7 VOLTAGE_REG,3_3

61 1 U 1 4 OCTAL_BUFFER,TSSOP-20 ST 74LCX541TTR 62 2 U 7 , U 1 2 , IC,SINGLE_SCHMITT_TRIGG

63 3 U2 , U 4 , U 5 IC,S M , O PAMP, S O T 23-8 MAXIM MAX4233AUB 64 1 U 1 6 VOLTAGE_REG,ADJV

65 1 U 1 0 IC,SM,WM8731,WOLF-

66 1 U 6 IC,SM,UHS DUAL SPST,8

67 1 U 2 2 IC,SM,C8051F342,MCU,LQFP

68 1 U 9 IC,SM,CS8427-

69 1 X1 32_768KHZ,OSCILLATOR,SM ECS_INC ECS-327SMO

RES,SM,0402 0R VENKEL CR0402-16W-000T

V,500MA,SOT223

ER_BUFFER

V,200MA

SON,QFN-28

LEAD US8

-32,9X9MM

DS,SPDIF_TRANSLATOR,28-

TSSO

RC0402FR-0747KL

CORPORATION

9C04021A3010FLHF3

CORPORATION

RC0402FR-07100RL

CORPORATION

ERJ-2RKF1403X

ECG

NATIONAL

SEMICONDUCT

TEXAS_INSTRU

MENTS

NATIONAL

SEMICONDUCT

WOLFS ON WM8731

FAIRCHILD SEMI-

CONDUC

SILICON

LABORATORIES

CIRRUS CS8427-CZ

LM2937IMP-3.3

SN74LVC1G17DBVR

LP2986-5.0

FSA266K8X

C8051F342GQ

Rev. 0.4 81

Si47xx-EVB

Table 24. Si47xx-EVB Baseboard Rev 1.4—Bill of Materials (Continued)

Item Qty REFDES Description Value Mfg/Vendor Mfg/Vendor_PN

70 1 X2 XTAL,12.288MHZ,18PF CITIZEN AMER-

ICA CORP

71 12 R30,R32,R35,R37,R39,R40,R41,

R42,R92,R93,R94,R95

72 1 J 7 6 4P Plug 180Deg terminal block MOUSER

73 2 U23, U26 Diode,SM,SD103AW,Shottkey

74 2 Screw Pan 440x3/4 MOUSER

75 2 Spacer nyln rnd 4x. 25 MOUSER

76 3 Screw Pan 440x3/8 MOUSER

77 5 1/4 Tapped spacer MOUSER

78 2 Steel nut, Size 2-56 Width

79 2 Steel Screw Head Diameter

0.162', Length 0.25', Size 2-56

80 4 Nylon Washer, Diameter

81 1 Battery Holder 9V MOUSER

82 1 "I" 6" 26AWG W/SKT 9V Snap MOUSER

Res,sm,0402 49.9 Venkel CR0402-16W-49R9FT

ELECTRONICS

Diodes SD103AW-7

diode

ELECTRONICS

Newark 18M5986

0.187' New-

ark

0.187', Size #2

18M6002

Newark 94F9852

ELECTRONICS

CS10-12.288MABJ-UT

651-1803594

561-P440.75

561-K4.25

561-P440.375

561-TSP3

1BH080

121-0626/M-GR

82 Rev. 0.4

Si47xx-EVB

m

Table 25. Si471x/2x-EVB Daughtercard (Rev 1.4)—Bill of Materials

ITEM QTY REFDES DESCRIPTIO N VALUE MF G/Vendor MFG/Vendor_PN

1 2 C4,C6 CAP,SM,0402,X7R 22PF MURATA GRM185R71E220KA61D 2 1 C2 CAP,SM,0402,X7R 22NF MURATA GRM185R71E223KA61D 3 2 C7,C10 CAP,SM,0402,X7R 0.1UF MURATA GRM185R71C104KA88D 4 2 C3,C5 CAP ,SM,0603,X7R 0.47UF VE NKEL C0603X7R160-474KNE 5 2 C1,C9 CAP,SM,0603,X7R 1NF MURATA GRM185R71E102KA61D 6 3 C11,C12,C13 CAP,SM,0402,X7R 100pF MURATA GRM1555C1H101JZ01D 7 2 C14,C15 C AP ,SM,0603,X7R 0.33UF VE N K EL C 0603X7R 160-334KN E 8 1 C8 R ES,SM ,0603 2pF AVX 06 035J 2R0ABTTR

SMA,EDGE -MOUN T,

92J1,J28

10 1 J25 CONN, SM, 2X20, SFM SAM TEC SFM-120-02-S-D-A

11 3 J4,J5,J6 12 1 J11 HEADER, 3X12 NP SAM TEC T SW-112-07-G-T

J3,J9,J10 ,J12,J 13,J1 4,

J15,J16,J17,J18,J19,J20, 13 16 14 2 J7,J8 CONN, TH, 1X3, HDR NP SAMTEC TSW-103-07-G-S 15 1 J2 CONN, TH, 1X2, HDR NP SAMTEC TSW-102-07-G-S

