Evaluation Board User Guide UG-040
Rev. 0 | Page 3 of 32
SETTING UP THE EVALUATION BOARD
STANDALONE MODE
It is possible to run the board and the AD1937/AD1939 codec
in standalone mode, which fixes the functionality of the
AD1937/AD1939 into the I2S data format, running at 256 × fS
(default register condition). The ADC BCLK and LRCLK ports
are flipped between slave and master (input and output) by
tying SDA/COUT (Pin 31) to low or high. This is accomplished
by moving the J5 jumper to either 0 or SDA/1 (see Figure 2 and
Figure 3).
08411-002
0
SDA/1
COUT
0
1
CIN
J6 J8J7
ADDR1ADDR0
J5
0
SCL
CCLK
0
1
CLATCH
Figure 2. Standalone Slave Mode
08411-003
0
SDA/1
COUT
0
1
CIN
J6 J8J7
ADDR1ADDR0
J5
0
SCL
CCLK
0
1
CLATCH
Figure 3. Standalone Master Mode
With the control jumpers set to standalone slave mode, all of S2
and S3 set to off, and both mode switches (S4 and S5) set to 0.
The S/PDIF receiver is the LRCLK, BCLK, and SDATA source.
The default MCLK jumper setting routes MCLK from the
S/PDIF receiver to the AD1937/AD1939. With a valid S/PDIF
data stream connected to a selected S/PDIF input port, the
board passes audio from the S/PDIF port to all four stereo
outputs and from Stereo IN1 to the S/PDIF output ports. IN2
can be selected by changing S3, Position 8, to on. Other serial
audio clock and data routing configurations are described in the
Switch and Jumper Settings section.
SPI AND I2C CONTROL
The evaluation board can be configured for interactive control
of the registers in the AD1937/AD1939 by connecting the SPI
or I2C port to the USBi. SPI and I2C jumper settings are shown
in Figure 4 and Figure 5. All part variations are SPI (for the
AD1939). Note that the Automated Register Window Builder
software controls the AD1937 (I2C) only when the ADDR
jumpers are set to 00 and the correct .xml file is loaded.
08411-004
0
SDA/1
COUT
0
1
CIN
J6 J8J7
ADDR1ADDR0
J5
0
SCL
CCLK
0
1
CLATCH
Figure 4. SPI Control
08411-005
0
SDA/1
COUT
0
1
CIN
J6 J8J7
ADDR1ADDR0
J5
0
SCL
CCLK
0
1
CLATCH
Figure 5. I2C Control
The Automated Register Window Builder controls the
AD1937/AD1939 and is available at www.analog.com/AD1937
or www.analog.com/AD1939.
AUTOMATED REGISTER WINDOW BUILDER
SOFTWARE INSTALLATION
The Automated Register Window Builder is a program that
launches a graphical user interface for direct, live control of the
AD1937/AD1939 registers. The GUI content for a part is
defined in a part-specific . xml file; these files are included in
the software installation. To install the Automated Register
Window Builder software, follow these steps:
1. At www.analog.com/AD1937 or www.analog.com/AD1939,
find the Resources & Tools list.
2. In the list, find Evaluation Boards & Development Kits
and click Evaluation Boards/Tools to open the provided
ARWBvXX.zip file.
3. Double-click the provided .msi file to extract the files to an
empty folder on your PC.
4. Then double-click setup.exe and follow the prompts to
install the Automated Register Window Builder. A
computer restart is not required.
5. Copy the .xml file for the AD1937/AD1939 from the
extraction folder into the C:\Program Files\Analog Devices
Inc\AutomatedRegWin folder, if it does not appear in the
folder after installation.
HARDWARE SETUP—USBi
To set up the USBi hardware, follow these steps:
1. Plug the USBi ribbon cable into the J1 header.
2. Connect the USB cable to your computer and to the USBi.
3. When prompted for drivers, follow these steps:
a. Choose Install from a list or a specific location.
b. Choose Search for the best driver in these locations.
c. Check the box Include this location in the search.
d. Find the USBi driver in C:\Program Files\Analog
Devices Inc\AutomatedRegWin\USB drivers.
e. Click Next.
f. If prompted to choose a driver, select CyUSB.sys.
g. If the PC is running Windows XP and you receive a
message that the software has not passed Windows
logo testing, click Continue Anyway.
