Si4822-26-DEMO User's Guide
Si4822/26-DEMO
Si4822/26 D EMO B OA RD 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
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 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 28.5 MHz with 16 default sub-bands:
SW1
5.6–6.4 MHz (Demo Board Default, for Si4826 only)
SW2 5.95–6.2 MHz
SW3 6.8–7.6 MHz (Demo Board Default, for Si4826 only)
SW4 7.1–7.6 MHz
SW5 9.2–10 MHz (Demo Board Default, for Si4826 only)
SW6 9.2–9.9 MHz
SW7 11.45–12.25 MHz (Demo Board Default, for Si4826 only)
SW8 11.6–12.2 MHz
SW9 13.4–14.2 MHz (Demo Board Default, for Si4826 only)
SW10 13.57–13.87 MHz
SW11 15–15.9 MHz (Demo Board Default, for Si4826 only)
SW12 15.1–15.8 MHz
SW13 17.1–18 MHz (Demo Board Default, for Si4826 only)
SW14 17.48–17.9 MHz
SW15 21.2–22 MHz (Demo Board Default, for Si4826 only)
SW16 21.45–21.85 MHz
Twelve
positions band switch or one push button for selecting different band 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 interface
The frequency range of each band, de-emphasis and AM channel space can be re-configured by host
MCU.
Rev. 0.1 11/11
Copyright © 2016 by Silicon Laboratories
Si4822/26-DEMO
Si4822/26-DEMO
2. Overview
This manual describes the operation of the Silicon Labs Si4822/26-DEMO Board Rev1.0, October 24, 2011. The
Silicon Laboratories Si4822/26-DEMO Board is designed with the 24-pin SSOP-packaged Si4822/26 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 Si4822/26DEMO 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.
2
Rev. 0.1
Si4822/26-DEMO
3. Description
Figure 1 and Figure 2 shows the physical layout of the board with key components indicated.
Figure 1. Si4822/26-DEMO Board Top Side in Time Mode
Figure 2. Si4822/26-DEMO Board Bottom Side
Rev. 0.1
3
Si4822/26-DEMO
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 testing
S11: AM antenna selector
1-2: SMA for AM Conductive Test
2-3: AM Ferrite Antenna
1
2
3
J1: BNC connector for FM/ SW conductive testing or FM whip antenna
S12: FM antenna selector
1
2
1-2: BNC (J1)
2-3: HP ANT (J5)
3
Radio Band Selection:
The demo board provides two methods for selecting the radio band: one is to use the slide switch S2, another is to
use the POWER/BAND button. S14 determines which method is in use.
S14:
1
2
1-2: Use slide switch to select band
2-3: Use push button to select band
3
4
Rev. 0.1
Si4822/26-DEMO
Radio Band Property Setting:
S13:
1
2
1-2: Use the keypad to set the band propery via MCU
2-3: Use the tuner default band setting values
3
Audio Output Test Point:
For the 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.
1
GND
2
AOUT
Main Components:
U1: Silicon Laboratories Si4822/26 AM/FM/SW ATDD receiver
U2: Audio amplifier
U3: MCU
LCD: The digital display of tuning frequency
Rev. 0.1
5
Si4822/26-DEMO
Control Interface:
VR1: Frequency tuning wheel
VR2: Volume control wheel
S3~S8, S10: The keypad
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 µs
2: FM5 (64–87 MHz), De-emphasis = 75 µs
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)
Human Interface:
There are seven keys for controlling the demo board as shown below:
TREBLE/AL
BASS/TMR
DE/SPC
SETTING
DOWN/VOL-
UP/VOL+
POWER/BAND
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 that can be configured
are listed in Table 2.
6
Rev. 0.1
Si4822/26-DEMO
Table 1. Key Function Description
Button/Mode
POWER/BAND
Time Mode
Tuner Off
FM/AM/SW Radio Mode
Tuner On
hold Time
< 1s
None
Change between FM, AM, and SW (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).
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+
DOWN/VOL-
SETTING
Increase Bass/treble level by 1 step.
hold Time < In setting menu, change the
1s
current time/alarm parameter
by one unit per each press.
In radio setting menu, change the current
parameter by one unit per each press.
In radio working mode, increase volume 1
step per each press.
hold Time
> 1s
In radio setting menu, change the current
parameter automatically.
In radio working mode, increase volume
level automatically until to maximum.
In setting menu, change the
current time/alarm parameter
automatically.
hold Time < In setting menu, change the
1s
current time/alarm parameter
by one unit per each press.
