20
ESP32-LyraTD-SYNA User Guide Version 1.1 Espressif Systems Copyright © 2019
ESP32-LyraTD-SYNA User Guide
Version 1.1 Espressif Systems Copyright © 2019
About This Guide This document helps you to get started with the ESP32-LyraTD-SYNA development board.
Release Notes
Documentation Change Notification Espressif provides email notifications to keep customers updated on changes to technical documentation. Please subscribe at https://www.espressif.com/en/subscribe.
Certification Download certificates for Espressif products from https://www.espressif.com/en/certificates.
Date Version Release notes
2019.09 V1.0 Initial release.
2019.10 V1.1 Updated module figure in Chapter 1.1.
Table of Contents 1. Overview 1 ................................................................................................................................
1.1. ESP32-LyraTD-SYNA 1.................................................................................................................1.2. Hardware Resources 1..................................................................................................................
2. Configuring for AVS 3 ...............................................................................................................2.1. Software Preparation 3.................................................................................................................2.2. Hardware Preparation 3................................................................................................................2.3. Flashing the Firmware 4................................................................................................................
2.3.1. Driver Installation 4..........................................................................................................2.3.2. Flashing ESP32 4.............................................................................................................
2.4. Network Configuration 7...............................................................................................................2.4.1. Wi-Fi Networking 7..........................................................................................................
2.5. Interactive Function 10..................................................................................................................2.5.1. Voice Recognition 10.......................................................................................................2.5.2. Buttons 10.......................................................................................................................
A. Appendix - Schematics 11.......................................................................................................
!
1.Overview
1. Overview ESP32-LyraTD-SYNA is one of Espressif’s Audio Development Board based on ESP32 MCU and Synaptics DSP. It is an Acoustic Echo Cancelation (AEC) solution, supporting voice recognition and voice wake-up. Audio files in the format of WAV, MP3, AAC, FLAC, OPUS and OGG can be decoded and encoded without quality loss. It also supports connection to Amazon’s AVS (Alexa Voice Service), Google's Dialogflow and Google's GVA (Google Voice Assistant).
1.1. ESP32-LyraTD-SYNA ESP32-LyraTD-SYNA is based on ESP32-WROVER-B, a BT/Wi-Fi combo module, and a digital signal processor (DSP) that features a two-microphone array for noise reduction and echo cancelation, as well as a Coder-Decoder (CODEC) that includes two pairs of DACs & ADCs with high sampling rates.
! Figure 1-1. ESP32-LyraTD-SYNA
1.2. Hardware Resources 1. USB Power Port
Provides power supply to the whole system. It is recommended that the system be connected to a power adapter for sufficient current supply.
2. ESP32-WROVER-B module This is a powerful, general-purpose, Wi-Fi+BT+BLE dual core MCU module, targeting a wide variety of applications ranging from low-power sensor networks to the most demanding tasks, such as voice encoding/decoding, music streaming and runs voice assistant client SDK.
3. CX20921 DSP CX20921 is a dual core, far field voice input processor which supports Smart Source Pickup(SSP) noise suppression and various functionalities such as voice control, voice search, Voice over Internet Protocol (VOlP) and acoustic echo cancellation (AEC). This
Espressif ! /171 2019.10
!
1.Overview
audio DSP is used for wake-word detection. It captures audio data from two external microphones.
4. CX20721 codec CX20721 is an audio Coder-Decoder which has integrated AudioSmart Class-D with 2.8W per channel.
5. CP2102N USB-UART Chip An upgraded version of the CP2102 chip supports USB-to-UART conversion.
6. USB Communication Port This is a normal USB communication port between PC and ESP32 module.
7. ON-Board microphone There are two types of microphone connection, on-board and by MIC-IN connector.
8. MIC-IN microphone connector Supports two external microphones.
9. FPC connector This connection is reserved for connecting external sub board consisting of more devices, such as microphone array, buttons and LEDs etc.
10. Earphone jack Used for plugging in earphones. Audio output is via codec.
11. Speaker output port Supports two external speakers output via codec.
12. Button The six buttons figure different functions, such as RST, BOOT, PLAY, VOL+/-, MUTE etc.
⚠ Notice:
The IC design of this chip is a little different from CP2102.
Espressif ! /172 2019.10
!
2. Configuring for AVS
2. Configuring for AVS 2.1. Software Preparation
1. Installing Flash Download Tool Linux/macOS/Windows users can use the terminal to flash firmware. For more details, please check ESP-IDF Programming Guide.
Windows users may also use a graphical tool to flash firmware onto the board using the Flash Download Tool.
2. Downloading Firmware Please follow the build instructions of the Alexa SDK from the Github page: https://github.com/espressif/esp-va-sdk.
3. Debugging Tool
Use serial monitor/console that suits your development environment at baud rate of 115200.
4. App for Provisioning In order to run Alexa you need to provision LyraTD-SYNA with Alexa credentials and network settings (Wi-Fi SSID and passphrase).
• Android APK: https://play.google.com/store/apps/details?id=com.espressif.provbleavs
• iOS: https://apps.apple.com/us/app/esp-alexa/id1464127534
2.2. Hardware Preparation • 1 x PC (Linux Operating System is recommended).
• 1 x ESP32-LyraTD-SYNA.
• 2 x Micro USB cables (one is for the USB power supply).
• 1 x Speaker or 1 x earphone.
⚠ Notice:
The GitHub repository uses Espressif’s wake-word engine (WWE) for processing the ‘Alexa’ wake-word. This allows easy evaluations. For production use cases, please reach out to [email protected] or your Synaptics sales representative to obtain an Amazon certified wake-word engine.
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!
2. Configuring for AVS
2.3. Flashing the Firmware This document captures the process of flashing the firmware on Windows. Please refer to the ESP-VA-SDK repository on Github for setup on other platforms.
2.3.1. Driver Installation
Connect the board to a PC with a Micro-USB cable and install the USB-to-UART driver.
2.3.2. Flashing ESP32
! Figure 2-1. Flash Download Tool
• In order to build examples of esp-va-sdk, please follow the instructions mentioned on the GitHub page.
• Once you build the Alexa firmware, you will generate three artifacts: bootloader.bin, partitions.bin and alexa.bin.
• For Flash Download Tool users, follow the instructions given below.
1. Run Flash Download Tool, and click on “ESP32 Download Tool” at the interface. See Figure 2-1 above.
2. Then you will see the interface shown in Figure 2-2 below.
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!
2. Configuring for AVS
! Figure 2-2. ESP32 Download Tool
3. Select the binary files (mentioned in table below) and set appropriate address in the tool as shown in Figure 2-3.
Binary Files Address Function
bootloader.bin 0x1000 basic configuration
partitions.bin 0x8000 basic configuration
alexa.bin 0x10000 audio application
Espressif ! /175 2019.10
!
