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STEVAL-CCA021V1
USB audio demonstration board
based on the STM32F103RE and TS4657
Data brief
Features
■
STM32F103RE performance line
microcontroller
■
16 MHz crystal unit
■
USB connector and ESD protection
■
Two LEDs driven by the microcontroller
■
Push button to control the firmware mode
■
TS4657 - single supply stereo digital audio line
driver with 2.2 VRMS capless outputs:
– 16- to 24-bit audio data format stereo DAC,
32 to 48 kHz sample rate
– I2S, right or left-justified compatible digital
audio interface
■
TS2012 - filter-free stereo 2x2.8 W class D
audio power amplifier
■
TS4962 - 2.8 W filter-free mono class D audio
power amplifier
– Output available either through mono jack
connector or to on-board speaker
■
TS472 - very low noise microphone
preamplifier with 2.0 V bias output and active
low standby mode
– Single-ended output available for
connection to ADC of a microcontroller
■
On-board microphone and small speaker
■
RoHS compliant
STEVAL-CCA021V1
Description
The STEVAL-CCA021V1 demonstration board
implements a USB audio card based on the
STM32F103RE microcontroller and the TS4657
audio digital-to-analog converter (decoder). The
complete system consists of a controller board
driven by the STM32F103RE microcontroller, and
a TS4657-based audio board.
Mono audio output is available either through the
TS4962-driven on-board speaker or via the mono
jack connector, and stereo output is possible
through the TS2012 stereo audio amplifier which
can drive external speakers. Both audio amplifiers
are class D.
For audio input, an on-board microphone is
connected through the TS472 microphone preamplifier to the ADC input of the microcontroller. It
is possible to disconnect the controller section
from the audio section to use the boards
individually for other applications.
September 2009
Doc ID 16318 Rev 1
For further information contact your local STMicroelectronics sales office.
1/5
www.st.com
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C5
4.7uF
1
2
3
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Doc ID 16318 Rev 1
SPI1_NSS
SPI1_MISO
CN1
MLW20G 3V3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
USB_A
Vbus
DD+
GND
SH1
SH2
CN2
USB1X90A PCB
C2
1uF
Internal pull-down
JTCK
NRST
R2
R9
10K
3V3
3V3
DBGACK R14
M25P64-VME6G
100nF U3
7
HOLD
C
8
VCC
D
1
S
VSS
2
Q
W
C16
10K
10K
Internal pull-up
JTMS
JTDO
Internal pull-up
R1
Internal pull-up
10K
I/O1
Vbus
I/O2
C4
10nF
USBLC6-2P6
I/O1
GND
I/O2
JTDI
1
2
3
U4
4
5
JTRST
4.7nF
1M
Vout
BYPASS
LD3985XX33
INHB
GND
Vin
U2
DBGRQ
RTCK
C6
R7
USB5V
3
2
1
6
5
4
3
3V3
6
5
4
1k5
3V3
3V3
R5
R3
4R7 USBDN
USB5V
4R7 USBDP
R4
C3
1uF
SPI1_SCK
SPI1_MOSI
C1
4.7uF
3V3
Inductor
10mH
L1
VSSA
3V3
10k
R6
A3V3
C15
100nF
C9
100nF
NRST
BOOT0
X1
X2
USBDN
USBDP
JTMS
JTCK
JTDI
BUTTON
PA0
PA1
PA2
PA3
SPI1_NSS
SPI1_SCK
SPI1_MISO
SPI1_MOSI
13
32
48
64
19
1
7
60
5
6
54
41
42
43
44
45
46
49
50
14
15
16
17
20
21
22
23
STM32F103RET6
VDDA
VDD_1
VDD_2
VDD_3
VDD_4
VBAT
NRST
BOOT0
OSC_IN/PD0
OSC_OUT/PD1
PD2
PA8
PA9
PA10
PA11
PA12
PA13/JTMS/SWDIO
PA14/JTCK/SWCLK
PA15/JTDI
PA0-WKUP
PA1
PA2
PA3
PA4
PA5
PA6
PA7
U1
GND
X1
GND
3 X2
2
VSSA
VSS_1
VSS_2
VSS_3
VSS_4
PC8
PC9
PC10
PC11
PC12
PC13-TAMPER-RTC
PC14-OSC32_IN
PC15-OSC32_OUT
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PB8
PB9
PB10
PB11
PB12
PB13
PB14
PB15
PB0
PB1
PB2/BOOT1
PB3/JTDO
PB4/JNTRST
PB5
PB6
PB7
TSX-3225 / 16MHz
C8
33pF
X1 1
4
12
31
47
63
18
39
40
51
52
53
2
3
4
8
9
10
11
24
25
37
38
61
62
29
30
33
34
35
36
26
27
28
55
56
57
58
59
C10
33pF
VSSA
R8
0R
USB_ACTIVITY
USB_ACTIVITY
LED_ACTIVE
I2S2_MCK
PC0
PC1
PC2
PC3
I2S2_SD
I2S2_WS
I2S2_CK
I2C1_SCL
I2C1_SDA
BOOT1
JTDO
JTRST
LD2
2
A3V3
1
3V3
B1
470
R12
2
4
6
8
10
12
14
16
18
20
3V3
220
R13
C12
100nF
R10
10k
3V3
BL220G
1
3
5
7
9
11
13
15
17
19
P2
BUTTON
C11
100nF
VSSA
PC3
PC2
PC1
PC0
PA3
PA1
2
LED_ACTIVE
2.3V
C14
100nF
GME 960-024
1
LD1
C13
100nF
C7
100nF
3V3
PA2
PA0
I2S2_WS
I2S2_CK
I2S2_SD
I2S2_MCK
I2C1_SDA
I2C1_SCL
USB5V
Figure 1.
