Schematics
2
.0
of
S
heet
Title
Date:
Size
11
Rev
B
5 4 3 2 1
A
B
C
D
12345
D
C
B
A
MI
C_
AUX
AUX
A
B
D
AB
D
R28
4R7
C18
105
R23
3K3
1
D2
2
CD/D3
3
CMD
4
VDD
5
CLK
6
GND
7
D0
8
D1
9
CD
10
COM1
11
COM2
12
COM3
13
COM4
CARD1 TF_CARD
1
USB5V
2
D-
3
D+
4
GND
5
CO
M
6
COM
J4
C14
106
R5
22K
R4
9.1K
R3
3K
R20
33K
R21
6.2K
R24
15K
R12
24K
K2
PO
WER/M
K1
PR
EV
K6
PP
K4
NEXT
K7
CL
K
K3
V-
K5
V+
1
GND
2
R
3
L
4
C
OM_K
JK1
MI95O
R11
2.7K
R10
2.7K
C24
104
C2
104
C
21
15P
C
20
15P
Y1
32.768KHz
1
PB4/SD1D
ATB/ADC7
2
VBAT
3
VDDIO
4
RTCVDD33
5
PR1/OSC32KO
6
PR0/OSC32KI
7
PB3/ADC6
8
PB2/SPI1DIA
9
PB1/SPI1DOA/ADC5
10
PB0/SPI1CLKA
11
BT_AVDD
12
BT_RF
13
VS
SIO
14
BT_OSCI
15
BT_OSCO
16
PC5/SD1CLKA/CMO0/SPI1DOB/ADC13
17
PC4/SD1CMDA/COM1/SPI1CLKB/ADC10
18
PC3/SD1DATA/COM2/SPI1DIB
19
PC2/COM3/SEG18
20
PC1/COM4/SEG17
21
PC0/COM5/SEG16
22
PA12/SEG12/ADC4
23
USBDM
24
USBDP
25
A
DC3/SD0CLKA/SEG10/PA10
26
SD0CMDA/SEG9/PA9
27
SD0DATA/SEG8/PA8
28
SEG7/PA7
29
ADC2/SEG6/PA6
30
ADC1/SEG5/SSEG4/PA5/PA4
31
SEG3/PA3
32
ADC0/AUX0R/SEG2/SEG1/PA2/PA1
33
AUX0L/SEG221/SEG0/MIC_BIAS/PA0/PC7
34
MIC
35
HPVDD
36
DACVSS
37
VCOM
38
DACVDD
39
DACL
40
DACR
42
SD_PWR/PB11
43
ADC9/AUX2R/SD0CMDB//PB10
44
AUX2L/SD0CLKB/PB9
45
ADC8/AUX1R/SD0DATB//PB8
46
AUX1L/PB7
47
SD1CLKB/PB6
48
SD1CMDB/PB5
U2
Y2
24MHZ
C12
2.7P
1
J2
C
16
105
C
6
105
C
7
105
C
19
105
C
15
105
C5
105
C8
105
R6
100K
R7
100K
1
SD
2
MOD
E
3
IN+
4
IN-
6
OUTP
8
VSS
7
OUTN
5
VDD
U3 XA8875
C
13
106
R1
100K
R18
39K
C
1
105
C10
104
C
11
104
Q1
9014
R13
1K
R22
100K
Q3
SI3401
R16
47K
Q2
9014
R15
1K
R14
100K
1
V
OUT
2
GND
3
EN
4
C-
5
V
IN
6
C+
U1
C
17
106
C
4
106
C
3
106
R17
10K
D
2
NC
18A
5
GND
4
GND
3
DP
2
DM
1
5V
9
8
10
11
JK2
USB5PIN-S
MD-A
18B 18C 18D 18E 18F 18G
28A 28B 28C 28D 28E 28F 28G
38A 38B 38C 38D 38E 38F 38G
48A 48B 48C 48D 48E 48F 48G
BT MP3 AUX FM CLK2 CLK1 BAT
FULL
BAT
LOW
P2 P1
1
C
HRO
2
GND
3
BAT
4
VCC
5
PROG
U4
LP4006
C
9
105
R26
2.2K
R25
1K
D
1
RED
C22
105
1
2
J1
P3
1
2
J3
1
1
2
2
SPK1
C25
R30
F
B
T1
R8
4R7
R9
NC
C
23
NC
1
VT
2
VS
S
3
VDD
4
VM
5
VM
U5
NC
R32
0R
SDPOWER
SDC
MD
SDCLK
SDDAT
USBDM
USBDP
USB5V
GND
ADKEY
3V3
AUXL/R
AUXDET
MIC_
BAIS
MIC
XINXOUT
GND
XOUT
XIN
SDCLK
SDCMD
SDDAT
USBDM
USBDP
AUX
L/R
DACR
DACL
MU
TE
MCUVCC
MIC
MIC_BAIS
SDP
OWER
B
AT_DET
VBAT
BAT_DET
COM0
COM1
COM2
COM3
COM4
S
EG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
VBAT
MUTE
DACL
DACR
AB/D
USB_C
MCUVCC
VBAT MCUVCC
USB_
C
DC5V
SEG
9
CO
M3
SEG
1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
CO
M4
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
CO
M0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
CO
M1
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
CO
M2
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG8
SEG9
AUXDET
ADKEY
3V3
VBAT
SEG8
GND
G
ND
GND
FMA
NT
FMAN
T
3
V3
AB/D
VBAT
VBAT
AB5362B