Schematics

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
LED
MCU:LC6956A
LEDB/R
OSC24MI OSC24MO
BT-ANT-IC
VCOM
DM
DP
DACL
DACR
VCOMO
NEXT/V+
WKUP
PREV/V-
MIC
SW
LEDB/R
WKUP
DACL
MIC
DP
DM
VCOM
BT-ANT-IC
OSC24MI
OSC24MO
DACR
SW
VCOMO
NEXT/V+ PREV/V-
LEDR
LEDR
GND
GND
3V3
GND
VBAT
GNDA
DACVDD
VBAT
GND
GNDAGND
DC+5V
GNDA
VBAT
GND
GND
HPVDD
GND
GND
DC+5V
GND
VBAT
BT_AVDD
3V3
GND
DVDD
GND
DC+5V
DVDD
GND
DACVDD
GNDA
GND
GND
BT_AVDD
DACVDD
3V3
HPVDD
GND
Title
Size Document Number Rev
Date: Sheet of
<Doc> V6
<Title>
A4
1 1Monday, July 27, 2020
Title
Size Document Number Rev
Date: Sheet of
<Doc> V6
<Title>
A4
1 1Monday, July 27, 2020
Title
Size Document Number Rev
Date: Sheet of
<Doc> V6
<Title>
A4
1 1Monday, July 27, 2020
M+
K3NEXT/V+
C7
NC
VBAT
K2PREV/V-
LL+
C11
222/10V
B-
R10
2.2K
L3NC
GND
LR-
K1POWER/PP/TEL
U1
LC6956A-QFN32
PB9/SD0CLKB/AUX2L
4
PB8/SD0DATB/AUX1R/ADC8
5
PB11/SD_PWR
2
ADC2/PA6
25
PB0
14
PB10/SD0CMDB/AUX2R/ADC9
3
PGND
7
NC
8
VBAT
6
BT_AVDD
10
VDDIO
11
PB3/ADC6
12
PB1/ADC5
13
NC
15
BT_RF
16
VSSIO
17
BT_OSCI
18
BT_OSCO
19
ADC13/SD1CLK/PC5
20
ADC10/SD1CMD/PC4
21
DVDD
22
USBDM
23
ADC12/USBDP
24
ADC1/PA5
26
ADC0/AUX0R/MIC/PA1/PC6
27
DACR
28
DACL
29
PAD
33
VCOMO
30
DACVDD
31
NC
32
DACVSS
1
LDO_IN/PB5
9
R12
1R/0603
C10
105/10V
R+
C12
NC
Y1 24MHz/10PPM
1 3
2 4
USB1
Micro-USB
VBUS
1
D-
2
D+
3
ID
4
GND
5
S1
6
S2
7
S3
9
S4
8
VDDIO
L-
L4 120nH
MIC
C23
105
C9
105
R4 330R
C5
105
DM
R3 330R
C8
NC
B+
C1 2.7P
C3
NC
LL-
L2 120nH
C2
NC
LR+
R2
NC
MIC1
MIC-4013
1
2
ANT1
PCB_BT_ANT
1
TP2
C17
NC
L+
R-
DP
L1 120nH
C13
105
C20 104
R1
NC