WRG1 Wi-Fi Module

Wi-Fi Module — WRG1

1. Product Overview

Module interface

2.1 Dimensions and Pin Layout

WRG1 provides three rows of pins with the distance of 1.5 mm between every two pins. WRG1 size: 19 mm (W) x 25.7 mm (L) x 3.3 mm (H) ​ Figure 2.1 Top view of WRG1 2.pngFigure 2.2 Bottom view of WRG1 3.png

2.2 Pin Definition

Figure 2.3 and Figure 2.4 illustrate the interface pin layout. 4.png 5.png

2.3 Pin Definition

Table 1 describes the interface pins. ​ Table 1 WRG1 interface pins

No. Symbol I/O Type Functions
1 GND P Power supply reference ground pin
2 SWD_TMS AI GPIOE_3 and JTAG_TMS, which can be used as a JLINK programming pin
3 E_2 I GPIOE_2. If E3 or E4 is configured as a JTAG pin, this pin cannot be configured as a GPIO.
4 SWD_CLK I/O GPIOE_4 and JTAG_CLK, which can be used as a JLINK programming pin
5 I2C2_SDA I/O GPIOE_1. If E3 or E4 is configured as a JTAG pin, this pin cannot be configured as a GPIO.
6 I2C2_SCL I/O GPIOE_0. If E3 or E4 is configured as a JTAG pin, this pin cannot be configured as a GPIO.
7 ADC AI 16-bit precision ADC
8 EN P Module enablement pin. For normal use, this pin needs to be connected to 3.3 V power supply. Pull-up resistors have been added to the module, and therefore, there is no need to increase the pull-up resistors.
9 GND P Power supply reference ground pin
10 Rts I/O GPIOA_3, a Require To Send pin. If A6 or A7 is configured as a UART0, this pin cannot be configured as a GPIO.
11 Rx I/O GPIOA_6 and UART0_Rx, which is used for user communication
12 Cts I/O GPIOA_5, a Clear To Send pin. If A6 or A7 is configured as a UART0, this pin cannot be configured as a GPIO.
13 Tx I/O GPIOA_7 and UART0_Tx, which is used for user communication
14 C_3 I/O GPIOC_3, hardware PWM3
15 C_2 I/O GPIOC_2, hardware PWM2
16 GND P Power supply reference ground pin
17 3.3V P Power-supply pin of WRG1 (typical power supply voltage: 3.3 V)
18 C_1 I/O GPIOC_1, hardware PWM1
19 C_0 I/O GPIOC_0, hardware PWM0
20 I2C1_SDA I/O GPIOC_4, which can be configured as an I2C or a GPIO
21 I2C1_SCL I/O GPIOC_5, which can be configured as an I2C or a GPIO
22 Log_Tx I/O GPIOB_0 and Log Tx, which is used to print serial port information
23 Log_Rx I/O GPIOB_1 and Log Rx, which is used to print serial port information
24 I2C3_SCL I/O GPIOB_2, which can be configured as an I2C or a GPIO
25 I2C3_SDA I/O GPIOB_3, which can be configured as an I2C or a GPIO

Note: P indicates power-supply pins, I/O indicates input/output pins, and AI indicates analog input pins.

(1): This pin can only be used as an ADC interface and cannot be used as a common I/O pin. If this pin is not used, it must be disconnected.

When this pin is used as the ADC input interface, the input voltage range must be 0 V to 3.3 V.

(2): UART0 is a user serial port. When WRG1 is powered on, information is displayed through the serial port, and the information can be ignored.

3. Electrical Parameters

3.1 Absolute Electrical Parameters

Table 3.1 Absolute electrical parameters

Parameter Description Minimum Value Maximum Value Unit
Ts Storage temperature -40 105
VDD Power-supply voltage -0.3 3.6 V
Static electricity voltage (human model) TAMB -25℃ - 2 kV
Static electricity voltage (machine model) TAMB -25℃ - 0.5 kV

3.2 Electrical Conditions

Table 3.2 Normal electrical conditions

Parameter Description Minimum Value Typical Value Maximum Value Unit
Ta Working temperature -20 - 85
VDD Working voltage 3.0 - 3.6 V
VIL I/O low-level input -0.3 - VDD x 0.25 V
VIH I/O high-level input VDD x 0.75 - 3.6 V
VOL I/O low-level output - - VDD x 0.1 V
VOH I/O high-level output VDD x 0.8 - VDD V
Imax I/O drive current - - 16 mA
Cpad Input pin capacitance - 2 - pF

4.1 Basic RF Features

Table 4.1 Basic RF features

Parameter Description
Frequency band 2.400 GHz to 2.4835 GHz
Wi-Fi standard IEEE 802.11 b/g/n (channels 1 to 14)
Data transmission rate 802.11b: 1, 2, 5.5, and 11 (Mbit/s) 802.11g: 6, 9, 12, 18, 24, 36, 48, and 54(Mbit/s) 802.11n: HT20 MCS0-7 802.11n: HT40 MCS0-7
Antenna type (Default) PCB antenna (Optional) External antenna of U.FL RF connector

Antenna Information

5.1 Antenna Types

WRG1 supports onboard PCB antenna and external antenna. By default, the onboard PCB antenna is used.

5.2 Antenna Interference Reduction

When you use an onboard PCB antenna on a Wi-Fi module, make sure that the antenna on the module is at least 15 mm away from other metal parts to ensure optimal wireless performance.

5.3 U.FL RF Connector

Figure 5.3 shows the U.FL RF connector parameters.

400 Call

Consult

400-881-8611