Si4844-B-DEMO Si4844-B D EMO B OARD U SER ’ S G U I D E 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 87–108 MHz (Demo Board Default) 86.5–109 MHz FM3 87.3 –108.25 MHz FM4 76– 90 MHz FM5 64–87 MHz (Demo Board Default) FM2 Worldwide AM band support from 504 kHz to 1750 kHz with 5 default sub-bands: AM1 520–1710 kHz (Demo Board Default) 522–1620 kHz (Demo Board Default) AM3 504–1665 kHz AM4 520–1730 kHz AM5 510 –1750 kHz AM2 Worldwide SW band support from 2.3 to 22 MHz with 16 default sub-bands: SW1 5.6–6.4 MHz (DEMO Board Default) SW2 5.95–6.2 MHz SW3 6.8–7.6 MHz (DEMO Board Default) SW4 7.1–7.6 MHz SW5 9.2 –10 MHz (DEMO Board Default) SW6 9.2–9.9 MHz SW7 11.45 –12.25 MHz (DEMO Board Default) SW8 11.6–12.2 MHz SW9 13.4–14.2 MHz (DEMO Board Default) SW10 13.57 - 13.87 MHz SW11 15–15.9 MHz (DEMO Board Default) SW12 15.1–15.8 MHz SW13 17.1–18 MHz (DEMO Board Default) SW14 17.48–17.9 MHz SW15 21.2–22 MHz (DEMO Board Default) SW16 21.45–21.85 MHz Supports wider FM/SW band range Twelve positions 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 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 2×4 matrix keypad The frequency range of each band, de-emphasis, and AM channel space can be re-configured by host MCU. Rev. 0.1 5/13 Copyright © 2016 by Silicon Laboratories Si4844-B-DEMO Si4844-B-DEMO 2. Overview This manual describes the operation of the Silicon Labs Si4844 DEMO board Rev1.4, Mar 12, 2013. The Silicon Laboratories Si4844-DEMO board is designed with the 24-pin SSOP packaged Si4844-B chip, the revolutionary single chip AM/FM/SW receiver that integrates everything from antenna input to audio output 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 Si4844-DEMO 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 shows the physical layout of the board with key components indicated. Figure 1. Si4844-DEMO Board Top Side in Time Mode 2 Rev. 0.1 Si4844-B-DEMO Figure 2. Si4844-DEMO Board Bottom Side Rev. 0.1 3 Si4844-B-DEMO Power: BAT1: 2 cells AAA battery holder 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 selector 1-2: SMA for AM Conductive Test (J6) 2-3: AM Ferrite Antenna 1 2 3 J1: BNC connector for FM/ SW conductive test or FM whip antenna S12: FM antenna selector 1 2 1-2: FM HP ANT (J5) 2-3: FM BNC (J1) 3 Radio Band Selection: The demo board provides two methods for selecting 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 2-3: Use slide switch to select band 1-2: Use push button to select band 1 4 Rev. 0.1 Si4844-B-DEMO Radio Band Property Setting S13: 1 2-3: Use the keypad to set the band property via MCU 2 1-2: Use the tuner default band setting values 3 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 Lout 2 Rout 3 GND Tuner Output Test Point: For the tuner specification test, TP1 is the recommended tuner output test point. The audio test instrument should be connected to TP1 to get accurate test results. 