Product Manual

9
WBR2D Datasheet
Table 3-1 WBR2D interface pins
Pin No.
Symbol
I/O Type
Function
1
3.3 V
P
Power supply pin (3.3 V)
2
IO5
I/O
Common GPIO pin, hardware PWM
3
GND
P
Power supply reference ground pin
4
IO4
I/O
Common GPIO pin, hardware PWM
5
RXD0
I/O
RXD pin of the serial interface
6
IO13
I/O
Common GPIO pin, hardware PWM
7
TXD0
I/O
TXD pin of the serial interface
8
TOUT
AI
ADC pin (See the following Note 2.)
9
IO12
I/O
Common GPIO pin, hardware PWM
10
RST
I/O
External reset pin
11
IO14
I/O
Common GPIO pin, hardware PWM
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 an ADC input, the input
voltage range is 0 V to 1.0 V.
3.3 Test Pin Definition
Table 3-2 WBR2D 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.