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Figure 12. Audio
1
1
2
2
3
3
4
4
D
D
C
C
B
B
A
A
STMicroelectronics
Title:
Number:
Rev:
Sheet of
B.2(PCB.SCH)
Date:
10/16/2014
MB1115
4
6
STM32F411E-DISCOVERY Audio
PA4
PC12
PC10
R43
10K
PB6
PB9
R59
51
PD4
PC7
3V
I2C address 0x94
2V5
3V
R60
51
Audio_RST
R45
100
Audio_SDA
Audio_SCL
I2S3_MCK
I2S3_WS
I2S3_SCK
I2S3_SD
Audio_DAC_OUT
PDM_OUT
R51
100
R50
100K
R44
100K
R52
1.2K
3V
CLK_IN
PDM_OUT
3V
1
3
2
CN4
ST-225-02
PC3
PA4
PC3
PB10
PC3
PB10
PB6
PB9
PC7
PC10
PC12
PA4
PD4
PC4
PC4
SDA
1
SCL
2
A0
3
SP
4
VP
5
SPKR_OUTA-
6
SP
7
VP
8
SPKR_OUTB-
9
-VHPFILT
10
FLYN
11
FLYP
12
+VHP
13
HP/LINE_OUTB
14
HP/LINE_OUTA
15
VA
16
AGND
17
FILT+
18
VQ
19
TSTO
20
AIN4A
21
AIN4B
22
AIN3A
23
AIN3B
24
AIN2A
25
AIN2B
26
AFILTA
27
AFILTB
28
AIN1A
29
AIN1B
30
SPKR/HP
31
RESET
32
VL
33
VD
34
DGND
35
TSTO
36
MCLK
37
SCLK
38
SDIN
39
LRCK
40
GND/Thermal Pad
41
U8
CS43L22
GND
1
GND
3
LR
2
CLK
4
VDD
6
DOUT
5
U10
MP45DT02
C47
1uF
C57
1uF
C63
1uF
C62
1uF
C49
100nF
C50
100nF
C44
100nF
C45
100nF
C59
100nF
C66
100nF
C46
100nF
C60
22nF
C58
10nF
C61
22nF
C51
150pF
C53
150pF
C52
1uF
C56
1uF
C65
10uF
C64
1uF
R62
[NA]
R46
[NA]
R47
[NA]
R63
0
R53
0
R61
0