2. Configuring for AVS
! Figure 2-3. Flashing Configuration
4. The SPI Download configuration on the ESP32 Download Tool is shown in Figure 2-3. Select “80 MHz” for “SPI SPEED”; select “DIO” for “SPI MODE”; and select “128 Mbit” for “FLASH SIZE”.
5. Select the COM port in line with the one used by the PC; select “1152000” as a baud rate.
6. Click the “START” button on the ESP32 Flash Download Tool to start downloading the firmware.
7. Wait for the download to finish. See Figure 2-4.
! Figure 2-4. Downloading Firmware
Espressif ! /176 2019.10
!
2. Configuring for AVS
2.4. Network Configuration 2.4.1. Wi-Fi Networking
1. After successfully downloading the firmware, power on the board again by pressing the EN button.
2. To configure the network for the first time:
• Turn on the bluetooth in your phone. Open Espressif’s Alexa programming app and click on Provision New Device. Make sure your phone has internet connectivity.
! Figure 2-5. Provision New Device
• The provisioning happens over BLE (Bluetooth Low Energy). Android mandates applications to have Location permission for accessing BLE. Please provide the permission when the pop-up shows up.
• You will see the list of available devices that needs to be provisioned, namely ESP-Alexa-WXYZ. Select the device that you wish to provision.
📖 Note: Terminal users can follow the flashing instructions as available on the GitHub page.
Espressif ! /177 2019.10
!
2. Configuring for AVS
! Figure 2-6. List of available devices
• Next step is to login to your amazon account.
! Figure 2-7. Login to your amazon
• After successful login and authorization, you will be shown a list of Wi-Fi networks in the vicinity. Choose the network that you wish the device to connect to. Once
Espressif ! /178 2019.10
!
2. Configuring for AVS
selected, enter the passphrase of that Wi-Fi network and click on the provision button.
! Figure 2-8. Available Wi-Fi networks
! Figure 2-9. Enter your passphrase
• On successfully connecting to the Wi-Fi network, after provisioning, the DSP and Alexa will be initialized, and ready to take voice commands.
Espressif ! /179 2019.10
!
2. Configuring for AVS
2.5. Interactive Function 2.5.1. Voice Recognition
• Once all initialization are done, the device is ready. You can either use "PLAY" button on the board (Tap-To-Talk) or say "Alexa" to start a conversation. For Tap-to-Talk, press and release the button and speak.
• You can now ask any command like: - Tell me a joke. - How is the weather? - Will it rain today? - Sing a song. - Play TuneIn radio. - Set volume level to 7.
2.5.2. Buttons
• The “PLAY” button can be used as tap-to-talk. The same button can also be used to disable an Alarm/Timer.
• The “Vol+” and “Vol-” buttons can be used to adjust the volume of the sound. Press them repeatedly until you reach the desired sound volume.
• The "Mute" button can be used to mute/unmute the device.
• To reset to factory settings, press "Vol+" and "Vol-" button together for about 10 seconds.
Espressif ! /1710 2019.10
!
Appendix A
A. Appendix - Schematics
!
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
ESP3
2
Powe
r Bloc
k:
Syst
em B
lock:
DSP
CX20
921
Code
cCX
2272
1
MIC*
2
Keys
SPK*
2
EN K
eyRS
T
BOOT
Key
BOOT
USB
to UART
TX/R
XUS
BCN
ND+
/D-
Key*
4
CNN(
Rese
rved
fo
r LE
D,Ke
y,MI
C)I2
C&AD
C
MIC
OUT+
/-
INT+
RST+
I2C
+I2S
_CX_
TX
IRQ+
EAPD
+I2C
+I2S
_ESP
_TX
I2S_
AEC
VCC
AP73
61C-
33-E
R-7/
13
USB
CNN
ESP3
23.
3V
LDO
3.3V
DSP
CX20
921
3.3V
Code
cCX
2272
1
LDO
LDO
1.8V
VCC
Title
Siz
eD
ocum
ent
Num
ber
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ent
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Espressif ! /!11 17 2019.10
!
Appendix A
!
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
ESP3
2 Mo
dule
:Button A
rray
USB<
->UA
RT:
JTAG
MTDI
MTCK
MTMS
MTDO
UART
I2C
I2C:
SCL
I2C:
SDA
I2S
Auto
mati
c &
Butt
on D
ownl
oad:
A
uto
prog
ram
DTR
R
TS--
>
EN
_Aut
o
IO0_
IO2_
Aut
o
1
1
1
1
0
0
1
1
1
0
0
1
0
1
1
0
DSP
GPIO
DSP_I2S_LRCK :
IO32
Codec_SPK_MU
TE:I
O22
PJ_DET:I
O21
Codec_I2S_
BCLK
:IO5
Codec_I2S_
FS:I
O25
Codec_I2S_SD
I0:I
O26
Codec_I2S_MC
LK:I
O0
Codec_EA
PD:I
O4
DSP_I2S_DO :
IO35
DSP_I2S_BCLK :
IO33
DSP
RESET
: IO19
I2C_SCL:
IO23
I2C_SDA:
IO18
MUTE_ON_OF
F:IO
27
USB:
3.3V
/800
mA
Powe
r Su
pply
for
ESP
32:
EN SEN
SOR
_VP
SEN
SOR
_VN
_AD
CIO
34IO
35IO
32IO
33IO
25IO
26IO
27IO
14
3V3
IO13
DG
ND
IO22
TXD
0R
XD0
IO21
IO19
IO18
IO4
IO0
IO5
IO23
Mod
ule_
NC
IO15
IO2
DG
ND
SHD
/SD
2SW
P/S
D3
SCS/
CM
DSC
K/C
LKSD
O/S
D0
SDI/S
D1
IO17
_NC
IO16
_NC
DG
ND
IO12
IO12
IO13
IO14
IO15
TXD
0R
XD0
IO23
IO18
IO35
IO32
IO33
IO0
IO5
IO25
IO26
IO23
IO18
Mod
ule_
NC
3V3 IO
26IO
27
IO34
IO22
DG
ND
IO12
IO17
_NC
IO16
_NC
DG
ND
IO19
IO25
IO2
EN SEN
SOR
_VP
SEN
SOR
_VN
_AD
C
IO35
IO32
IO33
IO14
IO23
TXD
0R
XD0
IO21
IO18
IO4
IO0
DGNDIO13SHD/SD2SWP/SD3SCS/CMDSCK/CLKSDO/SD0SDI/SD1IO15
IO5
SEN
SOR
_VN
IO18
IO33
IO32
SEN
SOR
_VP
IO22 IO21
IO5
IO25
IO26
IO0
IO4
IO35
IO19
IO23
IO27
D-
D+
USB
_DP
USB
_DN
REG
IN
TXD
RXD
0
USB
_DN
RST#
ACTIVE
TXD
0
USB
_DP
DTR
RTS
IO0_
IO2_
Aut
o
IO0_
IO2_
KEY
IO2
IO0
ENEN
_KEY
EN_A
uto
DTR
RTS
EN_A
uto
IO0_
IO2_
Aut
o
EN
SEN
SOR
_VN
SEN
SOR
_VN
_AD
C
DG
ND
GN
D
DG
ND
VDD
33
DG
ND
VDD
33
VDD
33
DG
ND
GN
DG
ND
GN
D
GN
D
VUSB
GN
D
VBU
S0VU
SB
GN
D
GN
D
GN
D
VBU
S0
GN
D
GN
D
VDD
33
GN
D
VDD
33
VCC
GN
DG
ND
VUSB
GN
D
VCC
GN
DG
ND
GN
D
VDD
33
VDD
33
GN
D
GN
D
VDD
33
DG
ND
VDD
33
DG
ND
SEN
SOR
_VN
3
IO18
3,5,
6
IO33
5IO
325
CX_
GPI
O_1
5
IO23
3,5,
6
IO22
6
IO21
6
IO5
6IO
256
IO26
6
IO0
6
IO4
6
IO35
5
IO19
5
IO27
3,5
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<02_
Pow
er_M
CU
>1.
