Data Sheet

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2 PIN DEFINITIONS

2. Pin Definitions

2.1 Pin Layout

32K_XP 12

VDET_2 11

10

9

8

7

6

5

4

3

2

1

VDET_1

CHIP_PU

SENSOR_VN

SENSOR_CAPN

SENSOR_CAPP

SENSOR_VP

VDD3P3

VDD3P3

LNA_IN

VDDA

25

26

27

28

29

30

31

32

33

34

35

36

GPIO16

VDD_SDIO

GPIO5

VDD3P3_CPU37

GPIO1938

39

40

41

42

43

44

45

46

47

48

GPIO22

U0RXD

U0TXD

GPIO21

XTAL_N

XTAL_P

VDDA

CAP2

CAP1

GPIO2

24

MTDO

23

22

21

20

19

18

17

16

15

14

13

MTCK

VDD3P3_RTC

MTDI

MTMS

GPIO27

GPIO26

GPIO25

32K_XN

ESP32

SD_DATA_2

SD_DATA_3

SD_CMD

SD_CLK

SD_DATA_0

SD_DATA_1

GPIO4

GPIO0

GPIO23

GPIO18

VDDA

GPIO17

Figure 2: ESP32 Pin Layout

2.2 Pin Description

Table 1: Pin Description

Name No. Type Function

Analog

VDDA 1 P Analog power supply (2.3V ~ 3.6V)

LNA_IN 2 I/O RF input and output

VDD3P3 3 P Amplifier power supply (2.3V ~ 3.6V)

VDD3P3 4 P Amplifier power supply (2.3V ~ 3.6V)

VDD3P3_RTC

SENSOR_VP 5 I

GPIO36, ADC_PRE_AMP, ADC1_CH0, RTC_GPIO0

Note: Connects 270 pF capacitor from SENSOR_VP to SEN-

SOR_CAPP when used as ADC_PRE_AMP.

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