Figure 1. PIC32 Audio Codec Daughter Board WM8904 Schematic

rotatethispage90

1

1

2

2

3

3

4

4

5

5

6

6

D

D

C

C

B

B

A

A

+5V_PD

+3.3V

+9 V

HDR-2.54 Female 2x10

J1

HDR-2.54 Female 2x6

J2

MB CONNECTORS

UART1_Tx

I2S1_LRCL

I2S1_BCLK

I2S1_MOSI

CARD_ID

+3.3V

approx. 1.0V

HP OUT

STBY/RST

I2S1_MISO

SDA1

SCL1

UART1_Rx

I2S1_MCLK

UART1_CTS#

UART1_RTS#

VIN

1

VSS 2

SHDN

3

NC

4

VOUT 5

MCP1801/1.8V

U2

0.1R

R3

+3.3V

+3.3V

SDA1

SCL1

1uF

C2

10uF

C1

10uF

C3

SJI-3535NG-GR

(Green)

+1.8V

MICVDD

DBVDD

AVDD

CPVDD

DCVDD

AGND

AGND

AGND

2.2uF

C14

4.7uF

C9

4.7uF

C15

4.7uF

C16

AGND

0R

R8

0R

R7

20R

R10

20R

R12

470pF

C6

470pF

C7

4.7uF

C23

0.1uF

C18

0R

R20

DNP

R6

4.7uF

C12

DNP

R15

DNP

R16

AGND

AGND

0.1uF

C4

0.1uF

C5

AGND

5

1

4

3

2

J4

AGND

0R

R14

0R

R17

1uF

C8

1uF

C10

DNP

R18

DNP

R19

470pF

C11

5

1

4

3

2

J3

MIC IN

(Pink)

SJI-3535NG-PI

470pF

C13

AGND

AGND

AGND

GND

MICVDD

DBVDD

AVDD

CPVDD

DCVDD

+3.3V

4.7uF

C19

AGND

+3.3V

0.1uF

C21

4.7uF

C22

VCC_P1V8

2.2uF

C17

0.1uF

C20

AGND

VCC_P1V8

0.1uF

C24

AGND

VCC_P1V8

0.1uF

C27

4.7uF

C26

SDA1

SCL1

LRCL

BCLK

I2S1_MCLK

UART1_RTS#

2.2k

R11

2.2k

R13

1nF

C25

1

2

3

J6

I2S2_LRCL

I2S2_BCLK

I2S2_MOSI

I2S2_MISO

I2S2_LRCL

I2S2_BCLK

I2S2_MOSI

I2S2_MISO

1

2

3

J7

1

2

3

J8

1

2

3

J9

I2S1_BCLK

BCLK

MOSI

MOSI

MISO

I2S1_LRCL

I2S1_MOSI

MISO

I2S1_MISO

LRCL

IRQ/GPIO1

1

SCLK

2

SDA

3

DBVDD

4

DGND

5

DCVDD

6

CPVDD

7

CPCA 8

CPGND

9

CPCB

10

CPVOUTP 11

CPVOUTN 12

HPOUTL

13

HPOUTFB 14

HPOUTR 15

LINEOUTL 16

LINEOUTFB 17

LINEOUTTR

18

MICVDD

19

MICBIAS

20

VMIDC 21

AGND 22

AVDD

23

IN2R

24

IN1R/DMICDAT2

25

IN2L

26

IN1L/DMICDAT1

27

MCLK

28

BCLK/GPIO4

29

ADCDAT 31

DACDAT

32

T-PAD 33

LRCLK

30

U1

WM8904CGEFL/V

5

1

4

3

2

J5

LINE IN

SJI-3535NG-BE

(Blue)

5.6k

R23

10k

R26

220pF

C30

5.6k

R24

5.6k

R21

5.6k

R22

220pF

C31

1uF

C29

1uF

C28

10k

R25

AGND

AGND

AGND

AGND

AGND

BLM15BA050SN1D

FB1

10uF

TANT-A

C32

BLM15BA050SN1D

FB2

BLM15BA050SN1D

FB3

BLM15BA050SN1D

FB4

BLM15BA050SN1D

FB5

BLM15BA050SN1D

FB6

BLM15BA050SN1D

FB7

BLM15BA050SN1D

FB8

10uF

TANT-A

C33

62k

R1

27k

R2

Shunt 2.54mm 1x2

JP6

Shunt 2.54mm 1x2

JP7

Shunt 2.54mm 1x2

JP8

Shunt 2.54mm 1x2

JP9

LABEL Need Help Small

LABEL1

4.7k

R4

4.7k

R5

22R

R9

22R

R9