Master/Slave Mode Operation; 2.5.1 Master Mode; 2.5.2 Slave Mode; Evm Default Configuration - Texas Instruments TAS3308EVM User Manual

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The digital audio outputs can be to I
connector J9. There are two SPDIF output options. One SPDIF output can be produced by the TAS3308
on SDOUT2. This is set by a TAS3308 I
OPTO3. The other SPDIF output is the SDOUT1 output that is converted into SPDIF format by an external
encoder. This is output on OPTO4.
The TAS3308 has an optical SPDIF input from OPTO2. This is a pass though only connection to the
TAS3308 SDOUT2/SPDIF output on, OPTO3.
2.5

Master/Slave Mode Operation

The TAS3308EVM is delivered configured to operate in clock master mode. However, the TAS3308 can
be configured as a clock slave or master using JP3.
Jumper JP3 Pins
1, 2
2, 3

2.5.1 Master Mode

In master mode, the master clock, MCLK SCLK and LRCLK for the system are provided on J9. Data can
be input on the analog input and as I
2
SPDIF I S input from OPTO1 is not supported in master mode.
Data can be output from the I
when the SDOUT2 is configured for SPDIF output.

2.5.2 Slave Mode

In slave mode, data and clocks can be input in the SPDIF I
input is selected automatically when EVM detects a valid SPDIF signal on OPTO1. If the EVM does not
detect a valid SPDIF signal on OPTO1, then the I
In slave mode, the TAS3308 ADC requires an external clock input from the I
correct operation. The performance of the ADC is affected by the clock source jitter.
Data can be output from the I
when the SDOUT2 is configured for SPDIF output.
2.6

EVM Default Configuration

The TAS3308 is placed into the default configuration by receiving a reset. The TAS3308 receives a reset
from the power up circuitry, by pressing the Reset button, or by receiving a reset signal through the USB
interface. Following the receipt of reset, the TAS3308 EVM will load the contents of EEPROM2 and come
up with Mute enabled, clock master mode enabled, and the PWM outputs configured for Comb AD
modulation.
As described in this section, an example PurePath Studio GDE processing flow is supplied that configures
the TAS3308 to support a I
output and TAS5601 Power Stage for both master and slave mode.
SLEU093 – March 2008
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2
S or SPDIF format optical TOSLINK. The I
2
C register configuration option. This output is available on
Table 2-2. JP2 Clock Master/Slave Setting
2
S data on J1.
2
S outputs on J9, SPDIF I
2
S inputs are used.
2
S outputs on J9, SPDIF I
2
S digital PCM input, analog input, digital output, line output , headphone
Master/Slave Mode Operation
2
S output is provided on
2
I S Clock Mode
Slave
Master
2
S output, OPTO4, and from SPDIF SDOUT2
2
S IN, OPTO1, or the I
2
S IN or the SPDIF I
2
S output, OPTO4, and from SPDIF SDOUT2
2
S input, J1. The SPDIF
2
S IN for
Quick Setup Guide 15