Nuvoton I94100 Series User manual

I94124_NAU88C22_MB
July 30, 2020 Page 1of 22 Rev 1.0
ARM®Cortex®-M4
32-bit Microcontroller
I94124_NAU88C22 User Manual
I94100 Series
The information described in this document is the exclusive intellectual property of
Nuvoton Technology Corporation and shall not be reproduced without permission from Nuvoton.
Nuvoton is providing this document only for reference purposes of NuMicro microcontroller based system
design. Nuvoton assumes no responsibility for errors or omissions.
All data and specifications are subject to change without notice.
For additional information or questions, please contact: Nuvoton Technology Corporation.
www.nuvoton.com

I94124_NAU88C22_MB
July 30, 2020 Page 2of 22 Rev 1.0
Table of Contents
1Overview....................................................................................5
1.1 I94124_NAU88C22_MB Features....................................................................6
1.2I94124_MB_NAU85L40_NR Features...............................................................6
1.3 I94124_MB_DMIC Features...........................................................................6
2I94124_NAU88C22_MB Board Overview.............................................7
2.1 Front View ................................................................................................7
2.2 Rear View.................................................................................................8
2.3 Power System............................................................................................9
2.4 Pin Assignment for IO Extension Connectors.....................................................10
2.5 System Configuration.................................................................................13
2.5.1 Power Source .......................................................................................13
2.5.2 3.3V LDO.............................................................................................13
2.5.3 USB Connector .....................................................................................13
2.5.4 IO Extension Connectors..........................................................................13
2.5.5 Push-Buttons ........................................................................................13
2.5.6 LED ...................................................................................................13
2.5.7 Power Connectors..................................................................................13
2.5.8 Clock Source ........................................................................................14
2.5.9 Nu-Link Interface....................................................................................14
2.5.10 SPI Flash interface .................................................................................14
2.5.11 Others ................................................................................................14
2.6 Components Placement..............................................................................15
3I94124ADI EVB Schematics........................................................... 17
3.1 I94124_NAU88C22_MB..............................................................................17
3.2 I94124_MB_NAU85L40_NR.........................................................................19
3.3 I94124_MB_DMIC.....................................................................................20
4REVISION HISTORY................................................................... 21

I94124_NAU88C22_MB
July 30, 2020 Page 3of 22 Rev 1.0
List of Figures
Figure 1.1-1 I94124_NAU88C22_MB with AMIC/DMIC extension boards...................................... 5
Figure 2.1-1 Front View of I94124_NAU88C22_MB........................................................................ 7
Figure 2.2-1 Rear View of I94124_NAU88C22_MB ........................................................................ 8
Figure 2.3-1 Power Supply Block Diagram...................................................................................... 9
Figure 2.4-1 I94124ADI IO Extension Connectors......................................................................... 10
Figure 2.6-1 I94124_NAU88C22_MB Front Placement ................................................................ 15
Figure 2.6-2 I94124_NAU88C22_MB Rear Placement................................................................. 15
Figure 2.6-3 I94124_MB_NAU85L40_NR Front Placement.......................................................... 16
Figure 2.6-4 I94124_MB_NAU85L40_NR Rear Placement .......................................................... 16
Figure 2.6-5 I94124_MB_DMIC Front Placement.......................................................................... 16
Figure 2.6-6 I94124_MB_DMIC Rear Placement.......................................................................... 16
Figure 3.1-1 I94124_NAU88C22_MB circuit (1/2) I94124 part...................................................... 17
Figure 3.1-2 I94124_NAU88C22_MB circuit (2/2) NAU88C22 part............................................... 18
Figure 3.2-1 I94124_MB_NAU85L40_NR Circuit.......................................................................... 19
Figure 3.3-1 I94124_MB_DMIC Circuit.......................................................................................... 20

I94124_NAU88C22_MB
July 30, 2020 Page 4of 22 Rev 1.0
List of Tables
Table 2-1 I94124ADI IO Extension Interface Connector J8........................................................... 11
Table 2-2 I94124ADI IO Extension Interface Connector J5........................................................... 11
Table 2-3 I94124ADI IO Extension Interface Connector J4........................................................... 12
Table 2-4 I94124ADI IO Extension Interface Connector J7........................................................... 12

