Schematics

D
C
B
A
1 2 3 4 5 6
A
B
C
D
654321
C10
104
R2
6.8K
Y1
26MHZ
C20
NC
C19
NC
1
2
BT-ANT1
ANTENNA_PIFA
C6 104
C15
104
C16
105
C17
105
C12
NC
C11 0R
2
VDDDAC
12
VDDBT
11
DGND
10
VBAT
13
PWRKEY
3
AGND
24
DACL
4
FM_ANT
14
BT_ANT
9
VDDIO
15
BT_OSCI
16
BT_OSCO
7
PE0/MUTE/IR
22
IR/ADC10/MICL/PF2
1
VCMBUF
21
IR/ADC0/SDCMD1/PA5
20
IR/ADC1/AUXL0/SDCLK1/PA6
19
ADC2/AUXR0/SDDAT1/PA7
17
ADC6/USB_DM/PB4
18
ADC5/USB_DP/PB3
6
PE6/AUXL2/ADC8/IR
5
PE7/AUXR2/ADC9/IR
23
DACR
8
VUSB
U4
AB5325B--SSOP24-150mil
C13
NC
USBDP
1
2
CN2
1
2
CN1
1
2
SPK4
1
2
SPK3
R1
47K
1
2
VL-1
R15 330R
1
2
J1
D1
0R
R6
4R7
C1
220UF/10V
C42 224 R21 20K
1
2
SPK1
CON2
1
CGND
2
AGND
3
EN
4
CN2
5
CP2
6
CVDD
7
NC
8
INN
9
INP
10
AVDD
11
NC
12
NC
13
PVDD
14
VON
15
PGND
16
VOP
17
PVDD
18
CP1
19
PVOUT
20
CN1
U2
FT2820
C25 225
C35
105
C48
104
C3 NC
C50
R23100R
C43 224 R22 20K
C40 224 R16 20K
1
2
SPK2
CON2
1
CGND
2
AGND
3
EN
4
CN2
5
CP2
6
CVDD
7
NC
8
INN
9
INP
10
AVDD
11
NC
12
NC
13
PVDD
14
VON
15
PGND
16
VOP
17
PVDD
18
CP1
19
PVOUT
20
CN1
U1
FT2820
C31 225
C38
105
C51
104
C7 NC
C49
R25100R
C41 224 R18 20K
R7 20K
C2
225
R17 0R
VDDDAC
VDDDAC
VBAT
VDDIO
VDDBT
OSCI
OSCO
BT_ANT
DACL
DACR
MICIN
LED
PWRKEY
MUTE
$$$19827
MICIN
$$$19827
PWRKEY
PWRKEY
LED
VBAT
VBAT
VBAT
SD
DACL
VBAT
VBAT
SD
MUTE
DACR