SI4840-DEMO

Si4840/44-DEMO Si4840/44 D EMO B OARD U SER ’ S G UIDE 1. Features  ATDD (analog tune and digital display) FM/AM/SW radio  Worldwide FM band support from 64 to 109 MHz with 5 default sub-bands: FM1 FM2 FM3 FM4 FM5  Worldwide AM band support from 504 to 1750 kHz with 5 default sub-bands: AM1 AM2 AM3 AM4 AM5  SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10 SW11 SW12 SW13 SW14 SW15 SW16           520–1710 kHz (Demo Board Default) 522–1620 kHz(Demo Board Default) 504–1665 kHz 520–1730 kHz 510–1750 kHz Worldwide SW band support from 2.3 MHz to 28.5 MHz with 16 default sub-bands: SW1  87–108 MHz (Demo Board Default) 86.5–109 MHz 87.3–108.25 MHz 76–90 MHz 64–87 MHz (Demo Board Default) 5.6–6.4 MHz (Demo Board Default, for Si4844 only) 5.95–6.2 MHz 6.8–7.6 MHz (Demo Board Default, for Si4844 only) 7.1–7.6 MHz 9.2–10 MHz (Demo Board Default, for Si4844 only) 9.2–9.9 MHz 11.45–12.25 MHz (Demo Board Default, for Si4844 only) 11.6–12.2 MHz 13.4–14.2 MHz (Demo Board Default, for Si4844 only) 13.57–13.87 MHz 15–15.9 MHz (Demo Board Default, for Si4844 only) 15.1–15.8 MHz 17.1–18 MHz (Demo Board Default, for Si4844 only) 17.48–17.9 MHz 21.2–22 MHz (Demo Board Default, for Si4844 only) 21.45–21.85 MHz Twelve-position slide switch or one push button for selecting different bands according to the target application Two AAA battery operations with working voltage down to 2.0 V Economical potentiometer for frequency tuning replaces more expensive variable capacitor (PVC) Potentiometer and/or push button volume control FM 50 µs or 75 µs (default) de-emphasis FM stereo indication threshold 6 dB separation at 20 dBµv RF input (default) or 12 dB separation at 28 dBµv RF input 9-level Bass/Treble via push button control for FM 7-level Bass/Treble via push button control for AM/SW FM/AM/SW band indicator and frequency display in LCD 2x4 matrix keypad The frequency range of each band, the ST indication threshold, de-emphasis and AM channel space can be reconfigured by host MCU. Rev 0.1 8/11 Copyright © 2011 by Silicon Laboratories Si4840/44-DEMO Si4840/44-DEMO 2. Overview This manual describes the operation of the Silicon Labs Si4840/44-DEMO board, Rev 1.3, June 30, 2011. The Silicon Laboratories Si4840/44 DEMO board is designed with the 24-pin SSOP-packaged Si4840/44 chip, the revolutionary single chip AM/FM/SW receiver that integrates everything from antenna output to audio input and allows use of common and economical potentiometers to do the frequency tuning. It provides a complete portable analog tune digital display AM/FM/SW radio design. The LCD displays the tuning information. The Si4840/44DEMO is designed with 1-layer PCB, allowing the lowest cost without sacrificing the RF performance. The demo board works with two AAA batteries and working voltage down to 2.0 V. 3. Description Figure 1 and Figure 2 show the physical layout of the board with key components indicated. Figure 1. Si4840/44-DEMO Board Top Side in Time Mode 2 Rev 0.1 Si4840/44-DEMO Figure 2. Si4840/44-DEMO Board Bottom Side Power: BAT1: 2 cells AAA battery compartment Audio connectors: J5: Stereo audio headphone output Antenna selections: AM antenna: Ferrite stick antenna for AM J6: SMA connector for AM conductive test S11: AM antenna selection 1 2 3 1-2: SMA for AM Conductive Test (J6) 2-3: AM ferrite antenna J1: BNC connector for FM/SW conductive test or FM whip antenna Rev 0.1 3 Si4840/44-DEMO S12: FM antenna selection 1 2 3 1-2 BNC (J1) 2-3 HP ANT (J5) Radio Band selection: The Demo board provides 2 methods to select the radio band. One is to use the slide switch (S2); the other is to use the POWER/BAND push button. S14 determines which method is in use. S14: 3 2 1 2-3: Use slide switch to select band 1-2: Use push button to select band Radio Band Property setting: S13: 1 2 3 1-2: Use the keypad to set the band property via MCU 2-3: Use the tuner default band setting values 4 Rev 0.1 Si4840/44-DEMO Audio output test point: For general specification test, TP3 is the recommended audio signal test point. The audio test instrument should be connected to TP3 to get more accurate test results. J5 can also be used as an audio test point, but the test results may not be entirely accurate under some circumstances. TP3: 1 GND 2 Lout 3 Rout Main components: U1: Silicon Laboratories Si484x FM/AM/SW ATDD tuner U2: Audio amplifier U3: MCU LCD: The digital display of tuning information Control interface: VR1: Frequency tuning wheel VR2: Volume control wheel S3~S10: The keypad for human interface S2: Band slide switch for FM, AM, and SW 1 2 3 4 5 6 7 8 9 10 11 12 Band definition: 1: FM1 (87–108 MHz), De-emphasis=75 us, ST indication=6 dB separation@20 dBµV 2: FM5 (64–87 MHz), De-emphasis=75 us, ST indication=6 dB separation@20 dBµV 3: AM1 (520–1710 kHz), 10 kHz spacing 4: AM2 (522–1620 kHz), 9 kHz spacing 5: SW1 (5.6–6.4 MHz) 6: SW3 (6.8–7.6 MHz) 7: SW5 (9.2–10.0 MHz) 8: SW7 (11.45–12.25 MHz) 9: SW9 (13.4–14.2 MHz) 10: SW11 (15–15.9 MHz) 11: SW13 (17.1–18 MHz) 12: SW15 (21.2–22 MHz) Rev 0.1 5 Si4840/44-DEMO Human Interface: There are 8 keys for controlling the demo board as shown below. TREBLE/AL BASS/TMR DE/SPC POWER/BAND SETTING MONO/ST DOWN/VOL- UP/VOL+ Each key can have a different function under each operating condition:   Time mode: Radio function is disabled. LCD displays time. Buttons can be used to set time, alarm, etc. FM/AM/SW Radio mode: Tuner IC works in power up mode. Radio function is enabled. LCD displays the radio station parameters. Buttons are used to adjust radio settings.The functions of the buttons are summarized in Table 1. The FM/AM/SW radio parameters which can be configured are listed in Table 2. Table 1. Key Function Description Time Mode Tuner Off FM/AM/SW Radio Mode Tuner On Hold Time < 1s None Change between FM, AM, and SW (there are 1 FM band, 1 AM band and 8 SW bands) Hold Time > 1s Enable radio Disable radio function and enter Time mode. (Radio parameters will be saved to MCU.) Button POWER/BAND FM mode: Change De-emphasis, between 50 and 75 us. AM mode: Change channel space, between 9 kHz and 10 kHz. DE/SPC None BASS/TMR Enter or quit setting menu. Decrease Bass/Treble level by 1 step. TREBLE/AL Enable or disable the alarm function; enter or quit alarm setting menu. Increase Bass/Treble level by 1 step. In setting menu, change In radio setting menu, change the current parameter the current time/alarm by one unit per each press. In radio working mode, Hold Time < 1s parameter by one unit per increase volume 1 step per each press. each press. UP/VOL+ Hold Time > 1s DOWN/VOL- 6 In radio setting menu, change the current parameter In setting menu, change automatically. the