I94124_NAU88C22_MB
July 30, 2020 Page 5of 22 Rev 1.0
1 OVERVIEW
I94124_NAU88C22_MB board is the specific development tool for I94100 series with NAU88C22 to
support MIC, AUXIN and headphone on one board. User can use it to develop and verify the audio
application program easily.
To support more microphone, it can connect with I94124_MB_NAU85L40_NR (NAU85L40+AMIC) and
I94124_MB_DMIC (DMIC Daughter board). The connection is as the below figure.
Figure 1.1-1 I94124_NAU88C22_MB with AMIC/DMIC extension boards

I94124_NAU88C22_MB
July 30, 2020 Page 6of 22 Rev 1.0
1.1 I94124_NAU88C22_MB Features
Nu-Link ICE interface connector.
Audio board extension interface connectors.
USB 1.1 Full-Speed Device.
Two push-buttons: one is for reset and the other one is for user-defined.
Two LEDs: one is for power indication, the other one is for user-defined.
Two MIC and two AUXIN input through NAU88C22.
Speaker and headphone output through NAU88C22.
1.2 I94124_MB_NAU85L40_NR Features
Maximum 4 channel AMIC supported
Stereo line-in with 2 MIC channels
Two sets of 7-segments LED display by IO control
1.3 I94124_MB_DMIC Features
Maximum 4 channel DMIC channel connection with I94124

I94124_NAU88C22_MB
July 30, 2020 Page 7of 22 Rev 1.0
2 I94124_NAU88C22_MB BOARD OVERVIEW
2.1 Front View
Figure 2.1-1 shows the main components and connectors from the front side of EVB-I94124ADI board.
The following lists components and connectors from the front view:
Target Chip: I94124ADI (U1)
Nu-Link interface (J1)
I94124ADI IO extension interface connectors (J4, J5, J6 and J7)
USB: USB connector (CN1)
Push-buttons (SW1, SW2)
LED: POWER LED (D3, green), User Application LED (D4, red)
Power connectors (J1, J2, CN1)
Figure 2.1-1 Front View of I94124_NAU88C22_MB
I94100ADI
Microcontroller
RTC
XTAL
SPI Flash
Interface
12.288
MHz XTAL
AUXIN
Headphone
Out
MIC1
MIC2
N88C22
connection
jumper
LED (Red)
User Button
Reset
VDD_3V3
Jumper
UART
Power LED
(Green)
Nu-Link
Interface
3.3V
VBAT +5V
Speaker
header
NAU88C22YG
USB/Power

I94124_NAU88C22_MB
July 30, 2020 Page 8of 22 Rev 1.0
2.2 Rear View
Figure 2.2-1 shows the rear side of I94124_NAU88C22_MB board.
Figure 2.2-1 Rear View of I94124_NAU88C22_MB
SPI Flash

I94124_NAU88C22_MB
July 30, 2020 Page 9of 22 Rev 1.0
2.3 Power System
The I94124_NAU88C22_MB supplied by an external 5V USB power connected to Micro USB
connectors (CN1 or J1) or 4.5 Volt to 5.0 Volt DC power supply connected to VCC Pin Header (J2). On-
board reversed 2 current protection diodes will ensure power can be provided through both USB
connectors at the same time safely. If the board is powered from USB connector, it is not recommended
to apply an additional DC power supply to VCC pin header (J2), because there is no protection against
reverse current into the DC power supply. Figure 2.3-1 shows I94124_NAU88C22_MB power supply
concept.
Figure 2.3-1 Power Supply Block Diagram
I94100ADI
USB_
Mini
ICE-5V
DC Power
(Vbat)
LDO
3.3V
VDD
3.3V
VDDA/VDDB/VDDC
USB_5V
D1
Jump
(sp1)
5V
U1
U3
CN1
J2
ICE_5V
J1(Nu_Link)
D2
4.5V~5V
I94124_NAU88C22_MB
NAU88C22YG
VDDSPK

