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unconnected

40

16V 10uF

48

Programming connector

4

unconnected

34

external crystal oscillator

25

PGD

31

PGC

32

2Vrms

49

Unconnected Disable the Internal Audio Amplifier (AT command)

42

unconnected

35

0.9 (2.5) V rms (V p-p)

46

Operational Range: The NE5532 op-amp operates well within a range of ±3V to ±20V...

44

3.5 aux in connector

5

Pulling MCLR low resets the microcontroller. Upon release (returning to high), t...

30

Battery board connector

2

unconnected

43

Oscillator sync interface

6

WSL2010R2000FEA

50

I²S to Bluetooth

10

Connect a pull-up resistor (typically 10kΩ) between the Bluetooth module reset p...

22

3.3V

R30

Resistance

10kΩ

C87

Capacitance

100pF

C86

Capacitance

100pF

R28

Resistance

1kΩ

C84

Capacitance

22pF

R32

Resistance

49.9kΩ

R13

Resistance

10kΩ

C85

Capacitance

22pF

IC1

R50

Resistance

4.7kΩ

R47

Resistance

100 Ω

R20

Resistance

18kΩ

R33

Resistance

8.2kΩ

R49

Resistance

4.7kΩ

R31

Resistance

8.2kΩ

SCL

SDA

I2S1_SD_OUT/SDATA_IN0

DAC_OUT1

SCL

I2S1_WS/LRCLK

DAC_OUT4

DAC_OUT2

RST_ADAU

DAC_OUT3

I2S1_CLK/BCLK

I2S1_SD_IN/SDATA_OUT0

C68

Capacitance

10µF

C63

Capacitance

0.1uF

C65

Capacitance

0.1uF

C62

Capacitance

0.1uF

C67

Capacitance

0.1uF

C69

Capacitance

0.1uF

C70

Capacitance

10µF

C59

Capacitance

0.1uF

C58

Capacitance

0.1uF

C66

Capacitance

10µF

C56

Capacitance

0.1uF

C64

Capacitance

0.1uF

C73

C71

Capacitance

56nF

Q1

C72

Capacitance

3.3nF

C74

U2

C60

Not Recommended for New Designs

Capacitance

10uF

C61

Not Recommended for New Designs

Capacitance

10uF

U9

C57

Not Recommended for New Designs

Capacitance

10uF

R29

Resistance

475 Ω

C94

Capacitance

4.7uF

Y2

draft