3
ES
P32
-LY
RA
TD-S
YN
A
C
26
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<02_
Pow
er_M
CU
>1.
3
ES
P32
-LY
RA
TD-S
YN
A
C
26
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<02_
Pow
er_M
CU
>1.
3
ES
P32
-LY
RA
TD-S
YN
A
C
26
Frid
ay, A
ugus
t 30,
201
9
R36
100K
(1%
)(N
C)
R23
00R
(5%
)
R21
0R(5
%)
U4
AP73
61C
-33-
ER-7
/13
GND1
VO
UT
2V
IN3
Tab
4
C16
0.1u
F/16
V(1
0%)
TP59
1
J12
USB
_CO
N8
VB
US
1
D-
2
D+
3
GN
D5
NC
4
GN
D6
GN
D7
GN
D8
GN
D9
TP53
1
C4
10uF
/16V
(20%
)
D37
BAT5
4C1 23
TP49
1
D3
LESD
5D5.
0CT1
G
C19
3
0.1u
F/16
V(1
0%)
D4
LESD
5D5.
0CT1
G
SW2
SW_R
11
22
33
44
TP58
1TP
501
SW1
SW_R
11
22
33
44
R9
0R(5
%)
R22
947
.5K
(5%
)
TP64
1
D35
BAT5
4A
1 23
R28
65.
76K
(1%
)
R2
2.2K
(1%
)
R38
0R(5
%)
J2
SK-1
2D02
-VG
3
123
J1 USB
_CO
N8
VB
US
1
D-
2
D+
3
GN
D5
NC
4
GN
D6
GN
D7
GN
D8
GN
D9
R31
0R(5
%)
TP60
1
TP54
1
C10
10uF
/16V
(20%
)
C20
5
0.1u
F/16
V(1
0%)
TP52
1
R22
0R(5
%)
C11 0.1u
F/16
V(1
0%)
TP57
1
C14
0.1u
F/16
V(1
0%)
D36
BAT5
4C1 23
R3 2.2K
(1%
)
R29
1K(1
%)
D17
GR
EEN
LED
1 2
TP62
1
C18
0.1u
F/16
V(1
0%)(
NC
)
R1
0R(5
%)
R24
0R(5
%)
C5
22uF
/10V
(20%
)
C19
0.1u
F/16
V(1
0%)(
NC
)
TP65
1
C3
1uF/
16V(
10%
)
R5
10K(
5%)
Q8
L805
0QLT
1G
R22
822
.1K
(5%
)
D31
SS24
(NC
)
TP61
1
TP55
1
U5
CP2
102N
-A02
-GQ
FN28
DC
D1
RI
2
GN
D3
D+
4
D-
5
VD
D6
RE
GIN
7
VBUS8
RST9
NC110
SUSPEND11
SUSPEND12
NC213
NC314
NC
415
NC
516
NC
617
NC
718
NC
819
NC
920
NC
1021
NC1122 CTS23 RTS24 RXD25 TXD26 DSR27 DTR28 PGND29
C2
1uF/
16V(
10%
)
TP48
1
R33
100K
(1%
)(N
C)
D2 LE
SD5D
5.0C
T1G
R28
10K(
5%)(
NC
)
R28
710
K(5%
)
TP56
1
R28
810
K(5%
)
D1
SS24
TP51
1
R35
0R(5
%)
Q9
L805
0QLT
1G
TP63
1
C1
100u
F/6.
3V(2
0%)
C15
10uF
/16V
(20%
)
C12
22uF
/10V
(20%
)
U2
ESP3
2-W
RO
VER
-B
GN
D1
1
3V3
2
EN
3
SE
NS
OR
_VP
4
SE
NS
OR
_VN
5
IO34
6
IO35
7
IO32
8
IO33
9
IO25
10
IO26
11
IO27
12
IO14
13
IO12
14
GN
D2
15
IO13
16
SD
217
SD
318
CM
D19
CLK
20S
D0
21S
D1
22IO
1523
IO2
24IO
025
IO4
26N
C1
27N
C2
28IO
529
IO18
30IO
1931
NC
32IO
2133
RX
D0
34TX
D0
35IO
2236
IO23
37G
ND
338
P_G
ND
39
C13
10uF
/16V
(20%
)
U1
ESP3
2-W
RO
OM
-32D
(NC
)
GN
D1
1
3V3
2
EN
3
SE
NS
OR
_VP
4
SE
NS
OR
_VN
5
IO34
6
IO35
7
IO32
8
IO33
9
IO25
10
IO26
11
IO27
12
IO14
13
IO12
14
GN
D3
38
IO23
37
IO22
36
TXD
035
RX
D0
34
IO21
33
NC
32
IO19
31
IO18
30
IO5
29
IO17
28
IO16
27
IO4
26
IO0
25
GND215
IO1316
SD217
SD318
CMD19
CLK20
SD021
SD122
IO1523
IO224P
_GN
D39
Espressif ! /!12 17 2019.10
!
Appendix A
!