I94124_NAU88C22_MB
July 30, 2020 Page 10 of 22 Rev 1.0
2.4 Pin Assignment for IO Extension Connectors
Most of IO pins of the I94124ADI are pin out to the connectors J4, J5, J7and J8 for extension. The
Figure 2.4-1 shows the I94124ADI extended IO pins on connectors.
Figure 2.4-1 I94124ADI IO Extension Connectors

I94124_NAU88C22_MB
July 30, 2020 Page 11 of 22 Rev 1.0
Table 2-1 I94124ADI IO Extension Interface Connector J8
Header I94100ADI Header I94100ADI
Pin No. Pin Name Pin No Pin Name
J8
J8.1 - GND
J8
J8.2 - VDD33
J8.3 1 PB.0 J8.4 2 PB.1
J8.5 3 PB.2 J8.6 4 PB.3
J8.7 5 PB.4 J8.8 6 nRESET
J8.9 - NC J8.10 - NC
J8.11 9 PB.7 J8.12 10 PB.8
J8.13 11 PB.9 J8.14 12 LDO_CAP
J8.15 13 VSS J8.16 14 AVSS
J8.17 15 VDD33 J8.18 16 AVDD
Table 2-2 I94124ADI IO Extension Interface Connector J5
Header I94100ADI Header I94100ADI
Pin No. Pin Name Pin No Pin Name
J5
J5.18 - NC
J5
J5.17 - NC
J5.16 19 PC.2 J5.15 20 PC.3
J5.14 21 PC.4 J5.13 22 PC.5
J5.12 23 PC.6 J5.11 24 PC.7
J5.10 25 PC.8 J5.9 26 PC.9
J5.8 27 PC.10 J5.7 28 PC.11
J5.6 29 PC.12 J5.5 30 PC.13
J5.4 31 PC.14 J5.3 32 USB_VDD33
J5.2 - GND J5.1 - VDD33

I94124_NAU88C22_MB
July 30, 2020 Page 12 of 22 Rev 1.0
Table 2-3 I94124ADI IO Extension Interface Connector J4
Header I94124ADI Header I94124ADI
Pin No. Pin Name Pin No Pin Name
J4
J4.18 - GND
J4
J4.17 - VDD33
J4.16 33 PB.15 J4.15 - NC
J4.14 - NC J4.13 36 PD.0
J4.12 37 PD.1 J4.11 38 PD.2
J4.10 39 PD.3 J4.9 40 PD.4
J4.8 41 PD.5 J4.7 42 PD.6
J4.6 43 PD.7 J4.5 44 PD.8
J4.4 45 PD.9 J4.3 46 PD.13
J4.2 47 PD.14 J4.1 48 PD.15
Table 2-4 I94124ADI IO Extension Interface Connector J7
Header I94124ADI Header I94124ADI
Pin No. Pin Name Pin No Pin Name
J7
J7.1 49 PA.0
J7
J7.2 50 PA.1
J7.3 51 PA.2 J7.4 52 PA.3
J7.5 53 PA.4 J7.6 54 PA.5
J7.7 55 PA.6 J7.8 56 PA.7
J7.9 57 PA.8 J7.10 58 PA.9
J7.11 59 PA.10 J7.12 60 PA.11
J7.13 61 PA.12 J7.14 62 PA.13
J7.15 63 PA.14 J7.16 64 PA.15
J7.17 - GND J7.18 - VCC

I94124_NAU88C22_MB
July 30, 2020 Page 13 of 22 Rev 1.0
2.5 System Configuration
2.5.1 Power Source
J1: NuLink interface.
CN1:USB interface with VBUS power.
J2: power jack for DC IN(VBAT), requires 4.5V~5.0V.
Power
Source Component Comment
ICE_5V J1 Power pin on J1 for the power from Nu-Link (this board
requires 5V)
USB_5V CN1 Power pin on CN1 to supply 5V power from PC Host VBUS.
DC IN(VBAT) J2 Power pin of J2 for DC or battery power input
2.5.2 3.3V LDO
U3: The voltage regular converts the 5V source to 3.3V and supplies it to I94100 and
NAU88C22 on board.
Power
Source Component Comment
VDD_3V3 U3 LDO output 3.3V to supply I94100ADI platform board.
2.5.3 USB Connector
CN1: USB interface connector.
2.5.4 IO Extension Connectors
J4, J5, J7 and J8: IO extension connectors.
2.5.5 Push-Buttons
SW1: Reset button to reset I94100ADI.
SW2: Button for user definition.
2.5.6 LED
D3: Indicates I94124_NAU88C22_MB board powered up.
D4: For user application.
2.5.7 Power Connectors
SP1: Jumper for providing the power from J1/J2/CN1 to LDO.

