Download DEM-PCM2901/2903 EVM

User’s Guide
August 2002
DAV Digital Audio/Speaker
SLEU023
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Copyright  2002, Texas Instruments Incorporated
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Texas Instruments
Post Office Box 655303
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Copyright  2002, Texas Instruments Incorporated
EVM WARNINGS AND RESTRICTIONS
It is important to operate this EVM within the input voltage range of 5 V and the output voltage
range of 5 V.
Exceeding the specified input range may cause unexpected operation and/or irreversible
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During normal operation, some circuit components may have case temperatures greater than
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as the input and output ranges are maintained. These components include but are not limited
to linear regulators, switching transistors, pass transistors, and current sense resistors. These
types of devices can be identified using the EVM schematic located in the EVM User’s Guide.
When placing measurement probes near these devices during operation, please be aware
that these devices may be very warm to the touch.
Mailing Address:
Texas Instruments
Post Office Box 655303
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Copyright  2002, Texas Instruments Incorporated
Contents
Contents
1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2
Connectors and Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3
Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4
LED Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-2
1-2
1-2
1-2
2
Schematic and Printed-Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
2.1
DEM-PCM2901/2903 Printed-Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2
DEM-PCM2901/2903 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figures
1–1
2–1
2–2
2–3
2–4
DEM-PCM2901/2903 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM2901/2903 Silkscreen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM2901/2903 Top View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM2901/2903 Bottom View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DEM-PCM2901/2903 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
2-2
2-2
2-3
2-4
iii
Contents
iv
Chapter 1
Description
The DEM-PCM2901 and DEM-PCM2903 are evaluation boards for Texas
Instruments’ newly developed USB interface codecs, PCM2901 and
PCM2903. The DEM-PCM2901 includes a PCM2901. It is a self-powered
USB codec without an S/PDIF interface. The DEM-PCM2903 includes a
PCM2903. It is a self-powered USB codec with an S/PDIF interface.
A USB connector is mounted on the DEM-PCM2901/2903. Connecting a USB
interface to this USB connector enables the evaluation of codec performance.
The DEM-PCM2901/2903 requires a 5-V power supply for the codec and
S/PDIF sections and a 5-V power supply for the analog input/output amplifier
section.
Stereo audio output is available on two RCA jacks.
The PCM2901/2903 supports the following USB features:
-
Fully compliant with the USB 1.1 specification
Full-speed transceivers
Partially programmable descriptors
USB adaptive mode for playback
USB asynchronous mode for record
Self-powered
Topic
Page
1.1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.2
Connectors and Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.3
Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1.4
LED Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
1-1
Block Diagram
1.1 Block Diagram
Figure 1–1. DEM-PCM2901/2903 Block Diagram
CN001
GND +5V
S/PDIF IN
TORX
CN002
S/PDIF OUT
JP
TOTX
3.3 V
REG
Vdd
AND
GATE
CN003
USB Interface
USB
Connector
Analog Out
Vcc
D+/–
12M XTAL
Rch
Analog In
OPA2353
LPF
VINL/R
SW001 – SW003
Lch
OPA2353
LPF
DIN
VOUTL/R
DOUT
PCM2901
PCM2903
VBUS
Lch
Rch
SSPND
Operation Control
1.2 Connectors and Jumpers
- CN001
: Power supply, 5 V
- CN002
: Jumper (connecting regulated 3.3 V)
- CN003
: USB port (series B connector), connects to USB cable/
connector
- CN101, CN102 : Audio LINE OUT (RCA, 1.98 VPP full scale)
- CN103, CN104 : Audio LINE IN (RCA, 1.98 VPP full scale)
- U002
: S/PDIF In (DEM-PCM2903 only)
- U003
: S/PDIF Out (DEM-PCM2903 only)
1.3 Switch Settings
- SW001: HID key state (mute)
- SW002: HID key state (volume up)
- SW003: HID key state (volume down)
These switches should be set to LOW logic level for software control, or
toggled HIGH for manual control of their respective parameters.
1.4 LED Monitor
- D001 (Red): Indicates suspend state
1-2
Chapter 2
Schematic and Printed-Circuit Board
This chapter presents the DEM-PCM2901/2903 printed-circuit board and
schematic.