1 2 3 Rout Lout GND TP1: Main Components: U1: Silicon Laboratories Si4844-B FM/AM/SW ATDD receiver U2: Audio amplifier U3: MCU LCD: The digital display for tuning information Rev. 0.1 5 Si4844-B-DEMO Control Interface: VR1: Frequency tuning wheel VR2: Volume control wheel S3~S10: The keypad for human interface S2: Band switch for FM, AM, and SW 1 2 3 4 5 6 7 8 9 10 11 12 Band definition for the slide switch is as follows: 1: FM1 (W 64–108 MHz) (N 87–108 MHz), ST indication = 6 dB separation@20 dBµV 2: FM5 (W 76–108 MHz) (N 64–87 MHz), 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 (W 3.2–7.6 MHz) (N 5.6– 6.4 MHz) 6: SW3 (W 3.2–10.0 MHz) (N 6.8–7.6 MHz) 7: SW5 (W 5.9–18.0 MHz) (N 9.2–10.0 MHz) 8: SW7 (W 7.0–16.0 MHz) (N 11.45–12.25 MHz) 9: SW9 (W 7.0–23.0 MHz) (N 13.4–14.2 MHz) 10: SW11 (W 9.0–22.0 MHz) (N 15–15.9 MHz) 11: SW13 (W 9.5–18.0 MHz) (N 17.1–18 MHz) 12: SW15 (W 10.0–22.0 MHz) (N 21.2–22 MHz) Note: N = Narrow-band, W = Wideband 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 W/N BAND 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. Radio Mode: Tuner IC works in powerup 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 FM/AM/SW The FM/AM/SW radio parameters that can be configured are listed below in Table 2. 6 Rev. 0.1 Si4844-B-DEMO Table 1. Key Function Description Button/Mode Time Mode Tuner Off POWER/BAND FM/AM/SW Radio Mode Tuner On Hold Time < 1s None Change between FM, AM, and SW (there are 2 FM bands, 2 AM bands, and 8 SW bands) Hold Time > 1s Enable radio Disable radio function and enter Time mode. (Radio parameters will be saved to MCU) None FM mode: Change De-emphasis, between 50 µs and 75 µs. DE/SPC AM mode: Change channel space, between 9 kHz and 10 kHz. BASS/TMR Enter or quit time setting menu. Decrease Bass/Treble level by 1 step. TREBLE/AL Enable or disable the alarm function; enter or quit alarm setting menu. UP/VOL+ Hold Time < 1s Hold Time > 1s DOWN/VOL– Hold Time < 1s Hold Time > 1s MONO/ST W/N BAND Hold Time < 1s Hold Time > 1s SETTING Hold Time < 1s Hold Time > 1s Increase Bass/Treble level by 1 step. In setting menu, change the In radio setting menu, change the current current time/alarm parameter by parameter by one unit per each press. In radio working mode, increase volume 1 one unit per each press. step per each press. In setting menu, change the current time/alarm parameter automatically. In radio setting menu, change the current parameter automatically. In radio working mode, increase volume level automatically until at maximum. In setting menu, change the In radio setting menu, change the current current time/alarm parameter by parameter by one unit per each press. one unit per each press. In radio working mode, decrease volume 1 step per each press. In setting menu, change the current time/alarm parameter automatically. In radio setting menu, change the current parameter automatically. In radio working mode, decrease volume level automatically until at minimum. None FM/SW mode: Change band range between wideband and narrow-band. None FM mode: Change between forced mono audio and ST audio None In radio setting menu, change the current item by one step per each press None Quickly return to FM working mode. Rev. 0.1 7 Si4844-B-DEMO Table 2. Radio Configuration Parameters FM Parameter AM Parameter SW Parameter Bass/Treble: 0-8 Bass/Treble: 1-7 Bass/Treble: 1-7 Default: 4 Default: 3 Default: 3 Digital volume: 0-63 Digital volume: 0-63 Digital volume: 0-63 Default: 63 Default: 63 Default: 63 Band top: max 109 MHz Band top: max 1750 kHz Band top: max 28.5 MHz Default: 108/108 MHz for wide band FM1/FM2 Default: 1710 kHz Default: 7.6/10.0/18.0/16.0/23.0/22.0/18.0/ 22.0 MHz for wide band SW1 to SW8 respectively. Band bottom: min 64 MHz Band bottom: min 504 kHz Band bottom: min 2.3 MHz Default: 87.5 MHz for narrow- Default: 522 kHz band and 64 MHz for wideband. Default: 3.2/3.2/5.9/7.0/7.0/9.0/9.5/10.0 MHz for wideband SW1 to SW8 respectively. De-emphasis: 50 or 75 µs Channel space: 9 or 10 kHz Default: 75 µs Default: 9 kHz TONE/VOL mode: a-d Default: d Tuning preference: a-d Tuning preference: a-d Default: a Default: a Notes: TONE/VOL mode has four modes: 1. Bass/treble mode: no digital volume control, fixed volume level at 59. 