I94124_NAU88C22_MB
July 30, 2020 Page 14 of 22 Rev 1.0
2.5.8 Clock Source
X1: 12.288 MHz crystal.
X2: 32.768 kHz crystal.
2.5.9 Nu-Link Interface
J1: Nu-Link interface for I94124.
2.5.10 SPI Flash interface
J3: SPI Flash Interface.
2.5.11 Others
J9: UART Interface of I94124ADI
J6: Jumper to allow I2S data out from NAU88C22 to I94124.
LS1: NAU88C22 Speaker out.
J12: AUXIN of NAU88C22YG.
J13: NAU88C22YG headphone out.

I94124_NAU88C22_MB
July 30, 2020 Page 15 of 22 Rev 1.0
2.6 Components Placement
and show the front and rear placement of I94124_NAU88C22_MB board.
Figure 2.6-1 I94124_NAU88C22_MB Front Placement
Figure 2.6-2 I94124_NAU88C22_MB Rear Placement

I94124_NAU88C22_MB
July 30, 2020 Page 16 of 22 Rev 1.0
and show the front and rear placement of I94124_MB_NAU85L40_NR board.
Figure 2.6-3 I94124_MB_NAU85L40_NR Front Placement
Figure 2.6-4 I94124_MB_NAU85L40_NR Rear Placement
Figure 2.6-5 and Figure 2.6-6 show the front and rear placement of I94124_MB_DMIC board.
Figure 2.6-5 I94124_MB_DMIC Front Placement
Figure 2.6-6 I94124_MB_DMIC Rear Placement