In radio setting menu, change the current
parameter by one unit per each press.
In radio working mode, decrease volume 1
step per each press.
hold Time
> 1s
In radio setting menu, change the current
parameter automatically.
In radio working mode, decrease volume
level automatically until to minimum.
In setting menu, change the
current time/alarm parameter
automatically.
hold Time < None
1s
In radio setting menu, change the selected
item per each press.
hold Time
> 1s
Quickly return to FM working mode.
None
Rev. 0.1
7
Si4822/26-DEMO
Table 2. Radio Configuration Parameters
FM Parameter
AM Parameter
SW 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: 6.4/7.6/10/12.25/14.2/15.9/18/22 MHz
for SW1 to SW8 respectively
Band bottom: min 64 MHz
Default: 87.5 MHz
Band bottom: min 504 kHz
Default: 522 kHz
Band bottom: min 2.3 MHz
Default: 5.6/6.8/9.2/11.45/13.4/15/17.121.2 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 µs
Channel space: 9 or 10 kHz
Default: 9 kHz
Tone/VOL mode: a-d
Default: d
Tuning preference: a-d
Default: b
Notes:
Tone/VOL mode has four 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 has two selections:
Preference1: When tuning to adjacent channels, the volume level decreases by 2 dB
Preference2: When tuning to adjacent channels, the volume level remains unchanged
The Tuning preference of SW has two selections:
Preference1: When tuning to adjacent channels, the volume level decreases by 2 dB
Preference2: When tuning to adjacent channels, the volume level remains unchanged
There is no tuning preference selection for AM mode.
8
Rev. 0.1
Si4822/26-DEMO
4. Operation
The Si4822/26-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
Place 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 BASS/TMR button to quit the setting menu. The MCU will
automatically quit 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 to 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. Pressing this button again will 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 TREBLE/AL button to quit the set menu. The MCU will
automatically quit 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 push buttons within 15 minutes; if there is any operation on the push buttons, the autosleep function will be disabled. The radio keeps working throughout this time.
Rev. 0.1
9
Si4822/26-DEMO
4.2. FM/AM/SW Radio Mode
In time mode, the device will enter FM/AM/SW mode after a long press (hold time > 1s) of the POWER/BAND
button or when the alarm time is reached. 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 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 tuner default values, the other
is to use the keypad to reconfigure 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 re-configured. 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 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.
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.
10
Rev. 0.1
Si4822/26-DEMO
4.2.1. MCU Setting Band Property
The demo board provides the function that the band property can be set by the 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 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.
S E T T IN G M E N U :
1 BAND TO P
2 BAND BO TTO M
3 T O N E /V O L M O D E
a B a s s /T re b le M O D E
4 T u n in g p re fe re n c e
b D ig -V o l M O D E