2. Digital volume mode: no bass/treble effect, volume levels from 0 to 63. 3. Mixed mode 1: bass/treble & digital volume coexist, volume levels from 0 to 63, scale to 0 ~59. 4. Mixed mode 2: bass/treble & digital volume coexist, volume levels from 0 to 63. The Tuning preference of FM mode has four selections: 1. preference1: When tuning to adjacent channels, allow stereo separation and stereo indicator is on, the volume level decreases by2 dB. 2. preference2: When tuning to adjacent channels, allow stereo separation and stereo indicator is on, the volume level remains unchanged. 3. preference3: When tuning to adjacent channels, disable stereo separation and stereo indicator is off, the volume level decreases by 2 dB. 4. preference4: When tuning to adjacent channels, disable stereo separation and stereo indicator is off, the volume level remains unchanged. The Tuning preference of SW mode has two selections: 1. preference1: When tuning to adjacent channels, the volume level decreases by 2 dB. 2. preference2: When tuning to adjacent channels, the volume level remains unchanged. There is no tuning preference selection for AM mode. 8 Rev. 0.1 Si4844-B-DEMO 4. Operation The S4844-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 two 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 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. Rev. 0.1 9 Si4844-B-DEMO 4.2. FM/AM/SW Radio Mode In Time mode, after a long press (hold time > 1s) of 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, and sleep indicator in case the radio is automatically turned on by the alarm. The demo board display in FM/AM/SW Mode is illustrated in Figure 3. Figure 3. LCD Display in FM Radio Mode The demo board provides two methods for selecting 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 for setting the band property. One is to use the tuner default values. The other method 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 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 via MCU. 3. Hold the POWER/BAND button (hold time > 1s) or when the alarm time is reached, the device will enter FM/AM/SW 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 tuning 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. Note: 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. 10 Rev. 0.1 Si4844-B-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 bottom De-emphasis (only for FM) Channel space (only for AM) The setting menu is illustrated in Figure 4. Band 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 step 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 50 µs or 75 µs. 6. In AM working mode, press the DE/SPC button to set the Channel Space 9 kHz or 10 kHz. SETTING MENU: 1 Band Top 2 Band Bottom 3 TONE/VOL MODE a Bass/Treble MODE 4 Tuning preference b Dig-Vol MODE c MIX MODE1 d MIX MODE2 a preference1 b preference2 c preference3 