16 1 J29 17 3 F1,F2,F3 Ferrite Bead,SM,0603 2500oh 18 1 19 1 L5 IN, SM, 0603 270NH MURATA LQ W18ANR27J00D 20 1 L1 IN, SM, 0603 0R VENKE L CR 0603-16W -000T 21 1 L3 IN, SM, 0603 220nh MURATA LQ W18ANR22J00D 22 1 R2 R ES, SM, 0603 0R VENKE L CR 060 3-16W-000T 23 1 R4 R ES, SM, 0603 49.9R VENKEL CR0603-16W-49r9T 24 1 R10 RES, SM, 0402 10k VENKE L CR 0 402-16W -103JT 25 1 R1 R ES, SM, 0603 10K VENKE L CR 0 603-16W -103JT 26 4 R3,R7,R8 ,R9 RES, SM, 0402 20K VENKEL CR0402-16W-203JB 27 3 R5,R6,R13 RES, SM, 0402 2K VENKE L C R0402-16W-202JB 28 2 R11,R12 RES, SM, 0402 604 VENKEL C R0402-16W-604R0JB 29 1 U1 IC, SM, S I4720,MLP20 3X3 SILAB SI4720

30 1 U2 IC,SM,HEADPHONE AMP

31 1 U4 32 1 X1 (See note below ) XTAL, SM, 32.768 E pson FC -135 33 1 A1 4710 RF Daughter Card PCB

: C rystal must be 32.76 8 kHz with 1 2 .5 pF Clo a d . X1 on EVB operates from –40 to +85 ° C with ± 2 0 p p m –0.04 pp m/°C2

Note

maxim um tolerance. Confirm crystal selection meets tuning ppm requirements over desired application’s temp erature range. See data sheet for tuning ppm requirements.

J21,J22,J23,J24

L2

GOLD PLATED

CONN, THRU--HOLE, MCX JACK, .100 LAYOUT

SOLDER BUMP JUMPER, RES, SM, 0402

CONN,AUDIO JAC K,3.5MM, STEREO

IN, SM, 0603 120nH MURATA lqw18anr12j00d

IC,SM,ESD PROTECTION DIODE,SOT23-3

NP DIGI-KEY J611-ND

YAZAKI RA2EJ2-6G

DIGIKEY CP-3543N-ND MURA TA BLM18BD252SN1D

NATIONAL SEMICONDUCTOR

CALIFORNIA MICRO DEVICES

LM 4910MA

C M1213-01ST

Population Options:

No Popula te

Si471x- E VB C 1,C9,C10,C11,C12,C 13,C14,C15, F1,F 2, F3,J28,J29,L1,L3,L5R3,R7,R8,R9,R10,U2,U4 Si4704/5-E VB C8,J1,R 4,U3,U5

Rev. 0.4 83

Si47xx-EVB

Table 26. Si473x-EVB Daughtercard Rev 1.4—Bill of Materials

ITEM QTY RE FDES DE SCRIPTIO N VALUE MFG/Vendor MFG/Vendor_PN

12 2 1 C2 CAP,SM,0402,X7R 22NF MURATA GRM155R71E223KA61D 3 3 C9,C10,C11 CAP,SM,0402,X7R 100PF MURATA GRM1555C1H101JZ01D 4 3 C3,C5,C12 CAP,SM,0603,X7R 1NF VENKEL C0603C0G500-103JNE 5 2 C4,C6 CAP,SM,0402,X7R 22PF VENKEL C0402C0G500-220JNE 6 2 C8,C13 CAP,SM,0603,X7R 0.47UF 7 2 C14,C15 CAP,SM,0603,X7R 0.33UF VENKEL C0603X7R160-334KNE 8 3 F1,F2,F3 F ERRIET,SM,0603 2500ohm MURATA BLM18BD252SN1D 9 2 J1,J26 SMA,EDGE-MOUNT,GOLD PLATED YAZAKI RA2EJ2-6G

10 1 J2 T ER M INAL BLOC K, 12 POSI T I O N S A M T EC LCW -112-09-S-S- 230-RA

11 14 12 2

13 3 J4,J5,J6 14 2 J7,J8 CONN, TH, 1X3, HDR NP SAMTEC TSW-103-07-G-S 1 5 1 J11 HEAD ER, 3X12 NP SAMT EC T SW -112-07-G-T 16 1 J24 CONN,AUDIO JACK,3.5MM,STEREO DIGIKEY CP-3543N-ND 17 1 J25 CONN,SM,2X20,SFM SAMTEC SFM-120-02-S-D-A 18 19 2 L2 IND,SM,0603 OR VENKEL CR0603-16W-000T 20 1 L4 IND,SM,0603 270nH MURATA LQW18ANR27J00D 21 1 L3 IND,SM,0603 NP MURATA LQW18ANR12J00D 22 4 R1,R2,R3,R4 RES,SM,0402 20K VENKEL CR0603-16W-203JB 23 1 R6 RES,SM,0603 NP 24 1 R7 RES,SM,0402 10K VENKEL CR0402-16W-103JT