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
6-Ph
ysic
al-B
utto
ns:
Conn
ecto
r fo
r LE
D &
Butt
on &
MIC
(Re
serv
ed):
0.6V
MIC
MUTE
1.8V
2.42
V
1.2V
VOL+
PLAY/PAU
SE
VOL-
I2C_SC
L:IO
23I2C_SD
A:IO
18
Button A
rray
MUTE_ON_
OFF:
IO27
IO18
IO23
SEN
SOR
_VN
CX_
MIC
BIA
S1
CX_
MIC
BIA
S2
ExtF
FC_M
IC_I
NN
1Ex
tFFC
_MIC
_IN
P1
ExtF
FC_M
IC_I
NP2
ExtF
FC_M
IC_I
NN
2
IO27
SEN
SOR
_VN
SEN
SOR
_VN
IO23
IO18
CX_
MIC
BIA
S1
CX_
MIC
BIA
S2
ExtF
FC_M
IC_I
NP1
ExtF
FC_M
IC_I
NN
1
ExtF
FC_M
IC_I
NP2
ExtF
FC_M
IC_I
NN
2
IO27
CX_
GN
D
LED
_VC
C
CX_
GN
D
VCC
CX_
GN
DC
X_G
ND
CX_
GN
D
GN
D
VDD
33
GN
D
GN
D
GN
D
GN
D
SEN
SOR
_VN
2
IO23
2,5,
6IO
182,
5,6
CX_
MIC
BIA
S15
CX_
MIC
BIA
S25
ExtF
FC_M
IC_I
NP1
5Ex
tFFC
_MIC
_IN
N1
5
ExtF
FC_M
IC_I
NP2
5Ex
tFFC
_MIC
_IN
N2
5
IO27
2,5
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<03_
Butto
n& C
onne
ctor
>1.
3
ES
P32
-LY
RA
TD-S
YN
A
C
36
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<03_
Butto
n& C
onne
ctor
>1.
3
ES
P32
-LY
RA
TD-S
YN
A
C
36
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<03_
Butto
n& C
onne
ctor
>1.
3
ES
P32
-LY
RA
TD-S
YN
A
C
36
Frid
ay, A
ugus
t 30,
201
9
R40
2.2K
(1%
)
C13
7
0.1u
F/16
V(1
0%)S3
SW_R
11
22
33
44
S4
SW_R
11
22
33
44
D19
LESD
5D5.
0CT1
G
J13
AFC
01-S
16FC
A-00
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
S1
SW_R
11
22
33
44
S2 SW_R
11
22
33
44
R39
5.76
K(1
%)
R37
12K(
1%)
C17
10nF
/50V
(10%
)
R30
10K(
5%)
R27
60R
(5%
)
R32
27.4
K(1
%)
C13
8
10uF
/16V
(20%
)
Espressif ! /!13 17 2019.10
!
Appendix A
!
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
Note:
Include
+1.0V
Test P
oint
as s
hown i
n all
designs.
Place
L16, C
149, C
150
close
to C
X20921 d
evice.
Critical L
ayout
Note:
C146 n
egative
terminal a
nd C
150
negative t
erminal
connecting
to
PGND s
hould
both b
e placed v
ery
close
to p
in 6
of
the
CX20921
device.
The
PGND-GND 5
0-mil
tie
connection
should
be c
lose t
o the
C146/C150/
Pin_6
junction.
Doing
this w
ill
minimize t
he G
ND b
ounce
in t
he D
C-DC c
onverter a
rea.
VISHAY:IFS
C151
5AHE
R2R2
M01.
Note:
Include
resistor l
adder
and
capacitor
as s
hown i
n all
designs.
Single e
nded:45ohm
Differen
tial
:90o
hm
+5V_
USB
USB_
DPUSB_
DM
GND
TXC:
7A-24.
000M
AAJ-
T
Note:
VDDO_1
and
VDDO_2 s
hould
connect
directly t
o +3.3V
or +
1.8V
external S
ystem
power, b
ased o
n I/O
signal l
evel r
equirement
s.
VDDO_1 -
Input s
upply
which
internally
powers
I2S
TX,
I2C
Slave, S
PI M
aster, a
nd R
ESET i
nterfaces.
VDDO_2 -
Input s
upply
which
internally
powers
I2S
RX,
GPIOs, U
ART
and
DMIC i
nterfaces.
VDDO_3 -
Input s
upply
which
internally
powers
the
USB
interface,
must
always c
onnect t
o +3.3V
only.
Create P
GND
plane, s
eparate
from
normal G
ND (
Digital
Ground)
plane
for
internal D
CDC.
Tie
the
PGND t
o Digital
Ground p
lanes
together a
t C
146/C150/P
in_6 j
unction
using
50-mil
trace.
DCDC/DIG
ITAL/M
IC G
ROUN
DS
Mic
section
has
its
own
plane
MGND
.Tie
MGND t
o GND
with 5
0-mils
metal
plane
on B
ottom
layer.
Shor
t PG
ND
to D
GN
D d
irect
ly w
ith a
trac
e.Sh
ort M
GN
D to
DG
ND
dire
ctly
with
a tr
ace
Do
not u
se a
res
isto
r or
ferr
ite b
etw
een
the
grou
nds.
Powe
r fo
r CX
2092
1：Fr
om C
X209
21 d
atas
heet
P18
.Po
wer
cons
umpt
ion
max
is 3
.3x4
9mA=
161.7m
W.
