User guide

Evaluation Board User Guide UG-564
Rev. 0 | Page 3 of 32
SETTING UP THE EVALUATION BOARD
STANDALONE MODE
The ADAU196xA has a standalone mode, which allows the
user to choose between a limited number of operation modes
without the need for a control interface. Applying a jumper
across JP21, as shown in Figure 2, pulls SA_MODE (Pin 46)
high enabling standalone mode in the ADAU196xA. The
SA_MODE selections are listed in Table 1.
Table 1. Standalone Modes
Pin Setting Description
Pin 42 0 Master serial audio interface
1 Slave serial audio interface
Pin 43 0 256 × f
S
1 384 × f
S
Pin 44 0 Reserved, set to 0
Pin 45 0 I
2
S mode
1 TDM mode
Pin 32 to Pin 31 00 TDM4, pulse
01 TDM8, pulse
10 TDM16, pulse
11 TDM8, 50% duty
On the E VA L-ADAU196xAZ, each of the four control port
pins of the ADAU196xA are brought out to a block of jumpers,
allowing the user to assign each pin to either the I
2
C or SPI
ports. In standalone mode, these jumpers can connect the
individual pins to high (IOVDD) or low (GND) to put the
ADAU196xA in the desired mode.
Figure 2. SA_MODE—Slave, 256 × f
S
, I
2
S
The E VA L-ADAU196xAZ arrives configured for S/PDIF input.
The S/PDIF receiver operates as a clock master, putting out an
I
2
S stream at 256 × f
S
. For quick startup, the ADAU196xA is in
standalone mode with the settings shown in Figure 2.
Pin 42 is pulled high (1) and Pin 43 to Pin 45 are pulled low
(0). According to Table 1, this puts the ADAU196xA in slave
mode, running at 256 × f
S
, and the audio serial port in I
2
S
mode. Looking at Figure 2, notice that the jumper for Pin 42
is beneath the label for 1 and the other pins are assigned to 0.
Figure 3. SA_MODE—Master, 384 × f
S
, TDM
Figure 3 shows the other options for each SA_MODE config-
uration pin; master mode, running at 384 × f
S
, and the audio
serial port in TDM mode. In the case where the ADAU196xA
is put in TDM mode, Pin 31 and Pin 32 can be pulled high
(IOVDD) or low (GND) to achieve the modes listed in Table 1.
The correct pins are located in the top left corner of Figure 3.
I
2
C AND SPI CONTROL
The evaluation board can be configured for live control over
the registers in the ADAU196xA. When the Automated Register
Window Builder software is installed and the USBi control
interface is plugged into the board, the software can control the
ADAU196xA. For this configuration, the ADAU196xA must
be assigned to I
2
C mode using Address 00. See Figure 4 for the
correct jumper positions.
11588-002
PIN 31
PIN 32
11588-003