2
1
1
USB5V
Schematic diagrams
STEVAL-CCA021V1
Schematic diagrams
Schematic diagram of the STM32F103RE-based controller board
GNDA
100nF
C34
GND
5V0
GND
5V0
GND
5V0
C36
10uF/16V
C35
10uF/16V
C26
10uF/16V
GND
STBY_R
STBY_L
DAC_STBY
SPK_STBY
C16
100nF
VCCA
MICRO_SHDN
MICRO_OUT
2
1
KEEG1542PBL
U5
GNDA
C27
1uF
GND
R6
5V0
2
4
6
8
10
12
14
16
18
20
LED1
1
3
5
7
9
11
13
15
17
19
680
P1
GNDA
R12
1K
R11
1K
100nF
C19
100nF
C20
GND
DAC_FMT1
2.0V
Bias
IN-
VCCA
GNDA
10K
R20
STDBY
Bias
G
MICRO_SHDN
2
BYPS
GNDA
16
9
OUT-
DAC
DAC
17
100pF
100pF
C23
C18
LDO
GAIN
R15
10K
LDO
1uF
1uF
GND
C3
C2
OUT+
Filters
Digital
GND
Control Interface
1uF
5V0
5V0
Microphone Pre-Amplifier
ST: TS472IQT
10
5
IN+
Audio
Digital
PCP
NCP
GND
Interface
DAC_STBY
FMT1
FMT2
MCLK
VCCA
C17
100nF
GND
8
8
7
6
R8
10K
GNDA
R7
10K
DAC_MCLK
BCLK
SDAT
4
5
DAC_SDAT
DAC_BCLK
LRCLK
3
DAC_LRCLK
DAC_FMT2
G0
G1
DAC_LRCLK
DAC_BCLK
DAC_SDAT
DAC_MCLK
DAC_FMT2
DAC_FMT1
5V0
9
GND
LED_RED_0805
13
2
C29
1uF
GNDA
U4
GND
DAC
18
C1
GNDA
10
14
VREGD
Controller Board Connector
GND
22
GNDA
15
VREGA
GNDA
C4
Rout
Lout
U1
R5
R17
68
C28: Assembly 0R resistor for DC coupling
MICRO_OUT
R3
100K
GNDA
GND
C14
2n2
820
820
R4
GND
C10
2n2
Microphone
11
12
1uF GND
0R/22nF
C28
GNDA
16
19
GND
GNDD
1
E-PAD
VCCA
4
20
Vcc
15
C1
C12
R9
10K
GND
220n
C13
GND
C24
1uF
GND
100nF
100nF
C22
R13
10K
C25
100nF
5V0
150k
R16
150k
R14
STBY R
STBY L
RIN -
RIN +
G1
G0
LIN -
LIN +
Select
Gain
Select
Gain
Control
Standby
GND
GND
5V0
C6
1uF
IN-
IN+
STBY
GND
150K
150K
Internal
Bias
Oscillator
PWM
STEVAL-CCA021V1
TS4657 Audio Card
ST: TS4962IQT
4
3
1
300K
5V0
C7
100nF
5V0 5V0
GND
GND
5V0 GND
PWM
Oscillator
PWM
Mono Class D Amplifier
Channel Standby
8
7
19
20
1
GND
R10
10K
STBY_R
SPK_STBY
C21
17
16
Gain Control
G0 15
R2
10K
GND
STBY_L
GND
GND
220n
C15
GND
G1
R1
10K
GND
220n
C11
220n
GND
J3
RCA WBTOR 1
GND
GND
J1
RCA WBTOR 1
C5
1uF
18
VCCD
STBY
20
14
C2
PGND
4
GNDD
17
9
AV CC
NC
21
3
AGND
13
PV CC
PGND
12
6
OUTPUT
H
BRIDGE
VCCA
Bridge
H
Bridge
H
OUT-
OUT+
8
5
U3
ROUT-
ROUT+
LOUT-
LOUT+
L5
L6
C33
100pF
GND
Speaker
BLM18EG221SN1
100pF
C32
GND
C31
100pF
Terminal Block
2
1
P3
J4
Lumberg 1503 06
Mono Jack
GND
100pF
C30
GND
External
Speakers
BLM18EG221SN1
L4
Terminal Block
1
2
P2
100pF
C8
C9
100pF
GND
BLM18EG221SN1
L3
BLM18EG221SN1
L2
BLM18EG221SN1
L1
BLM18EG221SN1
11
14
5
2
U2
ST: TS2012IQT
Stereo Class D Amplifier
E-PAD
PV CC
2
7
GNDA
21
9
E-PAD
Doc ID 16318 Rev 1
KSSG1708
U6
2
1
Figure 2.
21
STEVAL-CCA021V1
Schematic diagrams
Schematic circuit of the TS4657-based audio board
3/5
Revision history
2
STEVAL-CCA021V1
Revision history
Table 1.
4/5
Document revision history
Date
Revision
29-Sep-2009
1
Changes
Initial release.
Doc ID 16318 Rev 1
STEVAL-CCA021V1
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