5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
Initial version based on BRD4166A Rev. D03
with following components not mounted:
- MEMS Microphone
- RGB LEDs
- Pressure Sensor
- UV/Ambient Light Sensor
- Hall-effect Sensor
- Air Quality / Gas Sensor
- IMU Sensor
EFR32 RF & Power 2
Board Function
Page
Title Page
1
Rev. Description
Revision History
Thunderboard Sense 2
A01
LEGAL NOTICE:
SILICON LABORATORIES INC. (“SILICON LABS”) AND/OR ITS LICENSORS DO NOT WARRANT THE ACCURACY
OR COMPLETENESS OF THIS SCHEMATIC OR ANY INFORMATION CONTAINED WITHIN THIS SCHEMATIC.
IT IS PROVIDED “AS-IS” FOR REFERENCE ONLY. SILICON LABS DOES NOT WARRANT THAT THIS DESIGN
WILL MEET THE SPECIFICATIONS, BE SUITABLE FOR YOUR APPLICATION OR FIT FOR ANY PARTICULAR
PURPOSE, OR WILL OPERATE IN YOUR IMPLEMENTATION. SILICON LABS AND ITS LICENSORS DO NOT
WARRANT THAT THE DESIGN IMPLIED IN THIS SCHEMATIC IS PRODUCTION-WORTHY. YOU SHOULD
COMPLETELY VALIDATE AND TEST YOUR DESIGN IMPLEMENTATION TO CONFIRM SYSTEM FUNCTIONALITY
FOR YOUR APPLICATION.
EFR32 Connections & Interfaces 3
MEMS Microphone & RGB LEDs 4
SPI & I2C Sensors 5
Debugger
Board Power & Board ID 7
6
EFR32MG12P332F1024GL125
Size
Designed
Revision
Sheet
of
Approved
Sheet Modified Date
Board Number
Board Name
Page Title
COPYRIGHT SILICON LABORATORIES INC. 2022 CONFIDENTIAL – SUBJECT TO TERMS OF USE
Tuesday, April 19, 2022
1 7
A3
Title Page
MAH RGU
A01
Thunderboard Sense 2
BRD4166C
Size
Designed
Revision
Sheet
of
Approved
Sheet Modified Date
Board Number
Board Name
Page Title
COPYRIGHT SILICON LABORATORIES INC. 2022 CONFIDENTIAL – SUBJECT TO TERMS OF USE
Tuesday, April 19, 2022
1 7
A3
Title Page
MAH RGU
A01
Thunderboard Sense 2
BRD4166C
Size
Designed
Revision
Sheet
of
Approved
Sheet Modified Date
Board Number
Board Name
Page Title
COPYRIGHT SILICON LABORATORIES INC. 2022 CONFIDENTIAL – SUBJECT TO TERMS OF USE
Tuesday, April 19, 2022
1 7
A3
Title Page
MAH RGU
A01
Thunderboard Sense 2
BRD4166C
PCB1
PCB4166A
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
RF Section
2.4 GHz matching network
Mounting Holes
Low Frequency Crystal
Power & Decoupling
Reset button
GND
GND
GND GND
GND
VMCU
GND
GND
GND
GND
GND
GND
RFVDD
GND
GND
PAVDD
VMCU
RFVDD PAVDD
GND
GND
GND
GND
GND GND
VMCU
GNDGND
GND GND
GND GND GND
EFR32_RESET
LFXTAL_P
LFXTAL_N
Size
Designed
Revision
Sheet
of
Approved
Sheet Modified Date
Board Number
Board Name
Page Title
COPYRIGHT SILICON LABORATORIES INC. 2022 CONFIDENTIAL – SUBJECT TO TERMS OF USE
Tuesday, April 19, 2022
2 7
A3
EFR32 RF & Power
MAH RGU
A01
Thunderboard Sense 2
BRD4166C
Size
Designed
Revision
Sheet
of
Approved
Sheet Modified Date
Board Number
Board Name
Page Title
COPYRIGHT SILICON LABORATORIES INC. 2022 CONFIDENTIAL – SUBJECT TO TERMS OF USE
Tuesday, April 19, 2022
2 7
A3
EFR32 RF & Power
MAH RGU
A01
Thunderboard Sense 2
BRD4166C
Size
Designed
Revision
Sheet
of
Approved
Sheet Modified Date
Board Number
Board Name
Page Title
COPYRIGHT SILICON LABORATORIES INC. 2022 CONFIDENTIAL – SUBJECT TO TERMS OF USE
Tuesday, April 19, 2022
2 7
A3
EFR32 RF & Power
MAH RGU
A01
Thunderboard Sense 2
BRD4166C
M2
2.2 MM
C4
220N
C10
1U
L4
742692004
1 2
SW3
PTS810
1
2
3
4
M1
2.2 MM
C7
4U7
C3
10P
C77
100N
L1
2N2
C1
1P5
L2
1N5
RF Analog Power
PA Power
Ground
RF I/ORF Crystal
EFR32MG12P332F1024GL125
U1B
HFXTAL_N
K1
HFXTAL_P
L1
PAVDD
M8
PAVDD
N8
PAVSS
M6
PAVSS
M7
RFVDD
J1
RFVDD
J2
RFVSS
H5
RFVSS
H6
RFVSS
H7
RFVSS
H8
RFVSS
H9
RFVSS
J5
RFVSS
J6
RFVSS
J7
RFVSS
J8
RFVSS
J9
RFVSS
K2
RFVSS
L2
RFVSS
M2
RFVSS
M3
RFVSS
M4
RFVSS
M5
RFVSS
N5
RFVSS
G7
RFVSS
E5
RFVSS
E6
RFVSS
E7
RFVSS
E8
RFVSS
E9
RFVSS
F5
RFVSS
F6
RFVSS
F7
RFVSS
F8
RFVSS
F9
RFVSS
G5
RFVSS
G6
RFVSS
G8
RFVSS
G9
2G4RF_ION
N6
NC
N1
NC
N3
NC
N4
NC
N2
2G4RF_IOP
N7
L5
4U7
R2
1R
C75
100N
C5
10P
C9
1U
ANT1
2450AT18D0100
GND
2
IN
1
GND
3
GND
4
C11
100N
R98
100R
C65
10U
C76
100N
X1
38.4 MHz
31
2
4
C14
100N
Reset
Ground
Digital Logic
Digital Regulator
DC/DC Regulator
Digital Supply
I/O Supply
Analog Supply
EFR32MG12P332F1024GL125
U1C
AREGVDD
A10
AVDD
B13
IOVDD
M12
IOVDD
B10
IOVDD
F2
IOVDD
F11
RESETN
M1
VREGVDD
A11
VREGSW
A12
VREGVSS
A13
VREGVSS
B11
VREGVSS
B12
BODEN
L10
DECOUPLE
A9
C6
NM
L6
742692004
1 2
C2
100P
L3
742692004
1 2
R110
0R
C13
10N
C20
1P0
X2
32.768 kHz
21
C8
10U
C12
1U