User's Manual

ESP-12F User Manual
Shenzhen Ai-Thinker Technology Co., Ltd http://www.ai-thinker.com
8
I2S Output:：
IO15 (I2SO_BCK );
IO3 (I2SO_DATA);
IO2 (I2SO_WS ).
2.2.
Pin Mode
Table 4 Pin Mode
Mode
GPIO15
GPIO0
GPIO2
UART
low
low
high
Flash Boot
low
high
high
2.3. Antenna interface
ESP-12F Modules through the IPEX interface to connect to external antenna.
The antenna must be in line with the 802.11g/802.11b IEEE standard, and the antenna parameters are shown in
the following table：
Table 5 Antenna parameters
Rating
Value
Frequency range
2.4~2.4825GHz
Impedance
50Ω