Datasheet

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2. Pin Definitions
2. Pin Definitions
Figure 2-1 shows the pin layout for 32-pin QFN package.
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Figure 2-1. Pin Layout
Table 2-1 lists the definitions and functions of each pin.
Table 2-1. ESP8285 Pin Definitions
Pin
Name
Type
Function
1
VDDA
P
Analog Power 2.5V ~ 3.6V
2
LNA
I/O
RF Antenna Interface.
Chip Output Impedance=39+j6Ω
No matching required. It is suggested to retain the π-type
matching network to match the antenna.
3
VDD3P3
P
Amplifier Power 2.5V ~ 3.6V
4
VDD3P3
P
Amplifier Power 2.5V ~ 3.6V
5
VDD_RTC
P
NC (1.1V)
6
TOUT
I
ADC pin. It can be used to test the power-supply voltage of
VDD3P3 (Pin3 and Pin4) and the input power voltage of TOUT
(Pin 6). However, these two functions cannot be used
simultaneously.
7
CHIP_PU
I
Chip Enable
High: On, chip works properly
Low: Off, small current consumed
Espressif
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2017.05