25 6 26 4 R5,R8 RES,SM,0402 NP 27 2 R10,C17 RES,SM,0402 2K VENKEL CR0402-16W -202T 28 1 C16 RES,SM,0402 604 VENKEL CR0402-16W-604r0T 29 1 U1 SI4730 SILABS 4730

30 1 U3 IC,SM,HEADPHONE AMP

31 2 U4,U5

32 2 U 2,U6 I C,S M,ESD PROTECTIO N DIO DE, SOT23-3 NP 3 3 1 X1 (See not e below) OSC , SM , Cr y stal 32. 768KH z,C hip 3 2. 768KH z Eps on F C- 135

Note

m axim um to leranc e. Confirm c ry s ta l se l ection m eets t uning ppm requirem ents ove r des i red applic atio n’s te m perature range. See data sheet for tuning ppm requirements.

C1,C7

J9,J10,J12,J13,J14, J15, J16,J17,J18,J19, J20, J 21, J 22, J 23 SOL D ER BU M P J UMPER , RE S, SM , 04 02

J3,J27,J28

2

L1 IND,SM,0603 220nH MURATA LQW18ANR22J00D

R9,R11,R12,R13, C18,C19

: Crys ta l m us t be 32. 768 kHz with 12. 5 pF C load. X1 on E VB operat es from –40 to +85 ° C wit h ±20 ppm –0. 04 ppm /°C 2

CAP,SM,0402,X7R 0.1UF MURATA GRM155R71C104KA88D

SOL D ER BU M P J UMPER , RES, SM , 04 02 N P CONN, THRU--HO LE , MCX J A CK ,

.100 LAYOU T

RES,SM,0402 0R VENKEL CR0402-16W-000T

IC,SM,ESD PROTECTION DIODE,SOT23-3

NP DIGI-KEY J611-ND

NATIONAL SEMICONDUCTO R

CALIFORNIA MICRO DEVICES

CALIFORNIA MICR O DEVICE S C M1 213-01ST

LM4910MA

CM1213-01ST

NP = Not Popu lated

84 Rev. 0.4

Si47xx-EVB

Table 27. Si4730 Ferrite Medium Antenna Rev 1.2—Bill of Materials

ITEM QTY REFDES DESC RIPTION VALUE MFG/Vendor MFG/Vendor_PN

1 1 J4 Soc ket Header, TH, Friction notch SAMTEC SSW-112-02 -G-P-RA 2 1 U1 Medium Ferrite Core SiLabs SL4X30MW110T 3 1 A1 PCB, Ferrite Antenna Boar d 4 1 Zip Tie 6in HellermannTyton T30R9C2

NP = Not Populated

Table 28. Si473x Ferrite Large Antenna Rev 1.2—Bill of Materials

ITEM QTY REFDES DESCRIPTION VALUE MFG/Vendor MFG/Vendor_PN

1 1 J4 Socket Header, TH, Friction notch SAMTEC SSW -112-02-G-P-RA 2 1 U1 Large Ferrite Co re SiLabs SL5X 7X100MW70T 3 1 A1 PCB, Ferrite Ant enna Boa rd 4 2 Zip Tie 6in H ellermannTyton T30R9C2

NP = Not Populated

Table 29. Si473x Airloop Antenna Rev 1.2—Bill of Materials

ITEM QTY REFDES DES CRIPTION VALUE MF G/Vendor MFG/Vendor_PN

1 1 J1 C ompresion C onnector (Speaker jack) KOB I (M o user) 151-0300-E 2 1 J2 Socket H eader, TH, Friction notch SAM TEC SSW-112-02-G-P-RA 3 1 U1 Transfomer, TH, Custom SiLabs SL9X5X4MWTF 4 1 A1 P CB, Air Loop Antenna Board

N P = Not Populated

Rev. 0.4 85

Si47xx-EVB

Table 30. Si473x SW/WB Antenna—Bill of Materials

ITEM QTY REFDES DESCRIPTION V ALUE M FG/Ve ndor

1 1 C1 CAP,SM,0402,C0G 18pF V ENKEL

2 1 C2 CAP,SM,0402,C0G 33pF V ENKEL

Socket Header, TH,

31J1

41J2 5 1 J3 Large Ferr ite Core SiLabs 6 1 L1 IND,SM,0603 470nH MURATA 7 1 L2 IND,SM,1008 4.7uH COILCRAFT 8 1 S1 SPDT Switch E-switch