I94124_NAU88C22_MB
July 30, 2020 Page 17 of 22 Rev 1.0
3 I94124ADI EVB SCHEMATICS
This chapter contains the schematics for I94124_NAU88C22_MB (I94124ADI+NAU88C22YG Main
board) and I94124_MB_NAU85L40_NR (NAU85L40+MEMS AMIC Daughter card) &
I94124_MB_DMIC (I94124ADI MEMS DMIC Daughter card)
3.1 I94124_NAU88C22_MB
Figure 3.1-1 shows the I94124ADI, Pin Headers, Buttons and LED.
Figure 3.1-1 I94124_NAU88C22_MB circuit (1/2) I94124 part
PD0 SCL P1
PD1 SDA P1
PD2
X2
32.768K
XTAL-3.4MM-2P_1
PD5
PD4
PD6
PD3
I2S0_MCLK P1
I2S0_DO P1
I2S0_BCLK P1
I2S0_FSYNC P1
I2S0_DI P1
I2C & I2S
X32_OUT PC0
C42
4.7uF
R6
NC
C13 20pF
C14 20pF
X32_IN PC1
VDD33 VDD33
ICE_DAT
PD9 ICE_CLK
PD8
J1
CON5
1
2
3
4
5nRESET
ICE_5V
Nu_Link Dongle ICE
Interface
12
D4
RED
R34
560R
VDD33
PB0
CN1
mini USB 5pin
USB_MINI_B
GND
5NC
4DP
3DM
2VCC
1SHIELD 6
SHIELD 7
SHIELD 8
SHIELD 9
R8 27R
R7 27R
USB_5V
L1
L0805
USB_VBUS PB15
USBD- PB14
USB MIni
USBD+ PB13
TP1 TP4
TP2 TP3
I94124PDI Power Supply
C17
0.1uF
LDO_CAP
C23
1uF
VDD_3V3
R14 0R
R11 0R
R16 0R
C19
1uF
C20
0.1uF
C21
1uF
C22
0.1uF
C18
1uF
TP5
VDD_3V3 TP6 TP7
Power Supply
Title
Size Document Number Rev
Date: Sheet of
I94124PDI_MB C
I94124_NAU88C22_MB_REVC
A3
1 2Wednesday, January 02, 2019
USB_VDD33
VDD33
AVDD33
R12
4.7K
R13
4.7K
VDD33
nRESET
VDD33
Reset
SW1
RESET C16
10uF
3216
R9
10K
R0603
PD15
PD14
PD13
PD9
PD8
PD7
PD6
PD4
PB15
PD3
PD5
PB13
PD2
PD0
PD1
PB14
PB6
VDD33
PB0
GND
PB7
PB9
PB1
PB3
GND
LDO_CAP
PB2
AVDD33
PB8
PB4
nRESET
PB5
PA8
PA15
PA1
PA5
PA14
PA7
PA2
PA12
PA3
PA13
PA4
PA6
PA11
PA0
PA10
PA9
PC14
PC0
PC7
PC1
PC13
PC12
PC2
PC10
PC8
USB_VDD33
PC4
PC3
PC11
PC9
PC5
PC6
U1
I94124PDI_LQFP64_7x7
PB.0
1
PB.1
2
PB.2
3
PB.3
4
PB.4
5
nRESET
6
PB.5
7
PB.6
8
PB.7
9
PB.8
10
PB.9
11
LDO_CAP
12
VSS
13
AVSS
14
VDD
15
AVDD
16
PC.0
17
PC.1
18
PC.2
19
PC.3
20
PC.4
21
PC.5
22
PC.6
23
PC.7
24
PC.8
25
PC.9
26
PC.10
27
PC.11
28
PC.12
29
PC.13
30
PC.14
31
USB_VDD33
32
PB.15 33
PB.14 34
PB.13 35
PD.0 36
PD.1 37
PD.2 38
PD.3 39
PD.4 40
PD.5 41
PD.6 42
PD.7 43
PD.8 44
PD.9 45
PD.13 46
PD.14 47
PD.15 48
PA.0 49
PA.1 50
PA.2 51
PA.3 52
PA.4 53
PA.5 54
PA.6 55
PA.7 56
PA.8 57
PA.9 58
PA.10 59
PA.11 60
PA.12 61
PA.13 62
PA.14 63
PA.15 64
12
D3
GREEN
VDD33
R15
1.2K
J10
12
PWR_ON
VDD_3V3
VDD_3V3
C3
0.1uF
C2
10uF
C4
10uF
PA15
C1
0.1uF
SW2
PushButton
U3 SP1117M3-3.3V
GND
1
VOUT 2
VIN
3
VOUT 4
VDD33
Push Button
VDD_5V
R10
10K
R0603
12
D1 SS24A
J2
12
ICE_5V
Battery
AAA*3
USB_5V
12
D2 SS24A
J4
CON18A
1
23
65
4
7
89
10 11
12 13
14 15
16 17
18 J5
CON18A
1
23
65
4
7
89
10 11
12 13
14 15
16 17
18
J7
CON18A
1
23
65
4
7
89
10 11
12 13
14 15
16 17
18
PC3
J8
CON18A
1
23
65
4
7
89
10 11
12 13
14 15
16 17
18
PC5
PC7
PC9
PC11
PC13
USB_VDD33
VDD33
PB2
PB7
GND
VDD33
PB0
GND
PB4
PB9
PC12
PC6
PC2
PC8
PC14
PC4
GND
PC10
PB3
PB8
GND
AVDD33
PB1
VDD33
nRESET
PD8
VDD_5V
SP1 1
2
PD2
VDD33
PD13
PD4
PD0
PD15
PD6
PA4
PA10
PA14
GND
PA8
PA2
PA12
PA0
PA6
PD7
PD1
PB15
GND
PD3
PD9
PD14
PD5
PA5
PA11
PA15
VDD33
PA9
PA3
PA13
PA1
PA7
SPI0_CLKPC12
Serial Flash
SPI0_MOSI0
PC10
VDD33
SPI0_MISO0 PC11
C15
0.1uF
SPI0_SS0 PC7 U2
W25Q16BV - DNP
/CS
1
D0(IO1)
2
/WP(IO2)
3
GND
4
VCC 8
/HLD(IO3) 7
CLK 6
DI(IO0) 5
J3
CON7
1
2
3
4
5
6
7
M1 M2 M3 M4
SPI0_CLK
SPI0_MOSI0
SPI0_MISO0
SPI0_SS0
nRESET
VDD33
UART_TXD
PB8
UART_RXDPB9
J9
12
UART Interface
Crystal
XTAL_OUT PB5
R5
NC
C11 20pF
C12 20pF
4-24MHz Crystal
(Close to the pins)
X1
12.288MHz
XTAL\LP\SMD
XTAL_IN PB6
SPI Flash Interface
3
4
SP1117
1 2
DMIC Daughter Board Interface
PA3 DMIC_CLK1
DMIC_CLK0 PA1 PA2 DMIC_DATA1
DMIC_DATA0 PA0
VDD_1V8 VDD_1V8

