Product Manual

WB3S Datasheet

Note:

1. P indicates power supply pins, I/O indicates input/output pins, and AI indicates

analog input pins.

2. CEN is only a hardware reset pin and cannot clear the Wi-Fi network configuration.

3. UART1 is a user-side serial interface pin, which generates information when the

module is powered on and starts.

2.3 Test Pin Definition

Table 2-2 WB3S test pins

Pin No. Symbol

I/O Type Function

N/A SO I/O Data output pin when data is downloaded from

the flash memory, which is used for module

production and firmware burning and

is connected to the P23 or ADC3 pin on the

internal IC

N/A SI I/O Data input pin when data is downloaded from

the flash memory, which is used for module

production and firmware burning and

is connected to the P22 pin on the internal IC

N/A CS I/O Chip selection pin when data is downloaded

from the flash memory, which is used for

module production and firmware burning and

is connected to the P21 pin on the internal IC

N/A SCK I/O Clock pin when data is downloaded from the

flash memory, which is used for module

production and firmware burning and is

connected to the P20 pin on the internal IC

Note:

Test pins are not recommended.