3.3V
/400
mA
CX_
USB
_DP
CX_
USB
_DM
CX_
USB
_5VD
ET
CX2
0921
_3V
3
CX_
PG
ND
CX_
GN
D
CX2
0921
_3V
3
CX_
PG
ND
CX2
0921
_3V
3
CX_
GN
D
CX2
0921
_1V
0
CX_
PG
ND
CX_
GN
D
CX_
GN
D
CX_
GN
D
CX_
GN
DC
X_G
ND
CX2
0921
_1V
0C
X209
21_3
V3
CX_
GN
D
CX2
0921
_3V
3
CX2
0921
_3V
3
CX_
GN
D
CX2
0921
_3V
3
CX_
GN
DC
X209
21_1
V0
CX_
GN
DC
X_G
ND
CX_
MG
ND
CX_
MG
ND
CX_
GN
D
CX_
GN
D
CX2
0921
_3V
3
CX_
GN
DC
X_M
GN
DC
X_P
GN
D
CX_
GN
D
CX_
GN
D
VCC
CX_
GN
D
CX_
GN
D
CX2
0921
_3V
3
CX_
GN
D
CX_
GN
DD
GN
D
VDD
33
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<04_
CX2
0921
_Pow
er>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
46
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<04_
CX2
0921
_Pow
er>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
46
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<04_
CX2
0921
_Pow
er>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
46
Frid
ay, A
ugus
t 30,
201
9
R77
10K(
5%)
C16
4
10nF
/50V
(10%
)
R23
40R
(5%
)
R18
022
.1R
(5%
)
C16
1
10nF
/50V
(10%
)
C14
5
0.1u
F/16
V(1
0%)
C16
5
10uF/16V(20%)
TP21 1
C16
8
0.1uF/16V(10%)
C15
4
10nF
/50V
(10%
)
R80
10K(
5%)(
NC
)
C14
6
10uF
/16V
(20%
)
C16
2
1uF/
25V(
10%
)
C16
6
0.1uF/16V(10%)
R18
122
.1R
(5%
)
POWE
R
U19
E
CX2
0921
_60P
_EN
G
VD
D33
_AN
A38
VD
D_L
DO
33A
NA
OU
T43
VD
D_L
DO
33IN
44
VD
D_L
DO
12O
UT
45
EP
61
VD
DO
_14
VD
DO
_221
VD
DO
_328
VD
D5
VD
D9
VD
D20
VD
D27
VD
D50
VD
D56
VD
DO
_155
TP22 1
C15
5
1uF/
25V(
10%
)
C17
8
10nF
/50V
(10%
)
R17
6
100K
(1%
)
C16
9
0.1uF/16V(10%)
R17
730
1K(1
%)
TP23 1
C17
9
1uF/
25V(
10%
)
C18
0
10nF
/50V
(10%
)
C66
4.7u
F/10
V(2
0%)
C15
1
1uF/
16V(
10%
)
C15
8
10nF
/50V
(10%
)
C17
0
0.1uF/16V(10%)
TP24 1
C15
6
0.1u
F/16
V(1
0%)
C18
1
1uF/
25V(
10%
)
C15
322
pF/5
0V(5
%)
C15
9
1uF/
25V(
10%
)
C14
7
10nF
/50V
(10%
)
C17
2
1uF/
25V(
10%
)
C15
7
10uF
/16V
(20%
)
C17
1
0.1uF/16V(10%)
R26
3
52.3
K(1
%)
C14
8
1uF/
25V(
10%
)
C15
222
pF/5
0V(5
%)
C17
3
10nF
/50V
(10%
)
C16
0
10nF
/50V
(10%
)
R21
40R
(5%
)
R18
233
R(5
%)
R26
4
30.1
K(1
%)
TP20 1
XTAL
DCDC
USB
U19
D
CX2
0921
_60P
_EN
G
DC
DC
_PV
SS
6
US
B_D
P29
AV
DD
3313
PS
UP
_1V
046
PS
UP
_3V
349
XIN
47
XO
UT
48
US
B_D
M30
DC
DC
_EN
11
DC
DC
_FB
12
DC
DC
_IR
EF
10
DC
DC
_SW
7
PV
DD
338
US
B_5
VD
ET
31
C17
4
10nF
/50V
(10%
)
C14
9
0.1u
F/16
V(1
0%)
Y3 24M
Hz
C68
0.1u
F/16
V(1
0%)
L16
2.2u
H(2
0%)@
3A
R17
880
.6K
(5%
)
C17
5
1uF/
25V(
10%
)
C15
0
10uF
/16V
(20%
)
C69
10uF
/16V
(20%
)
C67 10nF/50V(10%)(NC)
R17
913
0K(5
%)
R27
50R
(5%
)(N
C)
C16
3
1uF/
25V(
10%
)
C16
7
0.1uF/16V(10%)
U11
RT9
043G
B@40
0mA
EN
3
OU
T5
VIN
1
NR
/FB
4
GND2
R18
32.
2R(1
%)
Espressif ! /!14 17 2019.10
!
Appendix A
!
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
Digi
tal
MEMS
Opt
ion
CX20
921
I2S
Bloc
k:CX
2092
1 Co
mmun
icat
ion
Bloc
k:
Note
:Fo
r AS
R de
sign
s, t
he G
PIO
to h
ost
proc
esso
r co
nnec
tion
is
requ
ired
.Fo
r Vo
IP d
esig
ns,
the
GPIO
to
host
con
nect
ion
is o
ptio
nal.
DSP
RESET
: IO19
Codec_I2
S_MC
LK
DSP_I2C_SDA
: IO18
DSP_I2C_SCL
: IO23
DSP
GPIO
DSP_I2S_BCLK :
IO33
DSP_I2S_DO :
IO35
DSP_I2S_LRCK :
IO32
MUTE_ON_
OFF:
IO27
To M
CU;
From
MCU
;
MIC
MUTE
LED
CX20
921
Mic
Bloc
k:
Anal
og M
ic I
nput
:
Note
:If
the
mic
fro
m FF
C co
nnec
tor
is a
nalo
g ME
MS,
R277
,R27
8,R2
79,R
280,
sho
uld
be s
urfa
ce-m
ount
ed,
And
R53,
R52,
R67,
R69,
sho
uld
be N
C.
