Users Manual

D
C
B
A
1 2 3 4 5 6
A
B
C
D
654321
POWER
MIC
Èí¿ª¹Ø»ú°´¼ü
KEY
LED
פ¼«ÌåMIC
VBAT
VDDDAC
C2 104
Y1
24MHZ
L1
10uH
C7
105
L4
NC
L2 0R
L3
NC
C1 104
C5 105
C4 104
C6
475
K1
POWER/PP/PHONE
K2
NEXT/VOL+
K3
PREV/VOL-
0
E-GND
23
VDDDAC
14
BT_OSCO
13
BT_OSCI
8
VDDBT
2
PE7/ADC9
9
PWRKEY
5
VBAT
6
LX
7
DGND
4
VDDIO
24
VDDDAC12
20
DACR#
19
DACR
18
ADC10/MIC/PF2
15
ADC6/PB4
16
ADC5/PB3
10
BT_RFGND
11
BT_ANT
3
VUSB
21
DACL
22
VCMBUF/DACL#
1
AGND
12
BT_AVDD
17
ADC2/PA7
U1
BT8925B2 QFN24 4*4
D1 RED
D2 BLUE
R5
6.8K
C8 104
C9
NC
+
MIC
C3 475
B+
B-
R+
R-
C13
33pF
C15
33pF
L+
L-
C10
33pF
C12
33pF
C11
NC
C14
NC
PB3
1
GND
2
VBUS
3
CC1
4
CC2
5
VBUS
6
GND
7 8 9
10
USB
TYPE-C-6PIN
R1
5.1K
5V
GND
MAK
PWRK
21
D3
5V
R2 5.1R
R3 1K
R4
100K
1
2 3
Q1
8550
1
32
Q2
3401
VBAT
VDDDAC
DACL# DACL VDDDAC12
CHRG_LED
PWRKEY
VUSB
VBAT
VDDIO
VDDDACVDDBT
NEXT
DACR# DACR
MICIN
NEXT
OSCO
OSCI
PREV
CHRG_LED
BLUE_LED
MICIN
DACL
DACL#
DACR
DACR#
BLUE_LED
PWRKEY
VIN
PWRKEY
VUSB
PREV