current time/alarm In radio working mode, increase volume level autoparameter automatically. matically until to maximum. In setting menu, change In radio setting menu, change the current parameter the current time/alarm by one unit per each press. In radio working mode, Hold Time < 1s parameter by one unit per decrease volume 1 step per each press. each press. Rev 0.1 Si4840/44-DEMO Table 1. Key Function Description (Continued) Button Hold Time > 1s Time Mode Tuner Off FM/AM/SW Radio Mode Tuner On In radio setting menu, change the current parameter automatically. In setting menu, change the current time/alarm In radio working mode, decrease volume level automatically until to parameter automatically. minimum. None FM mode: change between forced mono audio and ST audio. Hold Time < 1s None In radio setting menu, change the selected item per each press. Hold Time > 1s None Quickly return to FM working mode. MONO/ST SETTING Rev 0.1 7 Si4840/44-DEMO Table 2. Radio Configuration Parameters FM parameter AM Parameter Bass/Treble: 0-8 Default: 4 Bass/Treble: 1-7 Default: 3 Bass/Treble: 1-7 Default: 3 Digital Volume: 0-63 Default: 63 Digital Volume: 0-63 Default: 63 Digital Volume: 0-63 Default: 63 Band Top: Max 109 MHz Default: 108 MHz Band Top: Max 1750 kHz Default: 1710 kHz Band Top: Max 28.5 MHz Default: 6.4/7.6/10/12.25/14.2/1 5.9/18/22 MHz for SW1 to SW8 respectively. Band Bottom: Min 64 MHz Default: 87.5 MHz Band Bottom: Min 504 MHz Band Bottom: Min 2.3 MHz Default: 522 MHz Default: 5.6/6.8/9.2/11.45/13.4/ 15/17.1/21.2 MHz for SW1 to SW8 respectively Band Range: Max 22 MHz Band Range: Max 2.2 MHz Band Range: Max 1.1 MHz De-emphasis: 50 or 75 µs Default: 75 s Channel space: 9 or 10 kHz Default: 9 kHz Blend mono: 0-127 dBµV Default: 8 dBµV Blend stereo: 0-127 dBµV Default: 49 dBµV Blend separation: 0-100% Default: 50% Tone/VOL mode: a-d Default: d Tuning preference: a-d Default: a 8 SW Parameter Rev 0.1 Si4840/44-DEMO Notes: Tone/VOL mode has 4 selections:  Bass/treble mode: no digital volume control, fixed volume level at 59. Digital volume mode: no bass/treble effect, volume levels from 0 to 63.  Mixed mode 1: bass/treble and digital volume coexist, volume levels from 0 to 63, scale to 0~59.  Mixed mode 2: bass/treble and digital volume coexist, volume levels from 0 to 63.  The tuning preference of FM mode has 4 selections:  Preference 1: When tuning to adjacent channels, allow stereo separation and stereo indicator is on, volume level decreases by 2 dB.  Preference 2: When tuning to adjacent channels, allow stereo separation and stereo indicator is on, volume level is unchanged.  Preference 3: When tuning to adjacent channels, disable stereo separation and stereo indicator is off, volume level decreases by 2 dB.  Preference 4: When tuning to adjacent channels, disable stereo separation and stereo indicator is off, volume level is unchanged. The tuning preference of SW mode has 2 selections:  Preference 1: When tuning to adjacent channels, the volume level decreases by 2 dB. Preference 2: When tuning to adjacent channels, the volume level remains unchanged. There is no tuning preference selection for AM mode.  