d preference4 Figure 4. Setting Menu Rev. 0.1 11 Si4844-B-DEMO 4.2.2. MCU Setting Radio Working Mode The host MCU can set the radio working mode. The working modes include: Tone/volume mode (only for FM), item 3 in setting menu Tuning preference (only for FM and SW), item 4 in setting menu Forced mono audio/ST audio (only for FM) Follow these procedures to set radio working mode: 1. Press the SETTING button to enter item 3. The LCD displays the item number st3 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 the item 4. 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. 12 Rev. 0.1 Si4844-B-DEMO 5. Bill of Materials ATDD AM/FM/SW receiver IC Si4844-B with external 32.768 kHz crystal oscillator support LM4910MA audio amplifier IC TM8723 MCU See Table 3 for details Table 3. Si4844-DEMO Board Bill of Materials REV 1.4 Item Qty Reference Description Value 1 12 C1-2 C6 C19 C24 C37-42 C44 CAP,SM,0603,X7R 0.1 µ 2 2 C5 C36 CAP,SM,0603,X7R 0.47 µ 3 2 C8 C10 CAP,SM,0603,COG 100p 4 1 C33 CAP,SM,0603,COG 10p 5 4 C28-29 C32 C35 CAP,SM,0603,COG 22p 6 2 C11 C20 CAP,SM,0603,COG 150p 7 2 C30-31 CAP,SM,0603,X7R 33n 8 1 C34 CAP,SM,0603,COG 33p 9 1 C15 CAP,SM,0603,X7R 4.7 µ 10 4 C4 C7 C12 C21 CAP,SM,0603,X7R 10.0 µ 11 1 C13 CAP,SM,1210,X7R 47 µ 12 2 C18 C22 CAP,SM,0603,COG 330p 13 3 C23 C26 C27 CAP,SM,1210,X7R 220 µ 14 2 C14 C25 Electrolytic capacitor 100 µ/4 V 15 1 C3 Electrolytic capacitor 220 µ/4 V 16 1 R34 RES,SM,0603 100k 17 1 R27 RES,SM,0603 100R 18 2 R5 R6 RES,SM,0603 2k 19 1 R32 RES,SM,0603 10R 20 2 R3 R42 RES,SM,0603 10k 21 1 R41 RES,SM,0603 120k 22 2 R17 R22 RES,SM,0603 12k 23 2 R1-2 RES,SM,0603 1M 24 2 R4 R31 RES,SM,0603 1k 25 1 R24 RES,SM,0603 200R 26 1 R13 RES,SM,0603 22R 27 2 R16 R18 RES,SM,0603 2.2k 28 1 R46 RES,SM,0603 4.7M 29 2 R19 R20 RES,SM,0603 6.8k 30 1 R21 RES,SM,0603 NP 31 1 R7 RES,SM,0603,Tolerance ±1% 10k 1% Rev. 0.1 13 Si4844-B-DEMO Table 3. Si4844-DEMO Board Bill of Materials REV 1.4 (Continued) Item Qty 32 14 Reference Description Value 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 SI4844-B SOIC16 Si4844-B 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 2.5 k/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 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 270 nH 54 2 L3 L4 IND,SM,0603 120 nH 55 2 TP1 TP3 CONN,TH,1x3,HDR CONN,TH,1x3,HDR 56 1 LCD1 LCD LCD 57 1 J1 BNC VERTICAL BNC for FM testing 58 1 J6 SMA VERTICAL SMA for AM testing 59 1 ANT1 AW ferrite stick antenna 220 µH 60 1 BAT1 BATTERY BOX ,AAA*2 SIZE 61 4 S11 S12 S13 S14 One pole two throw switch 62 1 S2 Single pole twelve throw switch 63 9 S1 S3-10 Push button 64 1 VR1 100k,±10%,Variable resistor(POT) 100k 65 1 VR2 10k,±20%,Variable resistor(POT) 10k Rev. 0.1 Rev. 0.1 2.5k/100M B6 LNA_EN [1] R34 100k 33n C30 R41 120k C31 33n R32 10R Q1 2SC9018 10p R31 1k C33 S11 D2 BAV99 C5 3 2 RESET [2] 0.47u 1 12 10k R3 C19 0.1u S12 L2 11 2k R6 C34 33p 270nH [1] FMI 9 C36 0.47u J6 10 AMI GND 13 NC GND 14 8 C13 47u C1 100R R27 0.1u VR1 100k 10% FMI RFGND 6 SDIO 17 SCLK [2] NC [1] BAND 5 SCLK 16 SDIO [2] RST 15 7 18 NC 4 NC XTALO C28 22p 32.768KHz Y1 R46 4.7M 19 XTALI 3 BAND VDD1 20 C6 C15 C29 22p R21 NC 0.1u 4.7u 1 LNA_EN L1 0R/120nH 2 U1 1 3 Si4844 S13 [2] IRQ TP1 C4 10u C7 10u VCC C39 0.1u VCC L4 120nH L3 120nH GND Lout Rout 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 330p C22 330p C18 