I94124_NAU88C22_MB
July 30, 2020 Page 18 of 22 Rev 1.0
Figure 3.1-2 shows the NAU88C22 related circuit
Figure 3.1-2 I94124_NAU88C22_MB circuit (2/2) NAU88C22 part
LS1
SPEAKER
J12
PHONEJACK STEREO
1
2
3
R23
0R
R21
10K/NC
PJ30130
R22
10K/NC
SDA P1
SCL P1
PD1
PD0
PD3
PD6
PD4
PD5
PD2
I2S0_BCLK P1
I2S0_DO P1
I2S0_MCLK P1
I2C & I2S
I2S0_DI P1
I2S0_FSYNC P1
R33
0R
C33 1uF
C35 1uF
AUXIN
R24 47R
R25 47R
C40
33pF
C41
33pF
3CM
SDA P1
SCL P1
R26 10R
R27 27R
R28 27R
R29 27R
R30 27R
88C22_DI
I2S0_MCLK P1
I2S0_DO P1
I2S0_BCLK P1
I2S0_FSYNC P1
C36
4.7uF
C37
0.1uF
C39
4.7uF
C38
0.1uF
VDDC
VDDB
J13
PHONEJACK STEREO
1
2
3
C43 100uF/6.3V
C44 100uF/6.3V
LHP
RHP
PJ30130
R31
10K
R32
10K Headphone
MIC1
MICROPHONE
1
2
MIC2
MICROPHONE
1
2
C30 4.7uF
C31 4.7uF
C32 4.7uF
C34 4.7uF
R19
2.2K R20 2.2K
C26 4.7uF
C28
0.1uF
C29
10uF
VDDSPK
VREF
J6 1
2I2S0_DI P1
C24
4.7uF
C25
0.1uF
R17
2.2K R18 2.2K
C27
4.7uF
MICBIAS
VDDA
Title
Size Document Number Rev
Date: Sheet of
NAU88C22YG C
I94124_NAU88C22_MB_REVC
A4
2 2Wednesday, January 02, 2019
L2 600R
1 2
L3 600R
1 2
VDD_3V3 VDDA
VDD33 VDDB
L4 600R
12
VDDC
VDD33
L5 600R
1 2
VDDSPK
VDD_5V
U5
NAU88C22YG
LMICP
1
LMICN
2
LLIN/GPIO2
3
RMICP
4
RMICN
5
RLIN/GPIO3
6
FS
7
BCLK
8
ADCOUT
9
DACIN
10
MCLK
11
VSSD
12
VDDC
13
VDDB
14
CSB/GPIO1
15
SCLK
16
SDIO 17
MODE 18
LAUXIN 19
RAUXIN 20
AUXOUT1 21
AUXOUT2 22
RSPKOUT 23
VSSSPK 24
LSPKOUT 25
VDDSPK 26
VREF 27
VSSA 28
RHP 29
LHP 30
VDDA 31
MICBIAS 32
EPAD 33

