Schematics

D

C

B

A

1

2

3

4

5

6

A

B

C

D

6

5

4

3

2

1

USB³äµç

µç³Ø

MIC

°´¼ü

ָʾµÆ

C14

6.8K

R5

104

2

1

MIC

L1

10uH

C8

105

C3

106

C2

225

C7

225

L3

1P

L4

NC

R3

2.7NH

C13

104

C12

104

Y1

26MHZ

K1

3X3X0.8

R-LED

RED

B-LED

BLUE

BT1

4.2V

C1

105

UPDATE

1

GND

2

5V

B-

B+

10

VDDBT

7

VDDBT

8

PWRKEY

5

LX

6

DGND

4

VBAT

2

VUSB

18

DACL

16

ADC10/MIC/PF2

11

BT_OSCI

12

BT_OSCO

9

BT_ANT

3

VDDIO

19

VDDDAC

1

AGND

0

RFGND

17

VCMBUF

20

VDDPA

13

ADC6/PB4

14

ADC5/PB3

15

ADC2/PA7

U2

AB5376A2 QFN20 3*3

AB5376A2 QFN20 3*3

ANT1

3216

L+

L-

C10

102

C9

102

C33

L3

L2

1K/1G

VDDIO

PWRKEY

BT_ANT

MICIN

VDDBT

VDDDAC

VUSB

VBAT

VDDDAC

VUSB

CHRG_LED

BLUE_LED/UPDATE

VBAT

OSCO

BT_RF

PWRKEY

VDDBT

OSCI

BLUE_LED/UPDATE

CHRG_LED

DACL#

DACL

MICIN

DACL

DACL#