Rev 0.1 9 Si4840/44-DEMO 4. Operation The Si4840/44-Demo Board, a complete analog tune and digital display radio, provides two major modes of operation: Time Mode and FM/AM/SW Radio Mode. 4.1. Time Mode Put 2 AAA batteries into the battery compartment. The board will automatically enter Time Mode and display the time. The demo board display in Time Mode is illustrated in Figure 1. 4.1.1. Time Setting The time default value is 00:00 and can be set to the correct time manually when needed. 1. In Time Mode, press the BASS/TMR button to enter the setting menu. The default is to set the minute item first. Press this button again to select the hour item. The selected item flashes. 2. While the selected item is flashing, press the DOWN/VOL- and UP/VOL+ button to set the desired time. 3. When you have finished setting the time, press the BASS/TMR button to quit the setting menu. The MCU automatically quits the setting menu if there is no operation within 2 seconds. 4.1.2. Alarm Setting 1. In Time Mode, press the TREBLE/AL button to enable or disable the alarm function, and enter the setting menu automatically when the alarm is enabled. Once you have entered the setting menu, the default is to set the minute item first. Press this button again to select the hour item. The selected item flashes. 2. While the selected item is flashing, press the DOWN/VOL- and UP/VOL+ button to set the desired time. 3. When you have finished the alarm setting, press the TREBLE/AL button to quit the setting menu. The MCU automatically quits the setting menu if there is no operation within 2 seconds. 4. If the alarm is enabled and the alarm setting time is matched, the radio will be automatically turned on after the buzzer sounds for 5 seconds. 5. The radio will be turned off and the demo board will go into sleep mode automatically if there is no operation on the buttons within 15 minutes; if there is any operation on the buttons, the auto-sleep function will be disabled. The radio keeps working throughout this time. 4.2. FM/AM/SW Radio Mode In Time Mode, long press (hold time >1s) the POWER/BAND button or when the alarm time is reached, the device will enter FM/AM/SW mode. The LCD displays the following information: band indicator, band frequency indicator, stereo indicator, and sleep indicator in case radio is automatically turned on by the alarm. The demo board display in FM/AM/SW Mode is illustrated in Figure 3. 10 Rev 0.1 Si4840/44-DEMO Figure 3. LCD Display in FM Radio Mode The demo board provides two methods to select the radio band. One is to use the slide switch (S2). The other is to use the POWER/BAND push button. S14 determines which method is in use. The demo board also provides two methods to set the band property. One is to use the tuner default values; the other is to use the keypad to reconfigure the band property value via the MCU. S13 determines which method is in use. If you use the tuner default values, the band property is fixed and cannot be reconfigured. Refer to section “4.2.1. MCU Setting Band Property” for the operation details for setting the band property using the keypad. To operate the demo board, follow these procedures: 1. According to the desired radio band selection method, set S14 to use the slide switch or push button. 2. According to the desired radio band property, set S13 to use tuner default values or reconfigure the band property. 