I94124_NAU88C22_MB
July 30, 2020 Page 19 of 22 Rev 1.0
3.2 I94124_MB_NAU85L40_NR
W
Figure 3.2-1 I94124_MB_NAU85L40_NR Circuit
PD15
PD14
I2C1_SDA P1
I2C1_SCL P1
PD1
PD7
J1
CON18A
1
23
65
4
7
89
10 11
12 13
14 15
16 17
18
PD14
PB13
PD3
PD9
GND
PB15
VDD33
PB14
PD2
PD8 PD5
PD0
PD6
PD15
PD13
PD4
R12
10K
R13
10K
VDDB
VDD33
PD13 R29 330R
12
D2
BLUE
J2
CON18A
1
23
65
4
7
89
10 11
12 13
14 15
16 17
18
PC9
PC1
PC3
PC7
PC13 PC12
PC11
VDD33
PC5
USB_VDD33 PC14
PC8
PC0
PC2
PC6
PC10
GND
PC4 PC5
PC2
PC3
R28 330R
PC6
PC4
PC13
PC9
PC8
PC14
a
g
c
d
e
fb
.dp
U2
XSM-S3111B
A
1
F
2
G
3
E
4
D
5DP 6
77
C8
99
B10
Title
Size Document Number Rev
Date: Sheet of
NAU85L40YG & MIC MEMS ANALOG C
I94124_MB_NAU85L40_NR_REVC
B
1 1Wednesday, January 02, 2019
J4
HEADER 1
1
C30
0.1uF
VDD_1V8
C29
10uF
C28
10uF
U4 SP1117M3-1.8V
GND
1
VOUT 2
VIN
3
VOUT 4
VDD_3V3
PD6
PD4
PD2
I2S0_BCLK P1
I2S0_MCLK P1
PD3
I2S0_DI P1
I2S0_FSYNC P1
I2C & I2S
U1
NAU85L40YG
MIC4P/LIN4
1
MIC4N
2
VREF
3
MICREF
4
VDDC
5
VSSD
6
VDDB
7
MCLKO
8
DO34/TDM
9
DO12
10
BCLK
11
FS
12
MCLKI
13
CSB
14
MIC1P/LIN1 21
MIC1N 20
VSSA 19
VDDA 18
MODE 17
SDA 16
SCL 15
MIC3N 28
MIC3P/LIN3 27
MICBIAS2 26
MICVDD 25
MICBIAS1 24
MIC2P/LIN2 23
MIC2N 22
EPAD 29
3
I2C1_SDA P1
I2C1_SCL P1
PD15
PD14
C19
2.2uF
C18
4.7uF
1
SP1117
4
VREF
2
VSSA
VSSA VSSA
MICREF
VSSA
VSSA
VSSA
VSSA VSSA
C20
4.7uF
VSSA
VSSA
VSSA
C21
0.1uF
VSSA
C23
4.7uF
C24
0.1uF
VDDC
VSSA
85L40_SDA
VSSA VSSA
C25
33pF
R15 47R
C26
33pF
MIC2P
MIC4N
MIC3N
MIC3P
MIC1P
VDDB
VDDA
MIC2N
MIC1N
85L40_SCL
MIC4P
R11
10K
VDD
DI
MICVDD
C1
0.1uF
VSSA MIC1P
BCLK
MIC1
MSM381A3526H9HP-E
OUT
4GND
5GND 2
GND 1
GND 3
VDD
6
VSSA
LRCLK R20 33R
R19 33R
R22 33R
PD6
PD3
CSB
R3 0R
R17 0R
R4 0R
C15
4.7uF
VDDB
MICVDD
C14
0.1uF
R6 0R
R5 0R VDDC
VDDA
C13 1uF
LED Display
C16 1uF
MIC2
MSM381A3526H9HP-E
OUT
4GND
5GND 2
GND 1
GND 3
VDD
6
VDD
C7
0.1uF
VSSA VSSA
MIC2P
R21 0R
C12 1uF
C9 1uF
R23 0R/NC
VDD_1V8
VDD33
VDD_1V8
C6 1uF
VDD33
C4 1uF
C8 1uF
WORK
C5 1uF
C27
0.1uF
R2 0R
VSSA
R1 0R GND
C11
4.7uF
C10
0.1uF
MIC4P
MIC1N
MIC1P MIC3P
MIC2P
MIC1P
MIC2N
MIC3P
MIC2P MIC3N
MIC4P MIC4N
MIC3N
MIC1N
MIC2N
MIC4N
VDD
VSSA
ICON1
HEADER5X2/2.54mm_M
2
4
6
8
10
1
3
5
7
9
Close the MICROPHONE
J5
HEADER 1
1
VSSA
J6
PHONEJACK STEREO
1
2
3
R26
0R
MIC3P_LINE
MIC4P_LINE
R25
47K
PJ30130
R27
47K
R14 47R
VSSA
VSSA
VSSA
PD2
R18 33R
MCLK
R7
0R
R8
0R
R9
0R
R10
0R VSSA
C2
4.7uF
C3
4.7uF
VSSA
I2C1_SDA
I2S0_FSYNC
I2S0_BCLK
I2S0_DI
I2C1_SCL
VDDB
a
g
c
d
e
fb
.dp
U3
XSM-S3111B
A
1
F
2
G
3
E
4
D
5DP 6
77
C8
99
B10
R30 330R
PD7
VDD
C17
0.1uF
VSSA
VSSA MIC3P_A
MIC3
MSM381A3526H9HP-E
OUT
4GND
5GND 2
GND 1
GND 3
VDD
6
MIC4
MSM381A3526H9HP-E
OUT
4GND
5GND 2
GND 1
GND 3
VDD
6
VDD
C22
0.1uF
VSSA VSSA
MIC4P_A
M3
M1 M2 M4
TP1
PAD_62R42
J8
CON3
1
2
3
J9
CON3
1
2
3
MIC3P_LINE
MIC3P
MIC3P_A
MIC4P_LINE
MIC4P
MIC4P_A
R16 0R/NC
VDDB
I2S0_MCLK
J7
12PD4