12k R17 12k R22 R5 2k 4 3 2 1 U2 C11 LM4910MA GND SHUTDOWN IN2 IN1 R20 C20 6k8 R19 150p C25 100u/6.3V VDD VO3 VO2 VO1 150p 6k8 5 6 7 8 C24 0.1u C27 220u C26 220u C23 220u C8 100p C9 100p C10 100p 3 2 1 TP3 B4 2k5/100M B7 2k5/100M B5 2k5/100M Rout GND Lout Figure 5. Si4844-DEMO Board Schematic REV1.4 3 2 1 [1] LNA_EN 10k R42 [2] XTALI [1] TUNE1 VCC 2 TUNE2 VDD2 21 IRQ TUNE1 DBYP 22 ROUT 23 LOUT 24 Test point VCC VCC VR2-A VR2-B MW Test point ANT1 MW ferrite antenna [2] SHUTDOWN VCC J1 B1 D4 BAV99 1 2 3 NC FM/SW [1] FMI Audio output J5 BAND [1] 2-1 push button 2-3 slide switch S14 2 S14: Band Selection 3 1 VCC 1 S2 2 3 4 5 6 7 8 9 10 11 12 13 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 (W 64MHz - 108MHz ) (N 87MHz - 108MHz) FM5 (W 76MHz - 108MHz) (N 64MHz - 87MHz) AM1 (520kHz - 1710kHz) AM2 (522kHz - 1620kHz) SW1 (W 3.2MHz - 7.6MHz) (N 5.6MHz - 6.4MHz) SW3 (W 3.2MHz - 10.0MHz) (N 6.8MHz - 7.6MHz) SW5 (W 5.9MHz - 18.0MHz) (N 9.2MHz - 10.0MHz) SW7 (W 7.0MHz - 16.0MHz) (N 11.45MHz - 12.25MHz) SW9 (W 7.0MHz - 23.0MHz) (N 13.4MHz - 14.2MHz) SW11 (W 9.0MHz - 22.0MHz) (N 15MHz - 15.9MHz) SW13 (W 9.5MHz - 18.0MHz) (N 17.1MHz - 18MHz) SW15 (W 10.0MHz - 22.0MHz) (N 21.2MHz - 22MHz) (Note: W= Wide Band, N=Narrow Band) (Note: Wide band only valid under MCU setting mode) TUNE1 [1] Si4844-B-DEMO 6. Schematics 15 Rev. 0.1 [2] [2] [2] [2] [2] [2] KEY_C0 KEY_C1 KEY_C2 KEY_C3 KEY_R0 KEY_R1 XTALI [1] Y2 32.768KHz C42 0.1u RESET VCC C40 0.1u LCD_C1 [2] LCD_C2 [2] C37 0.1u VCC C35 22p C32 22p VCC S1 R1 1M 11 10 9 8 7 6 5 4 3 2 1 SETTING S10 W=Wide, N=Narrow KEY TREBLE/AL S6 BASS/TMR S5 DE/SPC MONO/ST W/N Band S9 DOWN/VOL- POWER/BAND S3 [2] KEY_C1 [2] KEY_C2 MCU S4 COM2 COM1 CUP2 CUP1 VDD3 VDD2 VDD1 GND XOUT XIN BAK U3 IRQ [1] Q3 2N3906 S8 UP/VOL+ S7 C38 0.1u C44 0.1u R2 1M 44 TEST 43 INT COM4 13 COM3 12 [2] LCD_C3 42 RESET COM5 14 [2] KEY_C3 15 [2] KEY_C0 38 SEG33/IOC2/KI2 41 SEG35/IOC4/KI4 SEG1(K1) 39 SEG32/IOC1/KI1 SEG4(K4) SEG3(K3) 40 SEG34/IOC3/KI3 SEG2(K2) 16 [2] [2] 18 [2] LCD_S1 17 [2] LCD_S0 KEY_R1 KEY_R0 [2] BZ 36 SEG30/IOB3/BZB SEG6(K6) [1] SHUTDOWN 35 SEG29/IOB2/ELP SEG7(K7) R24 23 24 25 26 27 28 29 30 31 32 VCC [1] SCLK LCD_S6 LCD_S7 LCD_S8 LCD_S9 LCD_S10 LCD_S11 LCD_S12 SDIO RESET a preference1 b preference2 c preference3 d preference4 a Bass/Treble MODE b Dig-Vol MODE c MIX MODE1 d MIX MODE2 [2] [2] [2] [2] [2] [2] [2] [1] [1] BZ [2] C2 0.1u 1k R4 C3 220u/4V Q2 2N3904 BZ1 BUZZER D6 1N4148 R13 22R VCC Figure 6. Si4844-DEMO Board Schematic REV1.4 1 Band Top 2 Band Bottom 3 Tone/Vol MODE 4 Tuning Preference SETTING MENU: SEG9(K9) SEG10(K10) SEG11(K11) SEG12(K12) SEG21 SEG22 SEG23 SEG24/IOA1 SEG25/IOA2 SEG26/IOA3 33 200R SEG27/IOA4 D1 Tuning indicator [2] LCD_S13 34 SEG28/IOB1/ELC SEG8(K8) 37 SEG31/IOB4/BZ SEG5(K5) 19 [2] 21 [2] 22 [2] LCD_S5 20 [2] LCD_S3 LCD_S2 [2] LCD_C1 1 COM1 [2] LCD_C2 [2] LCD_S1 FM MW SW 2 COM2 [2] LCD_C3 3 COM3 [2] LCD_S0 4 SEG0 [2] LCD_S2 6 SEG2 5 SEG1 [2] LCD_S3 7 SEG3 [2] LCD_S4 8 SEG4 [2] LCD_S5 9 LCD SEG5 [2] LCD_S6 10 SEG6 [2] LCD_S7 11 SEG7 [2] LCD_S8 [2] LCD_S10 SLEEP 12 SEG8 [2] LCD_S9 13 SEG9 [2] LCD_S11 15 [2] LCD_S12 MHz KHz MHz PM SEG11 14 SEG10 [2] LCD_S13 17 SEG13 16 SEG12 16 LCD_S4 C41 0.1u LCD1 Si4844-B-DEMO Figure 7. Si4844-DEMO Board Gerber REV1.4 Si4844-B-DEMO Rev. 0.1 17 Smart. Connected. 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