3. Hold the POWER/BAND push button (hold time >1s) or when the alarm time is reached, the device will enter FM/AM/SW Radio Mode. 4. Use slide switch S2 or press the POWER/BAND push button to select the desired band. 5. Refer to section “4.2.1. MCU Setting Band Property” or section “4.2.2. MCU Setting Radio Working Mode” to reconfigure the band property or radio working mode if necessary. 6. Rotate the turning wheel and find the desired radio station with the help of the LCD display and/or tuning indicator D1. 7. Rotate the volume control wheel VR2 and/or press the DOWN/VOL- or UP/VOL+ button to get a comfortable volume. Press the BASS/TMR or TREBLE/AL button to get the desired bass/treble level. Notes:  For FM listening, the earphone cable must be connected to the board when S12 is set to HP ANT or an external antenna must be connected to the BNC connector when S12 is set to BNC.  For AM listening, the ferrite antenna must be connected to the board and the S11 is set to Ferrite before turning on the radio or switching the band to AM. Rev 0.1 11 Si4840/44-DEMO 4.2.1. MCU Setting Band Property The demo board provides the function that the band property can be set by MCU. The band property includes:  Band top Band bottom  Blend mono (only for FM)  Blend stereo (only for FM)  Blend separation (only for FM)  De-emphasis (only for FM)  Channel Space (only for AM) The setting menu is illustrated in Figure 4.  To set the band properties, follow these steps: 1. Press the SETTING button to enter the setting menu and select the item to be set. The selected item flashes for 1 second, then automatically switches to its current value. 2. While the value is flashing, press the DOWN/VOL- or UP/VOL+ button to set the desired value within 3 seconds. 3. Repeat steps 1 and 2 to finish setting the band properties. 4. When the band properties are set, the MCU automatically quits the setting menu if there is no operation within 3 seconds. 5. In FM working mode, press the DE/SPC button to set the De-emphasis to 50 or 75 µs. 6. IN AM working mode, press the DE/SPC button to set the Channel Space to 9 kHz or 10 kHz. SETTING MENU: 1 BAND TOP 2 BAND BOTTOM 3 BLEND MONO 4 BLEND STEREO 5 BLEND SEPARATION 6 TONE/VOL MODE a Bass/Treble MODE 7 Tuning preference b Dig-Vol MODE c MIX MODE1 d MIX MODE2 a preference1 b preference2 c preference3 d preference4 Figure 4. Setting Menu 12 Rev 0.1 Si4840/44-DEMO 4.2.2. MCU Setting Radio Working Mode The host MCU can set the radio working mode. The working mode includes:  Tone/volume mode (only for FM mode), item 6 in the setting menu Tuning preference (only for the FM and SW), item 7 in the setting menu  Forced mono audio/ST audio (only for FM) To set the radio working mode, follow these steps:  1. Press the SETTING button to enter item 6. The LCD displays the item number st6 for 1 second, then automatically switches to its mode indication. 2. Press the DOWN/VOL– or UP/VOL+ button to select the desired mode within 3 seconds. 3. Repeat steps 1 and 2 to set the tuning preference by setting item 7. 4. When the radio working mode is set, the MCU automatically quits the setting menu if there is no operation within 3 seconds. 