91U1

10 1 A 1 11 2 X1,X3 Z ip Tie 6in HellermannTyton

NP = Not Populated

Friction notch BNC,EDGE-MOUNT,

GOLD PLATED

IC,SM,ESD PROT ECT ION DIODE, SOT23- 3

PCB, Short Wav e A ntenna Board

SA MTEC

MOUSER

CALIFORNIA MICRO DEVICES

Population Options

Weather Band Antenna Card

C1 and C2 RES,SM,0402 0 VENKEL L1 IND,SM,0603 68 nH MURATA L2 NP S1 NP

86 Rev. 0.4

12. Schematics

12.1. Si47xx-EVB Baseboard Rev 1.4

Si47xx-EVB

Figure 61. Si47xx-EVB Baseboard Rev 1.4 Block Diagram

Rev. 0.4 87

Si47xx-EVB

88 Rev. 0.4

Figure 62. Si47xx-EVB Baseboard Rev 1.4 Daughtercard Interface

Si47xx-EVB

Figure 63. Si47xx-EVB Baseboard Rev 1.4 Signal Multiplexers

Rev. 0.4 89

Si47xx-EVB

90 Rev. 0.4

Figure 64. Si47xx-EVB Baseboard Rev 1.4 CODEC

Si47xx-EVB

Note: For EN55020 compliance, please add the following components to L-OUT and R-OUT @ J6: 1 µF from C5 x C7 to GND

(one for each output), 22.6

Ω in series with C5 x C7 (one for each output).

Figure 65. Si47xx-EVB Baseboard Rev 1.4 Audio Input and SPDIF Translator

Rev. 0.4 91

Si47xx-EVB

92 Rev. 0.4

Figure 66. Si473x-EVB Baseboard Rev 1.4 MCU

Si47xx-EVB

Figure 67. Si473x-EVB Baseboard Rev 1.4 Power Supply

Rev. 0.4 93

Si47xx-EVB

12.2. Si471x/2x-EVB Daughtercard Rev 1.4

94 Rev. 0.4

Figure 68. Si471x/2x-EVB Daughtercard (Rev 1.4)

Si47xx-EVB

Figure 69. Si471x/2x-EVB Daughtercard (Rev 1.4) Headphone Schemat ic

(applies only to Si470x/2x)

Si471x/2x-EVB Daughtercard (Rev 1.4) ships configured for external RCLK, supplied by the Si47xx-EVB Baseboard. To configure for crys tal oscillator operation:

1. Remove R5.

2. Remove short at J24.

3. Short J26.

4. Short J27.

5. Select "Use XOSCEN" at GUI initialization.

Note: Digital Audio Output is not available when configured for crystal oscillator.

Rev. 0.4 95

Si47xx-EVB

12.3. Si473x-EVB Daughtercard Rev. 1.4

96 Rev. 0.4

Figure 70. Si473x-EVB Daughtercard Rev. 1.4 (1 of 2)

Si47xx-EVB

Figure 71. Si473x-EVB Daughtercard Rev 1.4 (2 of 2)

Si473x-EVB Daughtercard (Rev 1.4) ships configured for external RCLK, supplied by the Si47xx-EVB Baseboard. To configure for crystal oscillator operation:

1. Remove R9.

2. Remove R10.

3. Short J27.

4. Short J28.

5. Select "Use XOSCEN" at GUI initialization.

Note: Digital Audio Output is not available when configured for crystal oscillator.

Rev. 0.4 97

Si47xx-EVB

12.4. Antenna Card Schematics

12.4.1. Si473x Ferrite Antenna Card Rev 1.2

Figure 72. Ferrite Antenna Card Rev 1.2

12.4.2. Si473x Air Loop Antenna Card Rev 1.2

98 Rev. 0.4

Figure 73. Airloop Antenna Card Rev 1.2

12.4.3. Si473x SW/WB Antenna Card Rev 1.3

Si47xx-EVB

Note: If an SW band is selected using the SW/WB Antenna Card, set the varactor to 1 for best performance. LW

not supported with SW/WB Antenna Card.

Figure 74. Si473x SW/WB Antenna Card Rev 1.3

Rev. 0.4 99

Si47xx-EVB

13. Layout

13.1. Si47xx-EVB Baseboard Rev 1.4

Figure 75. Si47xx-EVB Baseboard Rev 1.4—Primary Assembly Silkscreen

Figure 76. Si47xx-EVB Baseboard Rev 1.4—Secondary Assembly Silkscreen

100 Rev. 0.4

Silicon Labs Si4704, Si4703, Si4705, Si4706, Si4707 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual