Hangzhou Tuya Information Technology WBR3 User Manual
WBR3 Datasheet
Tuya WBR3 Wi-Fi and Bluetooth
Version: 2.0.0
Date: 2019-10-21
No.: 0000000001
Product
Manual
Global Intelligent Platform
1. Product Overview
WBR3 is a low-power embedded Wi-Fi and Bluetooth module that Tuya has developed. It
consists of a highly integrated RF chip (RTL8720CF) with an embedded Wi-Fi network
protocol stack and robust library functions. WBR3 also contains a low-power KM4
multipoint control unit (MCU), WLAN MAC, 1T1R WLAN, 256 KB static random-access
memory (SRAM), and 2 MB flash memory, and has extensive peripherals.
WBR3 is an RTOS platform that integrates all function libraries of the Wi-Fi MAC and
TCP/IP protocols. You can develop embedded Wi-Fi products as required.
Figure 1-1 shows the WBR3 architecture.
Figure 1-1 WBR3 architecture
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WBR3 Datasheet
1.1 Features
Embedded low-power KM4 MCU, which can also function as an application processor
Clock rate: 100 MHz
Working voltage: 3.0 V to 3.6 V
Peripherals: nine GPIOs, one universal asynchronous receiver/transmitter (UART),
and one Log_TX pin
Wi-Fi connectivity
802.11b/g/n20
Channels 1 to 14 at 2.4 GHz
Compatible with Bluetooth low energy (BLE) 4.2(Up to +9dBm EIPR output
power)
WPA and WPA2 security modes
Up to +20 dBm EIRP output power in 802.11b mode
Smart network configuration for Android and iOS devices
Onboard PCB antenna
Certified by CE, FCC, and SRRC
Working temperature: –20°C to +85°C
1.2 Applications
Intelligent building
Smart household and home appliances
Smart socket and light
Industrial wireless control
Baby monitor
Network camera
Intelligent bus
2
Change History
No.
Date
Change Description
Version After
Change
1
2019-10-21
This is the first release.
2.0.0
WBR3 Datasheet
3
WBR3 Datasheet
Contents
1. Product Overview........................................................................................................................ 1
1.1 Features.............................................................................................................................. 2
1.2 Applications........................................................................................................................ 2
2 Module Interfaces......................................................................................................................... 6
2.1 Dimensions and Footprint................................................................................................6
2.2 Interface Pin Definition..................................................................................................... 6
3 Electrical Parameters................................................................................................................... 8
3.1 Absolute Electrical Parameters....................................................................................... 8
3.2 Electrical Conditions......................................................................................................... 8
3.3 RF Current Consumption................................................................................................. 9
3.4 Working Current.............................................................................................................. 10
4 RF Features.................................................................................................................................10
4.1 Basic RF Features.......................................................................................................... 10
4.2 TX Performance...............................................................................................................11
4.3 RX Performance.............................................................................................................. 11
5 Antenna Information................................................................................................................... 12
5.1 Antenna Type................................................................................................................... 12
5.2 Antenna Interference Reduction...................................................................................12
6 Packaging Information and Production Instructions.............................................................12
6.1 Mechanical Dimensions................................................................................................. 12
6.2 Recommended PCB Layout..........................................................................................14
6.3 Production Instructions...................................................................................................15
6.4 Recommended Oven Temperature Curve.................................................................. 17
6.5 Storage Conditions......................................................................................................... 18
7 MOQ and Packing Information.................................................................................................19
8 Appendix: Statement.................................................................................................................. 20
4
WBR3 Datasheet
Tables
Table 2-1 WBR3 interface pins...................................................................................................... 6
Table 3-1 Absolute electrical parameters.....................................................................................8
Table 3-2 Normal electrical conditions..........................................................................................8
Table 3-3 Power consumption during constant transmission................................................... 9
Table 3-4 Power consumption during constant receiving..........................................................9
Table 3-5 WBR3 working current................................................................................................ 10
Table 4-1 Basic RF features.........................................................................................................10
Table 4-2 Performance during constant transmission............................................................. 11
Table 4-3 RX sensitivity.................................................................................................................11
Figures
Figure 1-1 WBR3 architecture....................................................................................................... 1
Figure 2-1 WBR3 front and rear views......................................................................................... 6
Figure 6-1 WBR3 mechanical dimensions................................................................................ 13
Figure 6-2 Side view......................................................................................................................13
Figure 6-3 WBR3 pins...................................................................................................................14
Figure 6-4 Layout of the PCB to which WBR3 applies............................................................15
Figure 6-5 HIC for WBR3............................................................................................................. 16
Figure 6-6 Oven temperature curve........................................................................................... 17
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WBR3 Datasheet
Pin No.
Symbol
I/O Type
Function
1NCN/A
Disconnected to be compatible with other
modules
2
A_7
I/O
GPIOA_7, hardware PWM pin, which is
2 Module Interfaces
2.1 Dimensions and Footprint
WBR3 has two rows of 16 pins (2 x 8) with a 2 mm pin spacing.
The WBR3 dimensions (H x W x D) are 2.9±0.15 mm x 16±0.35 mm x 24±0.35 mm.
Figure 2-1 shows the WBR3 front and rear views.
2.2 Interface Pin Definition
Figure 2-1 WBR3 front and rear views
Table 2-1 WBR3 interface pins
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WBR3 Datasheet
Pin No.
Symbol
I/O Type
Function
connected to pin 21 on the internal IC
3ENI/O
Enable pin, which is active at a high level (The
pin has been pulled up and is externally
controllable.)
4
A_11
I/O
GPIOA_11, hardware PWM pin, which is
connected to pin 25 on the internal IC
5
A_2
I/O
GPIOA_2, hardware PWM pin, which is
connected to pin 18 on the internal IC
6
A_3
I/O
GPIOA_3, hardware PWM pin, which is
connected to pin 19 on the internal IC
7
A_4
I/O
GPIOA_4, hardware PWM pin, which is
connected to pin 20 on the internal IC
8
VCC
P
Power supply pin (3.3 V)
9
GND
P
Power supply reference ground pin
10
A_12
I/O
GPIOA_12, hardware PWM pin, which is
connected to pin 26 on the internal IC
11
A_16
I/O
GPIOA_16, UART_Log_TXD, which is used
for printing the module internal information and
can be configured as a common GPIO
12
A_17
I/O
GPIOA_17, hardware PWM pin, which is
connected to pin 38 on the internal IC
13
A_18
I/O
GPIOA_18, hardware PWM pin, which is
connected to pin 39 on the internal IC
14
A_19
I/O
GPIOA_19, hardware PWM pin, which is
connected to pin 40 on the internal IC
15
RXD
I/O
GPIOA_13, UART0_RXD (user-side serial
interface)
16
TXD
I/O
GPIOA_14, UART0_TXD (user-side serial
interface)
Note:
P indicates power supply pins, and I/O indicates input/output pins.
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