c M IX M O D E 1
d M IX M O D E 2
a p re fe re n c e 1
b p re fe re n c e 2
Figure 4. Setting Menu
Rev. 0.1
11
Si4822/26-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 3 in setting menu
preference (only for FM and SW), item 4 in setting menu
To set radio working mode, follow these steps:
Tuning
1. Press the SETTING button to enter the 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 step 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.
12
Rev. 0.1
Si4822/26-DEMO
5. Bill of Materials
ATDD
AM/FM/SW receiver IC Si4822/26 with external 32.768 kHz crystal oscillator support
LM4910MA Audio amplifier IC
TM8795 MCU
See Table 3 for details
Table 3. Si4822/26-DEMO Board Bill of Materials Rev 1.0
Item
Qty
Reference
Description
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 10
CAP,SM,0603,COG
100 p
4
1
C33
CAP,SM,0603,COG
10 p
5
4
C28-29 C32 C35
CAP,SM,0603,COG
22 p
6
1
C11
CAP,SM,0603,X7R
330 p
7
2
C30-31
CAP,SM,0603,X7R
33 n
8
1
C34
CAP,SM,0603,COG
33 p
9
1
C15
CAP,SM,0603,X7R
4.7 µ
10
2
C4 C12
CAP,SM,0603,X7R
10 µ
11
1
C13
CAP,SM,1210,X7R
47 µ
12
1
C18
CAP,SM,0603,X7R
820 p
13
2
C23 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
2
R5-6
RES,SM,0603
2k
17
1
R27
RES,SM,0603
100 R
18
1
R34
RES,SM,0603
100 k
19
1
R32
RES,SM,0603
10 R
20
2
R3 R42
RES,SM,0603
10 k
21
1
R41
RES,SM,0603
120 k
22
1
R22
RES,SM,0603
12 k
23
2
R1-2
RES,SM,0603
1M
24
2
R4 R31
RES,SM,0603
1k
25
1
R24
RES,SM,0603
200 R
26
1
R13
RES,SM,0603
22 R
27
1
R16
RES,SM,0603
2.2 k
28
1
R20
RES,SM,0603
6.8 k
29
1
R21
RES,SM,0603
NP
30
1
R7
RES,SM,0603,Tolerance ±1%
10 k 1%
31
1
R29
RES,SM,0603,Tolerance ±1%
160 k 1%
Rev. 0.1
Value
13
Si4822/26-DEMO
Table 3. Si4822/26-DEMO Board Bill of Materials Rev 1.0 (Continued)
Item
Qty
32
9
R9-12 R14-15 R28 R33 R35
RES,SM,0603,Tolerance ±1%
20 k 1%
33
1
R43
RES,SM,0603,Tolerance ±1%
30 k 1%
34
1
R36
RES,SM,0603,Tolerance ±1%
33 k 1%
35
1
R8
RES,SM,0603,Tolerance ±1%
40 k 1%
36
1
R44
RES,SM,0603,Tolerance ±1%
47 k 1%
37
1
U1
SI4822/26 SSOP24
38
1
U2
LM4910MA,SO8
LM4910MA
39
1
U3
TM8795 44 PIN
TM8795 44 PIN
40
1
Q2
TRANSISTOR NPN SOT23
2N3904
41
1
Q1
TRANSISTOR NPN SOT23
2SC9018
42
1
Q3
TRANSISTOR NPN SOT23
2N3906
43
2
D2 D4
DIODE,SM,ESD,SOT23
BAV99
44
3
B4 B5 B6
FERRITE BEAD,SM,0603
2.5 k/100 M
45
1
B1
FERRITE BEAD,SM,0603
NP
46
1
BZ1
BUZZER
BUZZER
47
2
Y1-2
CRYSTAL
32.768 kHz
48
1
D1
LED
49
1
D6
1N4148
1N4148
50
1
J5
Stereo earphone jack with switch
3.5 mm
51
1
L1
RES,SM,0603
0R
52
1
L3
IND,SM,0603
120 nH
53
1
TP3
CONN,TH,1x2,HDR
54
1
LCD1
LCD
55
1
J1
BNC VERTICAL
BNC for FM testing
56
1
J6
SMA VERTICAL
SMA for AM testing
57
1
ANT1
AW ferrite stick antenna
58
1
BAT1
BATTERY BOX ,AAA*2 SIZE
59
4
S11-14
One pole two throw switch
60
1
S2
Single pole twelve throw switch
61
8
S1 S3-8 S10
Push button
62
1
VR1
100 k, ±10%,Variable resistor(POT)
100 k
63
1
VR2
10k,±20%,Variable resistor(POT)
10 k
14
Reference
Description
Value
Si4822/26
LED
CONN,TH,1x2,HDR
LCD
Rev. 0.1
220 µH
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
D2
BAV99
RESET [2]
0.47u
C5
J6
12
Rev. 0.1
11
2k
R6
C34
33p
47u
C13
100R
R27
0.1u
C1
VR1
100k 10%
C28
22p
32.768KHz
Y1
C15
C29
22p
R21
NC
0.1u 4.7u
C6
2
U1
1
3
[2]
IRQ
[1] LNA_EN
10k
R42
[2] XTALI
TP1
Si4822/26-A
S13
[1] TUNE1
VCC
C4
10u
C39
0.1u
VCC
L3
120nH
C14
100u/4V
10u
C12
2-1 MCU Setting
2-3 Tuner default
S13: Band property