5. Press the MONO/ST button to select forced mono audio or ST audio in FM mode when necessary. Rev 0.1 13 Si4840/44-DEMO 5. Bill of Materials  ATDD AM/FM/SW receiver IC Si484x with external 32.768 kHz crystal oscillator support  LM4910MA Audio Amplifier IC  TM8795 MCU See Table 3 for details. Table 3. Si4840/44-DEMO Board Bill of Materials Rev. 1.3 Item Qty Reference Description Value 1 12 C1-2, C6, C19, C24, C37-42, C44 CAP,SM,0603,X7R 0.1u 2 2 C5, C36 CAP,SM,0603,X7R 0.47u 3 3 C8-10 CAP,SM,0603,COG 100p 4 1 C33 CAP,SM,0603,COG 10p 5 4 C4, C7, C12, C21 CAP,SM,0603,X7R 10u 6 4 C28-29, C32, C35 CAP,SM,0603,COG 22p 7 2 C11, C20 CAP,SM,0603,COG 330p 8 2 C30-31 CAP,SM,0603,COG 33n 9 1 C34 CAP,SM,0603,COG 33p 10 1 C15 CAP,SM,0603,X7R 4.7u 11 1 C13 CAP,SM,1210,X7R 47u 12 2 C18, C22 CAP,SM,0603,COG 820p 13 3 C23, C26, C27 CAP,SM,1210,X7R 220u 14 2 C14, C25 Electrolytic capacitor 100u/4V 15 1 C3 Electrolytic capacitor 220u/4V 16 1 R27 RES,SM,0603 100R 17 1 R34 RES,SM,0603 100k 18 1 R32 RES,SM,0603 10R 19 2 R3, R42 RES,SM,0603 10k 20 1 R41 RES,SM,0603 120k 21 2 R17, R22 RES,SM,0603 12k 22 2 R1-2 RES,SM,0603 1M 23 2 R4, R31 RES,SM,0603 1k 24 1 R24 RES,SM,0603 200R 14 Rev 0.1 Si4840/44-DEMO Table 3. Si4840/44-DEMO Board Bill of Materials Rev. 1.3 (Continued) Item Qty Reference Description Value 25 1 R13 RES,SM,0603 22R 26 2 R5-6 RES,SM,0603 2k 27 2 R16, R18 RES,SM,0603 2.2k 28 1 R46 RES,SM,0603 4.7M 29 2 R19-20 RES,SM,0603 6.8k 30 1 R21 RES,SM,0603 NP 31 1 R7 RES,SM,0603,Tolerance ±1% 10k 1% 32 1 R29 RES,SM,0603,Tolerance ±1% 160k 1% 33 9 R9-12, R14-15, R28, R33, R35 RES,SM,0603,Tolerance ±1% 20k 1% 34 1 R43 RES,SM,0603,Tolerance ±1% 30k 1% 35 1 R36 RES,SM,0603,Tolerance ±1% 33k 1% 36 1 R8 RES,SM,0603,Tolerance ±1% 40k 1% 37 1 R44 RES,SM,0603,Tolerance ±1% 47k 1% 38 1 U1 SI484x-A SSOP24 39 1 U2 LM4910MA,SO8 LM4910MA 40 1 U3 TM8795 44 PIN TM8795 44 PIN 41 1 Q2 TRANSISTOR NPN SOT23 2N3904 42 1 Q1 TRANSISTOR NPN SOT23 2SC9018 43 1 Q3 TRANSISTOR NPN SOT23 2N3906 44 2 D2 D4 DIODE,SM,ESD,SOT23 BAV99 45 4 B4, B5, B6, B7 FERRITE BEAD,SM,0603 2.5k/100M 46 1 B1 FERRITE BEAD,SM,0603 NP 47 1 BZ1 BUZZER BUZZER 48 2 Y1-2 CRYSTAL 32.768KHz 49 1 D1 LED 50 1 D6 1N4148 1N4148 51 1 J5 Stereo earphone jack with switch 3.5mm 52 1 L1 RES,SM,0603 0R 53 1 L2 IND,SM,0603 270nH Rev 0.1 Si4844-A LED 15 Si4840/44-DEMO Table 3. Si4840/44-DEMO Board Bill of Materials Rev. 1.3 (Continued) Item Qty Reference Description Value 54 2 L3, L4 IND,SM,0603 55 1 LCD1 LCD 56 1 J1 BNC VERTICAL BNC for FM testing 57 1 J6 SMA VERTICAL SMA for AM testing 58 1 ANT1 AW ferrite stick antenna 59 1 BAT1 BATTERY BOX ,AAA*2 SIZE 60 4 S11-14 One pole two throw switch 61 1 S2 Single pole twelve throw switch 62 8 S3-10 Push button DIP Push button 63 1 S1 Push button SM Push button 64 1 TP3 CONN,TH,1x3,HDR 65 1 VR1 100k,±10%,Variable resistor(POT) 100k 66 1 VR2 10k,±20%,Variable resistor(POT) 10k 16 Rev 0.1 120nH LCD 220uH CONN,TH,1x3,HDR Rev 0.1 2.5k/100M B6 LNA_EN [1] R34 100k 33n C30 R41 120k C31 33n R32 10R 10p R31 1k C33 S11 Q1 2SC9018 VCC 3 2 RESET [2] 12 10k R3 C19 0.1u 11 2k R6 C34 33p L2 270nH 47u 100R R27 0.1u VR1 100k 10% C28 22p 32.768KHz Y1 R46 4.7M C6 C15 C29 22p R21 NC 0.1u 4.7u 2 U1 1 3 Si4840/44-A S13 [1] TUNE1 [2] IRQ [1] LNA_EN 10k R42 [2] XTALI C4 10u C7 10u VCC C39 0.1u VCC L4 120nH L3 120nH C14 100u/4V 10u C21 10u C12 2-1 MCU Setting 2-3 Tuner default S13: Band property BAT1 AAA*2 R18 2k2 R16 2k2 820p C22 820p C18 12k R17 12k R22 R5 2k 4 3 2 1 U2 C11 LM4910MA GND SHUTDOWN IN2 IN1 R20 C20 6k8 R19 330p C25 100u/6.3V VDD VO3 VO2 VO1 330p 6k8 5 6 7 8 C24 0.1u C27 220u C26 220u C23 220u TP3 C8 