I94124_NAU88C22_MB
July 30, 2020 Page 20 of 22 Rev 1.0
3.3 I94124_MB_DMIC
J1
CON18A
12 3
6 5
4
7
8910 1112 1314 15
16 1718
PA3 DMIC_CLK1
PA0DMIC_DATA0 PA2DMIC_DATA1 PA1 DMIC_CLK0
VDD33
DATA0
DMIC_CLK1 PA3
PA2DMIC_DATA1
PA1DMIC_CLK0
DMIC_DATA0 PA0
1. U1-U4 are for DMIC with MSM261D4030H1CPM.
2. any time, only two DMICs can be populated
3. DMICs' position: on a line, DMIC#1 is at 0,
DMIC#2 is 20 mm from DMIC#1; DMIC#3 is 50mm
from DMIC#2; DMIC#4 is 30mm from DMIC#3.
U2U1 U4U3
component placement suggestion:
R2 0CLK0
R3 0
R4 0
DATA1
R1 0
CLK1
50mm
20mm 30mm
J2
CON18A
12 3
6 5
4
78 9
10 1112 1314 15
16 1718
VDD33
VDD33
U1
MSM261D4030H1CPM
VDD
1
L/R
2CLK 3
DATA 4
GND
5
GND
6GND 7
GND 8
VDD33
C2
0.1uF
CLK0
DATA0
C1
10uF
U2
MSM261D4030H1CPM
VDD
1
L/R
2CLK 3
DATA 4
GND
5
GND
6GND 7
GND 8
VDD33
C4
0.1uF
CLK0
DATA0
C3
10uF
U3
MSM261D4030H1CPM
VDD
1
L/R
2CLK 3
DATA 4
GND
5
GND
6GND 7
GND 8
VDD33
C6
0.1uF
CLK1
DATA1
C5
10uF
U4
MSM261D4030H1CPM
VDD
1
L/R
2CLK 3
DATA 4
GND
5
GND
6GND 7
GND 8
VDD33
C8
0.1uF
CLK1
DATA1
C7
10uF
DMIC Daughter Board Interface
Title
Size Document Number Rev
Date: Sheet of
I94124_MB_DMIC_REVC C
I94124_NAU88C22_MB_REVC
A4
1 1Wednesday , January 02, 2019
Figure 3.3-1 I94124_MB_DMIC Circuit