TUYA WBR3L Manual de usuario
Contents
Contents
1 Product Overview 1
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Change History 3
3 Module Interfaces 3
3.1 Dimensions and Footprint . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4 Electrical Parameters 6
4.1 Absolute Electrical Parameters . . . . . . . . . . . . . . . . . . . . . 6
4.2 Working Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.3 RF Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4 Working Power Consumption . . . . . . . . . . . . . . . . . . . . . . 8
5 RF Parameters 9
5.1 Basic RF Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 TX Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.3 RX Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Antenna Information 12
6.1 Antenna Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 Antenna Interference Reduction . . . . . . . . . . . . . . . . . . . . . 12
7 Power-on Sequence and Resetting 13
7.1 Power-on Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
7.2 Resetting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8 Packaging Information and Production Instructions 15
8.1 Mechanical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.2 Recommended PCB Layout . . . . . . . . . . . . . . . . . . . . . . . 16
8.3 Pin Header Specifications . . . . . . . . . . . . . . . . . . . . . . . . 18
8.4 Production Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.5 Recommended Oven Temperature Curve . . . . . . . . . . . . . . . . 21
i
1 PRODUCT OVERVIEW
1 Product Overview
WBR3L is a low-power embedded WiFi+BLE module that Tuya has developed. It
consists of a highly integrated wireless RF chip (RTL8720CF), with an embedded
WiFi network protocol stack and varied library functions. With the maximum CPU
clock rate of 100MHz, WBR3L also contains a low-power KM4 microcontroller unit
(MCU), a WLAN MAC, a 1T1R WLAN module, 256-KB static random-access memory
(SRAM), 2-MB flash memory, and extensive peripherals. WBR3L is an RTOS platform
that integrates all function libraries of the WiFi MAC and TCP/IP protocols. You can
develop embedded WiFi products as required.
1.1 Features
1. Embedded low-power KM4 MCU, which can also function as an application pro-
cessor; Clock rate: 100MHz
2. Working voltage: 3.0 to 3.6 V
3. Peripherals: 9 GPIOs, 1 universal asynchronous receiver/transmitter (UART),
and 1 log transmitter
4. WiFi/BT connectivity
• 802.11 B/G/N20
• Channels 1 to 14 at 2.4 Ghz (channels 1 to 11 for US/CA and channels 1 to
13 for EU/CN)
• Support WEP/WPA/WPA2/WPA2 PSK（AES）security modes
• Support BLE (Bluetooth Low Energy) 4.2
• Up to +20 dBm output power in 802.11b mode
• Support SmartConfig functions for Android and iOS devices
• Onboard PCB antenna
• Passed CE and FCC certification
• Working temperature: -20℃ to 105℃
1.2 Applications
• Intelligent building
• Smart household and home appliances
• Smart socket and light
• Industrial wireless control
1 / 25
1 PRODUCT OVERVIEW
• Baby monitor
• Network camera
• Intelligent bus
2 / 25
3 MODULE INTERFACES
2 Change History
Serial Number Update Date Updated Content
Version after
Update
1 3/21/2020 This is the first
release.
V1.0.0
3 Module Interfaces
3.1 Dimensions and Footprint
WBR3L has two rows of pins with a 2 mm pin spacing. Each row has 8 pins. The
WBR3L dimensions are 16±0.35 mm (W)×24±0.35 mm (L) ×2.9±0.15 mm (H). The
dimensions of WBR3L are as follows:
3 / 25
3 MODULE INTERFACES
3.2 Pin Denition
The definition of interface pins is shown in the following table:
Pin Number Symbol I/O Type Function
1 NC / It is pulled up to
be compatible
with other
modules
2 A_7 I/O GPIOA_7,
hardware PWM, IC
Pin 21
3 EN I/O Enabling pin,
which works at
the high level and
is pulled up and
controlled by a
user externally
4 A_11 I/O GPIOA_11,
hardware PWM, IC
Pin 25
5 A_2 I/O GPIOA_2,
hardware PWM, IC
Pin 18
6 A_3 I/O GPIOA_3,
hardware PWM, IC
Pin 19
7 A_4 I/O GPIOA_4,
hardware PWM, IC
Pin 20
8 VCC P Power supply pin
(3.3V)
9 GND P Power supply
reference ground
4 / 25
3 MODULE INTERFACES
Pin Number Symbol I/O Type Function
10 A_12 I/O GPIOA_12,
hardware PWM, IC
Pin 26
11 A_16 I/O GPIOA_16,
UART_Log_TXD,
which is used for
displaying the
module internal
information and
can be configured
as a common
GPIO
12 A_17 I/O GPIOA_17,
hardware PWM, IC
Pin 38
13 A_18 I/O GPIOA_18,
hardware PWM, IC
Pin 39
14 A_19 I/O GPIOA_19,
hardware PWM, IC
Pin 40
15 RXD I/O GPIOA_13,
UART0_RXD,
which is used as a
user-side serial
interface pin
16 TXD I/O GPIOA_14,
UART0_TXD,
which is used as a
user-side serial
interface pin
Note: P indicates power supply pins and I/O indicates input/output pins.
5 / 25
4 ELECTRICAL PARAMETERS
4 Electrical Parameters
4.1 Absolute Electrical Parameters
Parameter Description
Minimum
Value
Maximum
Value Unit
Ts Storage
temperature
-40 125 ℃
VDD Power supply
voltage
-0.3 3.6 V
Static
electricity
discharge
voltage
(human body
model)
TAMB-25℃ - 2 KV
Static
electricity
discharge
voltage
(machine
model)
TAMB-25℃ - 0.5 KV
4.2 Working Conditions
Parameter Description
Minimum
Value
Typical
Value
Maximum
Value Unit
Ta Working
tempera-
ture
-20 - 105 ℃
VDD Working
voltage
3.0 - 3.6 V
6 / 25
4 ELECTRICAL PARAMETERS
Parameter Description
Minimum
Value
Typical
Value
Maximum
Value Unit
VIL I/O
low-level
input
- - 0.8 V
VIH I/O
high-level
input
2.0 - - V
VOL I/O
low-level
output
- - 0.4 V
VOH I/O
high-level
output
2.4 - - V
Imax I/O drive
current
- - 16 mA
Cpad Input pin
capaci-
tance
- 2 - pF
4.3 RF Power Consumption
1. TX power consumption:
Symbol Mode
Average
Value
Peak Value
(Typical
Value) Unit
IRF 11B 11M 63 65 mA
IRF 11G 54M 65 67 mA
IRF 11N HT20
MCS7
65 67 mA
2. RX power consumption:
7 / 25
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