100p C9 100p C10 100p 3 2 1 B4 2k5/100M B7 2k5/100M B5 2k5/100M Rout GND Lout 1 2 3 [1] FMI Audio output J5 BAND [1] 2-1 push button 2-3 slide switch S14 2 S14: Band Selection Figure 5. Si4840/44 DEMO Board Rev 1.3 Schematic–Radio and Audio Portions D2 BAV99 C5 0.47u 1 S12 9 C36 0.47u [1] FMI 10 AMI GND 13 NC GND 14 8 FMI RFGND 6 SDIO 17 SCLK [2] NC [1] BAND 5 SCLK 16 SDIO [2] RST 15 7 18 NC 4 NC XTALO 19 XTALI 3 BAND VDD1 20 1 LNA_EN 2 TUNE2 VDD2 21 IRQ TUNE1 DBYP 22 ROUT 23 LOUT 24 C1 TP2 C13 TP1 L1 0R/120nH VCC J6 VCC VR2-A VR2-B MW Test point ANT1 MW ferrite antenna [2] SHUTDOWN VCC J1 B1 D4 BAV99 NC FM/SW 3 1 VCC 1 S2 2 3 4 5 6 7 8 9 10 11 12 13 TUNE1 [1] R44 47k 1% R33 20k 1% R29 160k 1% 20k 1% R28 10k 1% R7 40k 1% R8 R9 20k 1% R14 20k 1% R11 20k 1% R12 20k 1% R10 20k 1% R15 20k 1% R35 20k 1% R43 30k 1% R36 33k 1% FM1 (87MHz - 108MHz) FM5 (64MHz - 87MHz) AM1 (520kHz - 1710kHz) AM2 (522kHz - 1620kHz) SW1 (5.6MHz - 6.4MHz) SW3(6.8MHz - 7.6MHz) SW5(9.2MHz - 10.0MHz) SW7(11.45MHz - 12.25MHz) SW9 (13.4MHz - 14.2MHz) SW11 (15MHz - 15.9MHz) SW13 (17.1MHz - 18MHz) SW15 (21.2MHz - 22MHz) Si4840/44-DEMO 6. Schematics and Gerbers 17 18 FM MW SW Rev 0.1 XIN SEG27/IOA4 SEG26/IOA3 XOUT SEG25/IOA2 GND SEG24/IOA1 SEG23 SEG22 VDD3 SEG21 CUP1 SEG12(K12) CUP2 SEG11(K11) COM1 SEG10(K10) SEG9(K9) SLEEP [2] LCD_S13 SEG28/IOB1/ELC SEG29/IOB2/ELP SEG30/IOB3/BZB SEG31/IOB4/BZ SEG32/IOC1/KI1 34 35 36 37 38 39 40 41 [2] LCD_S13 [1] SHUTDOWN [2] BZ [2] KEY_C0 [2] KEY_C1 [2] KEY_C2 [2] KEY_C3 R24 VCC Q3 2N3906 17 [2] LCD_S12 SEG8(K8) SEG7(K7) SEG6(K6) SEG5(K5) VDD2 16 [2] LCD_S11 22 21 20 19 SEG4(K4) SEG33/IOC2/KI2 SEG34/IOC3/KI3 D1 Tuning indicator SEG13 15 [2] LCD_S10 [2] [2] LCD_S4 LCD_S5 [2] [2] LCD_S3 LCD_S2 18 VDD1 SEG12 14 [2] LCD_S9 [2] LCD_S8 [2] LCD_S1 SEG3(K3) SEG2(K2) COM2 SEG11 SEG10 13 12 11 [2] LCD_S7 [2] LCD_S0 17 16 42 S1 SEG9 SEG8 SEG7 [2] LCD_S6 [2] BAK SEG35/IOC4/KI4 C32 22p KEY_R1 SEG1(K1) C42 0.1u 10 [2] LCD_S5 15 43 44 RESET 9 [2] RESET INT TEST VCC SEG6 SEG5 KEY_R0 11 COM5 10 14 LCD_C1 [2] LCD_C2 [2] COM4 9 [2] LCD_S4 VCC COM3 C38 0.1u 13 12 8 8 [2] 7 SEG4 LCD_C3 C44 0.1u [2] LCD_S3 XTALI [1] 7 6 [2] LCD_S2 5 6 U3 SEG3 4 [2] LCD_S1 R1 1M SEG2 3 [2] LCD_S0 2 5 1 4 Y2 32.768KHz SEG1 3 C35 22p SEG0 COM3 [2] LCD_C3 [2] LCD_C2 [2] LCD_C1 C37 0.1u VCC 2 1 C41 0.1u COM2 COM1 Si4840/44-DEMO R2 1M 200R IRQ [1] 33 32 [1] SCLK 31 [1] RESET 30 [1] SDIO 29 [2] LCD_S12 28 [2] LCD_S11 27 [2] LCD_S10 26 [2] LCD_S9 25 [2] LCD_S8 24 [2] LCD_S7 23 [2] LCD_S6 C40 0.1u MCU LCD1 PM MHz KHz MHz Figure 6. Si4840/44 DEMO Board Rev. 1.3 Schematic – MCU Portion (1 of 2) Si4840/44-DEMO S7 S3 UP/VOL+ KEY_C0 [2] KEY_C1 [2] KEY_C2 [2] S8 S4 DOWN/VOL- DE/SPC S9 S5 MONO/ST BASS/TMR S10 S6 SETTING KEY_C3 [2] KEY_R0 [2] KEY_R1 [2] SETTING MENU: POWER/BAND 1 BAND TOP 2 BAND BOTTOM 3 BLEND MONO 4 BLEND STEREO 5 BLEND SEPARATION 6 TONE/VOL MODE 7 Tuning preference TREBLE/AL a Bass/Treble MODE b Dig-Vol MODE c MIX MODE1 d MIX MODE2 a preference1 b preference2 c preference3 d preference4 KEY VCC R13 22R C2 0.1u C3 220u/4V D6 1N4148 R4 BZ BZ1 Q2 2N3904 [2] 1k BUZZER Figure 7. Si4840/44 DEMO Board Rev. 1.3 Schematic – MCU Portion (2 of 2) Rev 0.1 19 Si4840/44-DEMO Figure 8. Si4840/44-DEMO Board Gerber Rev 1.3 20 Rev 0.1 Si4840/44-DEMO NOTES: Rev 0.1 21 Smart. Connected. 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