MIC
INPUT
Opti
on1
Opti
on2
AEC_I2
S_FS
:AEC_I2S_
DATA
:
AEC_I2S_
BCLK
:
CX_
TXD
CX_
RTS
/DM
IC_C
LK
CX_
CTS
/DM
IC_D
AT
CX_
RXD
CX_
I2C
_SD
A
CX_
GPI
O_1
CX_
RST
N
CX_
RST
N
CX_
I2C
_SC
L
CX_
I2S_
TX_D
ATA
CX_
I2C
_SC
L
CX_
TXD
CX_
I2S_
TX_C
LKC
X_I2
S_TX
_LR
CK
CX_
GPI
O_1
IO27
IO27
CX_
INPU
T_IN
P1
CX_
INPU
T_IN
N1
IO27
CX_
AN
A_IN
P1
CX_
AN
A_IN
N1
CX_
MIC
BIA
S1
CX_
INPU
T_IN
P2
CX_
INPU
T_IN
N2
IO27
CX_
AN
A_IN
P2
CX_
AN
A_IN
N2
CX_
MIC
BIA
S2
CX_
I2S_
RX_
CLK
CX_
I2S_
RX_
LRC
K
CX_
I2S_
RX_
DAT
A2
CX_
I2S_
RX_
DAT
A3
CX_
I2S_
TX_L
RC
K
CX_
I2S_
TX_C
LK
CX_
I2S_
TX_D
ATA
CX_
AN
A_IN
P1
CX_
AN
A_IN
N1
CX_
AN
A_IN
P2
CX_
AN
A_IN
N2
CX_
MIC
BIA
S1
CX_
MIC
BIA
S2IO
27
CX_
I2C
_SD
A
CX_
GPI
O_1
CX_
MIC
BIA
S1
CX_
MIC
BIA
S2
ExtF
FC_M
IC_I
NP1
ExtF
FC_M
IC_I
NN
1
ExtF
FC_M
IC_I
NP2
ExtF
FC_M
IC_I
NN
2
ExtF
FC_M
IC_I
NP1
CX_
INPU
T_IN
P1O
nBoa
rd_M
IC_I
NP1
AuxI
N_M
IC_I
NP1
CX_
INPU
T_IN
N1
OnB
oard
_MIC
_IN
N1
AuxI
N_M
IC_I
NN
1Ex
tFFC
_MIC
_IN
N1
CX_
INPU
T_IN
P2O
nBoa
rd_M
IC_I
NP2
AuxI
N_M
IC_I
NP2
ExtF
FC_M
IC_I
NP2
CX_
INPU
T_IN
N2
OnB
oard
_MIC
_IN
N2
AuxI
N_M
IC_I
NN
2Ex
tFFC
_MIC
_IN
N2
OnB
oard
_MIC
_IN
P2
OnB
oard
_MIC
_IN
N2
OnB
oard
_MIC
_IN
P1
OnB
oard
_MIC
_IN
N1
AuxI
N_M
IC_I
NN
1Au
xIN
_MIC
_IN
P1
AuxI
N_M
IC_I
NN
2Au
xIN
_MIC
_IN
P2
CX2
0721
_BC
LKC
X207
21_L
RC
LKC
X207
21_A
DC
DAT
CX2
0721
_BC
LK
CX2
0721
_LR
CLK
CX_
I2S_
RX_
DAT
A1C
X207
21_A
DC
DAT
CX_
GN
D
CX2
0921
_3V
3
CX_
GN
D
CX2
0921
_3V
3C
X209
21_3
V3
CX2
0921
_3V
3
CX_
GN
D
CX_
GN
D
CX_
GN
D
CX2
0921
_3V
3
CX_
GN
DC
X_G
ND
CX2
0921
_3V
3
DG
ND
CX2
0921
_3V
3
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX2
0921
_3V
3 CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
GN
D
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
CX_
MG
ND
VDD
33
CX2
0921
_3V
3
CX_
GN
D
CX_
GN
DC
X_G
ND
CX_
GN
DC
X_G
ND
IO19
2
IO18
2,3,
6
IO35
2
CX_
TXD
6
IO23
2,3,
6
IO33
2IO
322
CX_
GPI
O_1
2
IO27
2,3
CX_
MIC
BIA
S13
CX_
MIC
BIA
S23
ExtF
FC_M
IC_I
NP1
3Ex
tFFC
_MIC
_IN
N1
3
ExtF
FC_M
IC_I
NP2
3Ex
tFFC
_MIC
_IN
N2
3
CX2
0721
_BC
LK6
CX2
0721
_LR
CLK
6C
X207
21_A
DC
DAT
6
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<05_
CX2
0921
_Int
erfa
ce>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
56
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<05_
CX2
0921
_Int
erfa
ce>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
56
Frid
ay, A
ugus
t 30,
201
9
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<05_
CX2
0921
_Int
erfa
ce>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
56
Frid
ay, A
ugus
t 30,
201
9
I2S
U19
A
CX2
0921
_60P
_EN
G
I2S
_TX
_CLK
3
I2S
_TX
_DA
TA_1
1
I2S
_TX
_LR
CK
2
I2S
_RX
_CLK
22
I2S
_RX
_DA
TA_1
23
I2S
_RX
_LR
CK
24
I2S
_RX
_DA
TA_2
25
I2S
_RX
_DA
TA_3
26
TP77 1
R69
1.1K
(5%
)
R20
1
10K(
5%)
J16
CO
N3x
1_2P
54
123
D29
LESD
8D3.
3CAT
5G(N
C)
TP34 1
TP26 1
R30
00R
(5%
)
R53
1.1K
(5%
)
J4
CO
N21
1
22
C18
5
10nF
/50V
(10%
)D
30
LESD
8D3.
3CAT
5G(N
C)
L17
39nH
(±2%
)
J17
CO
N3x
1_2P
54
123
L19
39nH
(±2%
)
TP27 1U
20
W25
Q32
FVSS
IG
/CS
1
DO
2
/WP
3GND
4
DI
5
CLK
6
/HO
LD7
VCC8
R20
633
R(5
%)
C18
6
10nF
/50V
(10%
)
D32
LESD
8D3.
3CAT
5G(N
C)
R27
90R
(5%
)(N
C)
R19
110
K(5%
)
R18
40R
(5%
)
TP28 1
R28
210
K(5%
)
R197 1.8K(5%)(NC)
C19
0
10pF
/50V
(5%
)(N
C)
R20
40R
(5%
)
R19
4
10K(
5%)(
NC
)
R20
30R
(5%
)
D33
LESD
8D3.
3CAT
5G(N
C)
L20
39nH
(±2%
)
R29
90R
(5%
)
R28
40R
(5%
)
C50
10nF
/50V
(10%
)
R20
733
R(5
%)
C18
8
10uF
/16V
(20%
)(N
C)
L18
39nH
(±2%
)
R19
233
R(5
%)
R52
1.1K
(5%
)
R18
50R
(5%
)
R86
0R(5
%)
J14
CO
N3x
1_2P
54
123
D18
RED
LED
R20
90R
(5%
)
C18
9
10uF
/16V
(20%
)(N
C)
C52
10nF
/50V
(10%
)
TP29 1
C53
10pF
/50V
(5%
)
Audio
PortU
19B
CX2
0921
_60P
_EN
G
AN
A_I
NP
140
MIC
BIA
S2
32M
ICB
IAS
141
AN
A_I
NN
139
AN
A_I
NP
233
AN
A_I
NN
234
VR
EFN
36
VR
EFP
35
VR
EF
42
VS
S_R
EF
37
C34
10nF
/50V
(10%
)
Q7
LBSS
138L
T1G
TP30 1
R29
75.
76K
(1%
)
R27
80R
(5%
)(N
C)
C51
470p
F/50
V(10
%)
R198 1.8K(5%)(NC)
R18
60R
(5%
)
C36
10nF
/50V
(10%
)
R20
50R
(5%
)
TP31 1
C32
10pF
/50V
(5%
)
R27
70R
(5%
)(N
C)
R20
80R
(5%
)
Q11
LBSS
138L
T1G
R21
249
.9R
(1%
)
R19
90R
(5%
)
C54
33pF
/50V
(±2p
F)
C18
4
1uF/
25V(
10%
)
TP32 1
R19
3
10K(
5%)(
NC
)
R19
50R
(5%
)
C19
147
0pF/
50V(
10%
)
C33
33pF
/50V
(±2p
F)
R18
70R
(5%
)
U23
TS3A
4742
DC
N
IN1
1
IN2
6C
OM
17
CO
M2
4
VCC2
GND5
NC
23
NC
18
R29
610
K(5%
)
R21
349
.9R
(1%
)
J15
CO
N3x
1_2P
54
123
R20
00R
(5%
)
R20
210
0K(1
%)
J5
CO
N21
1
22
C18
20.
