Espressif Systems ESP8266EX - 2.2. Schematics

CONFIDENTIAL
Espressif
Systems
ESP8266EX Beginner’s Guide
1.2. Hardware Overview
1.2.1. Pin Definition
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Figure 2: ESP8266EX Pin Definition Diagram
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Pin
Name
Type
Function
1
VDDA
P
Analog Power 3.0 ~3.6V
2
LNA
I/O
RF Antenna Interface，Chip Output Impedance=50 Ω
No matching required but we recommend that the π-
type matching network is retained.
3
VDD3P3
P
Amplifier Power 3.0~3.6V
4
VDD3P3
P
Amplifier Power 3.0~3.6V
5
VDD_RTC
P
NC(1.1V)
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