Product Manual

9
WBR3D Datasheet
Pin No.
Symbol
I/O Type
Function
11
GPIO2
Output
UART0_TXD (used to display the module
internal information)
12
GPIO0
I/O
GPIO_0 (used during module power-on
and initialization; use it with caution)
13
GPIO4
I/O
GPIO_04
14
GPIO5
I/O
GPIO_05
15
RXD0
I/O
UART0_RXD (See the following Note 3.)
16
TXD0
Output
UART0_TXD (See the following Note 3.)
Note:
1. P indicates power supply pins, I/O indicates input/output pins, and AI indicates
analog input pins. RST is only a hardware reset pin and cannot clear the Wi-Fi
network configuration.
2. This pin can only function as an ADC input and not a common I/O. If this pin is
not used, it must be disconnected. When this pin is used as the ADC input, the
input voltage range is 0 V to 1.0 V.
3. UART0 is a user-side serial interface, which generates information whenthe
module is powered on and starts.
3.3 Test Pin Definition
Table 3-2 WBR3D test pins
Pin No.
Symbol
I/O Type
Function
N/A
TEST
Input
Used for the module production test
Note:
Test pins are not recommended.