1uF/
16V
(10%
)
TP25 1
R29
80R
(5%
)
U22
TS3A
4742
DC
N
IN1
1
IN2
6C
OM
17
CO
M2
4
VCC2
GND5
NC
23
NC
18
TP38
1
R19
60R
(5%
)R
188
4.7K
(5%
)
TP76 1
C48
10pF
/50V
(5%
)
J18
A125
1WR
-S-4
P
11
22
33
44
C20
70.
1uF/
16V
(10%
)
R19
04.
7K(5
%)
R21
049
.9R
(1%
)
C18
3
1uF/
16V(
10%
)
I2C
Slave
SPI
Mast
er
GPIO
UART
U19
C
CX2
0921
_60P
_EN
G
SP
I_M
O51
SP
I_M
I53
S_S
DA
58
SP
I_C
K52
S_S
CL
59
SP
I_S
S0
54
TES
T57
TXD
14
RX
D15
CTS
16
RTS
17
GP
IO_1
18
GP
IO_2
19
RS
TN60
C18
7
1uF/
25V(
10%
)
TP33 1
C37
10pF
/50V
(5%
)
C49
33pF
/50V
(±2p
F)
R18
94.
7K(5
%)
TP39
1
C20
60.
1uF/
16V
(10%
)
R30
65.
76K
(1%
)
C38
33pF
/50V
(±2p
F)
R67
1.1K
(5%
)
R21
149
.9R
(1%
)
R28
00R
(5%
)(N
C)
D34
GR
EEN
LED
12
Espressif ! /!15 17 2019.10
!
Appendix A
!
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
SPK:
Phon
e Ja
ck:
Codec_EA
PD:I
O4
Codec_I2C_
SDA:
IO18
Codec_I2C_
SCL:
IO23
PJ_DET
:IO2
1
Codec_SPK_
MUTE
:IO2
2
Codec_I2S_
BCLK
:IO5
Codec_I2S_
FS:I
O25
Codec_I2S_
SDI0
:IO2
6
Codec_I2S_
MCLK
:IO0
AEC_I2S_
BCLK
:
1.When P
J is n
ot p
lugged i
n,
PJ_JSENSE
is p
ulled
low,
thus m
usic o
utput
via
speaker.
2.When P
J is p
lugged i
n,
PJ_JSENSE
is p
ulled
high,
thus m
usic o
utput
via
PJ.
Codec_I2
S_MC
LK
Code
c:
AEC_I2
S_FS
:AEC_I2S_
DATA
:
Powe
r Su
pply
for
Cod
ec:
3.3V
/400
mA
1.8V
/150
mA
RO
UTP
RO
UTN
LOU
TN
LOU
TP
HP_
A_R
HP_
A_L
IO18
IO4IO
23
IO21
IO22IO
0IO
5IO
25IO
26
PJ_D
ET
CX_
TXD
IO22
CX2
0721
_SPK
R_M
UTE
CX2
0721
_Jac
k_S
ense
_IR
Q
CX_
TXD
HP_
A_L
HP_
A_R
HG
ND
AH
GN
DB
POR
TD_A
_MIC
POR
TD_B
_MIC
MIC
/LIN
EIN
_B_L
MIC
/LIN
EIN
_B_R
MIC
BIA
S_B
CX2
0721
_BC
LKC
X207
21_L
RC
LKC
X207
21_A
DC
DAT
CX2
0721
_DAC
DAT
IO0
IO5
IO25
IO26
CX2
0721
_MC
LK
IO23
IO18
CX2
0721
_SC
LC
X207
21_S
DA
DM
IC1_
CLK
DM
IC1_
DAT
RO
UTN
RO
UTP
LOU
TP
LOU
TN
CX2
0721
_BC
LKC
X207
21_L
RC
LKC
X207
21_A
DC
DAT
IO4
CX2
0721
_EAP
D
IO21
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_A
GN
D
Cod
ec_A
GN
D
Cod
ec_A
GN
D
Cod
ec_A
GN
DC
odec
_AG
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
CX2
0721
_3V
3
VDD
18
Cod
ec_G
ND
Cod
ec_G
ND
GN
DC
odec
_GN
DC
odec
_GN
DC
odec
_AG
ND
Cod
ec_G
ND
Cod
ec_A
GN
D
Cod
ec_A
GN
D
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_A
GN
D
Cod
ec_G
ND
AVD
D5
Cod
ec_A
GN
DC
odec
_AG
ND
CP_
VD
D18
Cod
ec_G
ND
Cod
ec_G
ND
VDD
18
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
PVD
D5_
L/R
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
CX2
0721
_3V
3
CX2
0721
_3V
3
Cod
ec_G
ND
CX2
0721
_3V
3
Cod
ec_G
ND
CX2
0721
_3V
3
Cod
ec_A
GN
D
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_V
CC
Cod
ec_V
CC
CX2
0721
_1V
8C
X207
21_1
V8
Cod
ec_G
ND
Cod
ec_V
CC
Cod
ec_G
ND
Cod
ec_G
ND
CX2
0721
_3V
3
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_V
CC
Cod
ec_G
ND
CX2
0721
_1V
8
Cod
ec_G
ND
Cod
ec_G
ND
Cod
ec_G
ND
VCC
Cod
ec_V
CC
IO18
2,3,
5
IO4
2
IO23
2,3,
5
IO21
2
IO22
2
IO0
2IO
52
IO25
2IO
262
CX_
TXD
5
CX2
0721
_BC
LK5
CX2
0721
_LR
CLK
5C
X207
21_A
DC
DAT
5
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<06_
Cod
ec>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
66
Thur
sday
, Sep
tem
ber 0
5, 2
019
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<06_
Cod
ec>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
66
Thur
sday
, Sep
tem
ber 0
5, 2
019
Title
Siz
eD
ocum
ent
Num
ber
Re
v
Dat
e:S
heet
of
<06_
Cod
ec>
1.3
ES
P32
-LY
RA
TD-S
YN
A
C
66
Thur
sday
, Sep
tem
ber 0
5, 2
019
U13
RT9
043G
B@40
0mA
EN
3
OU
T5
VIN
1
NR
/FB
4
GND2
C10
22.