BAT1
AAA*2
R16
2k2
820p
C18
12k
R22
R5
2k
4
3
2
1
U2
C11
LM4910MA
GND
SHUTDOWN
IN2
IN1
R20
C25
100u/6.3V
VDD
VO3
VO2
VO1
330p
6k8
5
6
7
8
C24
0.1u
C27
220u
C23
220u
C10
100p
Aout
GND
C8
100p
B4 2k5/100M
B5 2k5/100M
Test point
TP3
NC
B1
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. Si4822/26-DEMO Board Rev 1.0 Schematic—Radio and Audio Portions
10k
R3
C19
0.1u
S12
[1] FMI
9
L1
0R/120nH
2
IRQ
C36
0.47u
MW
VCC
10
AMI
GND
13
NC
GND
14
NC
8
FMI
RFGND
7
SDIO
17
SCLK [2]
RST
15
6
SCLK
16
SDIO [2]
1
LNA_EN
[1] BAND
5
NC
18
XTALO
4
NC
19
XTALI
3
BAND
VDD1
20
TUNE2
VDD2
21
TUNE1
DBYP
22
NC
23
AOUT
24
ANT1
MW ferrite antenna
VCC
J1
VR2-A
D4
BAV99
[2]
SHUTDOWN
VCC
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)
Si4822/26-DEMO
6. Schematics and Gerber
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
S7
11
10
9
8
7
6
5
4
3
2
1
S3
S10
DE/SPC
DOWN/VOL-
KEY
TREBLE/AL
S6
BASS/TMR
R24
[1] SHUTDOWN
[2] LCD_S13
23
24
25
26
27
28
29
30
31
32
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
[1]
[2]
[2]
[2]
[2]
[2]
[2]
[2]
[1]
[1]
SCLK
a preference1
b preference2
a Bass/Treble MODE
b Dig-Vol MODE
c MIX MODE1
d MIX MODE2
LCD_S6
LCD_S7
LCD_S8
LCD_S9
LCD_S10
LCD_S11
LCD_S12
SDIO
RESET
BZ
[2]
C2
0.1u
1k
R4
C3
220u/4V
Q2
2N3904
BZ1
BUZZER
D6
1N4148
R13
22R
VCC
[2] LCD_S2
[2] LCD_S1
FM
MW SW
[2] LCD_S5
[2] LCD_S4
[2] LCD_S3
VCC
[2] KEY_C0
LCD
Figure 6. Si4822/26-DEMO Board Gerber Rev 1.0 Schematic—MCU Portion
SETTING
[2] KEY_C3
POWER/BAND
S5
[2] KEY_C1
MCU
S4
COM2
COM1
CUP2
CUP1
VDD3
VDD2
VDD1
GND
XOUT
XIN
BAK
U3
IRQ [1]
Q3
2N3906
S8
UP/VOL+
C38
0.1u
C44
0.1u
R2
1M
12
[2] KEY_C2
[2]
37
R1
1M
44
TEST
43
13
COM3
42
INT
COM4
14
RESET
COM5
LCD_C3
15
40
SEG34/IOC3/KI3
41
SEG35/IOC4/KI4
SEG1(K1)
38
SEG32/IOC1/KI1
SEG4(K4)
39
SEG33/IOC2/KI2
SEG3(K3)
17
SEG2(K2)
[2]
18
[2]
LCD_S0
19
[2]
LCD_S1
16
[2]
KEY_R1
KEY_R0
[2] BZ
SEG31/IOB4/BZ
SEG5(K5)
35
SEG29/IOB2/ELP
SEG7(K7)
34
SEG28/IOB1/ELC
SEG8(K8)
36
SEG30/IOB3/BZB
SEG6(K6)
[2]
21
[2]
22
[2]
LCD_S5
20
[2]
LCD_S3
LCD_S2
[2] LCD_C1
1
COM1
[2] LCD_C2
2
COM2
[2] LCD_C3
3
COM3
[2] LCD_S0
4
SEG0
5
SEG1
6
SEG2
7
SEG3
8
SEG4
9
SEG5
[2] LCD_S6
10
SEG6
[2] LCD_S7
11
SEG7
[2] LCD_S8
APPD
DRAWN
MODEL NO
SLEEP
12
SEG8
[2] LCD_S9
13
SEG9
[2] LCD_S10
14
SEG10
[2] LCD_S11
15
[2] LCD_S12
LCD1
DATE
DATE
DIVISION
SI4822/26-DEMO
Jing Wang
MHz
KHz
MHz
PM
SEG11
[2] LCD_S13
17
SEG13
16
SEG12
16
LCD_S4
C41
0.1u
October.24.20
Si4822/26-DEMO
Figure 7. Si4822/26-DEMO Board Gerber Rev 1.0
Si4822/26-DEMO
Rev. 0.1
17
Smart.
Connected.
Energy-Friendly
Products
Quality
Support and Community
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Disclaimer
Silicon Laboratories intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers
using or intending to use the Silicon Laboratories products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific
device, and "Typical" parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Laboratories
reserves the right to make changes without further notice and limitation to product information, specifications, and descriptions herein, and does not give warranties as to the accuracy
or completeness of the included information. Silicon Laboratories shall have no liability for the consequences of use of the information supplied herein. This document does not imply
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