Topic
Page
2.1
DEM-PCM2901/2903 Printed-Circuit Board . . . . . . . . . . . . . . . . . . . . . . 2-2
2.2
DEM-PCM2901/2903 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Schematic and Printed-Circuit Board
2-1
DEM-PCM2901/2903 Printed-Circuit Board
2.1 DEM-PCM2901/2903 Printed-Circuit Board
Figure 2–1. DEM-PCM2901/2903 Silkscreen
Figure 2–2. DEM-PCM2901/2903 Top View
2-2
DEM-PCM2901/2903 Printed-Circuit Board
Figure 2–3. DEM-PCM2901/2903 Bottom View
Schematic and Printed-Circuit Board
2-3
OUT IN
GND
1
+
2
C105
330 pF
1
C101
10 µF/16 V
J
+
B
S
CN004 DC JACK
YKB31–0016
(MAX 6.3 V)
C008
1 2 4 5
U003
TOTX179P
3 0.1 µF
C009
10 µF/16 V
C005
0.1 µF
C003
100 µF/16 V
R101
12 kΩ
R103
3.9 kΩ
+
C103
1800 pF
CN003
67068–0001
(GND)
(DP)
(DM)
(VBUS)
4
3
2
1
R107
100 Ω
CN101
RCA pj
C107
+ 10 µF/16 V
R106
12 kΩ
+
C011
0.1 µF
U101
OPA2353UA
1/2
2
–
1
3
+ 4
C010
0.1 µF
5 TC7SZ08AFE
1
U004
4
2
3
C106
330 pF
R005
470 Ω
R001
1.5 kΩ
R003
RA001
1.5 kΩ x 3
22 Ω
2
22 Ω
3
4
5
6
7
8
SW001
SW002
SW003
FT1D-2M FT1D-2M FT1D-2M
C012
1.0 µF/16 V
9
10
+
11
12
13
14
+
D+
SSPND
D–
VDDI
VBUS
DGND
DGNDU
DOUT
HID0
HID1
HID2
SEL0
SEL1
DIN
PCM2901/03
R006
1 MΩ
VCCI
AGNDX
XTI
XTO
VCCI
AGNDC
VCCI
AGNDP
VINL
VCCI
VINR
VOUTL
VCOM
VOUTR
C013
10 µF/16 V
+
D001
TLR218P
U005
1
R002
C102
10 µF/16 V
(C016)
R104
3.9 kΩ
C104
1800 pF
6
5
27
Q001
DTA143ESA
+
26
24
23 (C018) C019
18 pF
22
X001
12 MHz
21
R004
20
19
1 MΩ
7
R108
100 Ω
CN102
RCA pj
+
C110
330 pF
C020
18 pF
C108
R109
10 µF/16 V
100 Ω
+
8
–
7
+
C116
10 µF/16 V
U102
OPA2353UA
1/2
(C017)
18
8
R111
12 kΩ
C015
10 µF/16 V
25
–
U101
OPA2353UA
2/2
28
+
6
R113
3.9 kΩ
C114
R115
10 µF/16 V
12 kΩ
CN103
RCA pj
+
5
C112
1800 pF
17
R112
12 kΩ
16
15
C111
330 pF
+
C014
10 µF/16 V
C109
R110
10 µF/16 V
100 Ω
+
NOTE: On the PCM2901, pin 24 and pin 25 are test pins.
R102
12 kΩ
1
U102 4
OPA2353UA
2/2
–
+
2
R114
3.9 kΩ
C115
R116
10 µF/16 V
12 kΩ
+
3
C113
1800 pF
CN104
RCA pj
DEM-PCM2901/2903 Schematic
+
C004
0.1 µF
2.2 DEM-PCM2901/2903 Schematic
2 3 4 5
U002
TORX179P
1
C007
10 µF/16 V
R105
12 kΩ
Figure 2–4. DEM-PCM2901/2903 Schematic
2-4
CN001 B2P–VH
CN002
FFC-12BMEP1
U001
C006 REG1117–3.3
10 µF/16 V 2
3