1
1
2
2
3
3
4
4
D D
C C
B B
A A
STMicroelectronics
Title:
Number: Rev: Sheet of
B.1(PCB.SCH)
Date:
2007-06-21
1
2
U15
KECG2740TBL
2
1 U12
KDMG15008-03
+3V3
C38
1uF
C39
1uF
C36
2.2uF
R37
1K
R40
1K
Standby
1
Bypass
2
Vin+
3
Vin-
4
Uout1
5
VCC
6
GND
7
Vout2
8
U13
TS4871IST
R29
10K
JP6
+3V3
+3V3
C30
100nF
C32
150nF
R33
22K
R31
100K
C31
470pF
C35
2.2uF
C34
100uF
C33
33nF
R32
1.2K
TP4
AudioPB8
TP6
MIC_OUT
TP5
MIC+
G2
1
OUT
3
SHDN
2
Vcc
4
IN+
5
IN-
6
GND
7
G1
8
U14
MAX4061EUA+
R36
1K
R38
1K
R39
1K
C37
2.2uF
+3V3
TP7
MIC-
R30
10K
+3V3
JP7
R34
0(don't solder)
R35
0
13
2
RV2
50K
1 3
2
RV3
20K
Speaker+
Speaker-
1
10
2
CN8
ST-613
MB525 5 11
STM32F10X-128K-EVAL Audio
C54
do not fit
R119 0 R71 0 PC5
Audio_PWM
MIC_IN
Speaker
Microphone
