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:
3/27/2009
1
2
U4
KECG2740TBL
2
1 U24
KDMG15008-03
C29
180pF
C16
100nF
R21
100K
R18
100K
R30
10K
JP9
+3V3
+3V3
C43
470nF
R33
22K
R36
22K
C45
330pF
C28
1uF
TP6
MIC_OUT
TP7
MIC+
R15
1K
R12
100
R11
2.2K
C11
47pF
VDD
R20
15K
13
2
RV3
[N/A]
Speaker+
Speaker-
1
10
2
CN13
ST-613
C17
[N/A]
R16 0
R13
500
Audio_OUT
Audio_IN
4
3
1
2 5
U9
TS461CLT
C12
10uF
C27
4.7uF
C26
2.2uF
R25
18K
VDD
R24 82K
R22
680
C13
4.7uF
+3V3
R38
0
C47
[N/A]
MB818 4 12
STM8L1526-EVAL Audio
Standby
1
Bypass
2
VIN+
3
VIN-
4
VOUT1
5
VCC
6
GND
7
VOUT2
8
U15
TS4990ISTC37
1uF
PF0
PB3
JP3
- 1
- 2
- 3
- 4
- 5
- 6
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