TUYA WBR3L Manuale utente

WBR3L Module Datasheet

Device Development > Cloud Module > WiFi&BT Dual Mode Module

Version: 20200812

Online Version

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

Contents

8.6 Storage Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

9 MOQ and Packaging Information 23

10 Appendix-Statement 23

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 Denition

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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