Schematics

1
1
2
2
3
3
4
4
D D
C C
B B
A A
2018 12 13 0.1
SD_CMD
SD_CLK
SD_DAT
SD
R19
3.3K
D2
1
D3/CS
2
CMD
3
VDD
4
CL K /SCK
5
VSS
6
D0
7
D1
8
WP
9
CD
10
Sheet
11
J3
SD
+3.3V
USBD- USBD+
+5V
1
D-
2
D+
3
GND
4
EGND
5
J2
USB2.0
VDD
1
2
J4
2P/2.0MM
SPR-
SPR+
SD
1
bypass
2
IN+
3
IN-
4
OUT-
5
VDD
6
GND
7
OUT+
8
U6
LPA2172
C22
104
C23
105
C21
473
R11
4.7K
ABD
DACL /R
VDD
SPR-
SPR+
+3.3V
S1 S2 S3 S4
BAT+
+5V
1
LNI_L
2
AGND
3
LIN_R
4
GND
5
6 66
6
J1
MIOCRO
D3
IN4007
D2
1
2
J5
2P/2.0MM
1
1
2
2
3
3
S5
12D02-4mm
VI N
VDD
C12
104
R5
3.3K
LINEL/R
1
2
J7
2P/2.0MM
1
2
J8
NC
VDD
R17
10R
FM_OUT
C10
10pF
L1
180NH
KEY2 KEY1
/
/
MOOD
+3.3V
MUTE
R18
1R
C11
225/NC
GND
FM
FM2
C19
223
R12
20K
C24
104
R13
10K
C25
105/NC
SD_CMD
SD_DAT
SD_CLK
+3.3V
KEY1
F1
BT_ANT
C6 474
C7 474
C2
NC
C1
NC
C3
2.7pF
L2
NC
C8
474
USBD-
USBD+
C4 474
C5 474
ABD
DACRL
VDDLIN_L/R
DACVDD
Y2
NC
MUTE
Y1
24MHz
PC5/CLK
1
PC4/CMD
2
PC3/SD1DATA
3
USBDP/ADC10
5
MIC/PA4/AUX1R/ADC1
6
PA3/AUX1L/ADC0
7
DACL
8
DACVDD
9
VCOM
10
DACVSS
11
VDDI O
12
ADC9/AUX/CL KB/PB5
13
ADC8/AUX/CMDB/PB4
14
SD0DATB/PB3
15
ADC6/PB0
16
ADC7/PB1
17
LDO_IN
18
BT_AVDD
19
BT_RF
20
FMIP
21
FMVSS
22
BT_OSCI
23
BT_OSCO
24
USBDM/ADC11
4
U2
AC6925B
KEY2
FM_ANT
R36
NC
VDD
R54
10R/NC
R53
1K/NC
C
3
B
1
E
2
Q2
8050/NC
LED
LED
L5
100nH/NC
R14
10K
VDD
R3
330R
C50
106
R51
2K
CHRG
1
GND
2
BAT
3
VCC
4
PROG
5
U10
CH4054
R50
NC