2uF/
10V
(10%
)
R10
40R
(5%
)
PJ-3
930-
A
J7
11
22
33
44
55
66
77
88
C98
1000
pF/5
0V(5
%)(
NC
)
C125 390pF/50V(10%)(NC)
R27
210
K(5%
)
C99
1000
pF/5
0V(5
%)(
NC
)
R23
90R
(5%
)
C12
0
0.1u
F/16
V(1
0%)
C11
9
10uF
/16V
(20%
)
C12
4
330p
F/50
V(10
%)(
NC
)
C10
11u
F/16
V(10
%)
R90
10K(
5%)
R91
0R(5
%)
R28
30R
(5%
)(N
C)
D27
LESD
8D3.
3CAT
5G(N
C)
R23
70R
(5%
)
TP42
1
R25
9
52.3
K(1
%)
C96
1000
pF/5
0V(5
%)(
NC
)
TP6
1
C97
1000
pF/5
0V(5
%)(
NC
)
R87
0R(5
%)
R24
45.
1R(5
%)
R95
4.7K
(5%
)(N
C)
R98
4.7K
(5%
)(N
C)
R10
147
R(1
%)
C90
0.1u
F/16
V(1
0%)
R11
50R
(5%
)
C12
1
0.1u
F/16
V(1
0%)
TP45
1
C20
0
4.7u
F/10
V(2
0%)
R10
80R
(5%
)
R24
20R
(5%
)
C12
8
330p
F/50
V(10
%)(
NC
)
R31
20R
(5%
)
R10
60R
(5%
)(N
C)
R24
35.
1R(5
%)
C19
8
0.1u
F/16
V(1
0%)
R30
910
K(5%
)(N
C)
R26
1
10K(
5%)
R24
10R
(5%
)
C10
8
4.7u
F/10
V(2
0%)
C11
2
0.1u
F/16
V(1
0%)
R92
0R(5
%)
C12
2
330p
F/50
V(10
%)(
NC
)
C80
22pF
/50V
(NC
)
C11
5
0.1u
F/16
V(1
0%)
R25
80R
(5%
)
C88
4.7u
F/10
V(2
0%)
R11
1
100K
(1%
)
R10
247
R(1
%)
L22
0R(5
%)
R31
10R
(5%
)
C11
0
4.7u
F/10
V(2
0%)
C126 390pF/50V(10%)(NC)
R26
2
10K(
5%)(
NC
)
C86
22pF
/50V
(NC
)
C10
02.
2uF/
10V
(10%
)
C10
9
0.1u
F/16
V(1
0%)
C19
9
10uF
/16V
(20%
)
R23
10R
(5%
)
TP43
1
R84
33R
(5%
)
C12
3
330p
F/50
V(10
%)(
NC
)
R23
80R
(5%
)
L21
0R(5
%)
TP41
1
R93
33R
(5%
)
R23
20R
(5%
)
R31
010
K(5%
)
C19
6
10nF/50V(10%)(NC)
C11
7
100u
F/6.
3V(2
0%)(
NC
)
R24
00R
(5%
)
R11
4
10K(
5%)(
NC
)TP
461
R85
33R
(5%
)
C79
0.1u
F/16
V(1
0%)
C10
32.
2uF/
10V
(10%
)
R26
0
30.1
K(1
%)
J9
A200
1WR
-S-2
P
R29
00R
(5%
)
R11
310
K(5%
)
U21
TPS7
1718
DC
KR
EN
3
OU
T5
VIN
1
NR
/FB
4
GND2
R11
70R
(5%
)
C81
220p
F/50
V(5%
)
C11
6
0.1u
F/16
V(1
0%)
C85
220p
F/50
V(5%
)
R11
010
K(5%
)(N
C)
R89
47R
(1%
)
C10
6
0.1u
F/16
V(1
0%)
J8
A200
1WR
-S-2
P
R11
80R
(5%
)
C87
220p
F/50
V(5%
)
U12
CX2
0721
-11Z
/CX2
2721
-11Z
DA
CD
AT
1
MC
LK2
VDDIO3
SC
L4
SD
A5
MU
SIC
_RE
Q/S
PD
IF/G
PIO
06
SP
KR
_MU
TE#/
SP
DIF
/GP
IO1
7
PO
RTC
_DM
IC_D
ATA
1/G
PIO
38
DVDD_IO9
PO
RTC
_DM
IC_C
LK1/
GP
IO2
10
EA
PD
11
PORTG_LEFT_P12
PVDD5_LEFT13
PORTG_LEFT_N14
PORTG_RIGHT_N15
PVDD5_RIGHT16
PORTG_RIGHT_P17
CP_VDD1818
CP
_FLY
_P19
CP
_FLY
_N20
CP_VNEG21
CP_VPOS22
PO
RTA
_L23
PO
RTA
_R24
HG
ND
A25
HG
ND
B26
VREF_DAC27 V
RE
FP28
AVDD529
PO
RTD
_A30
PO
RTD
_B31
MIC
BIA
SB
32
PO
RTB
_L33
PO
RTB
_R34
JSE
NS
E35
PC
BE
EP
36
LDO_AVDD37
VDD1838
LDO_VDD_CORE39
BC
LK40
LRC
LK41
AD
CD
AT
42
EXP_GND43
R10
047
R(1
%)
C10
7
4.7u
F/10
V(2
0%)
C11
8
10uF
/16V
(20%
)
R11
90R
(5%
)
C19
7
10nF
/50V
(10%
)
TP5
1
R11
20R
(5%
)
C10
50.
47uF
/16V
(10%
)
D28
LESD
8D3.
3CAT
5G(N
C)
C11
4
10uF
/16V
(20%
)
C82
220p
F/50
V(5%
)
TP44
1
R10
533
R(5
%)(
NC
)
C10
41u
F/16
V(10
%)
TP47
1
Espressif ! /!16 17 2019.10
Disclaimer and Copyright Notice Information in this document, including URL references, is subject to change without notice. THIS DOCUMENT IS PROVIDED AS IS WITH NO WARRANTIES WHATSOEVER, INCLUDING ANY WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY OTHERWISE ARISING OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE. All liability, including liability for infringement of any proprietary rights, relating to use of information in this document is disclaimed. No licenses express or implied, by estoppel or otherwise, to any intellectual property rights are granted herein. The Wi-Fi Alliance Member logo is a trademark of the Wi-Fi Alliance. The Bluetooth logo is a registered trademark of Bluetooth SIG. All trade names, trademarks and registered trademarks mentioned in this document are property of their respective owners, and are hereby acknowledged. Copyright © 2019 Espressif Inc. All rights reserved.
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