TAS3202 datasheet(11/69 Pages) TI2

11 / 69 page

TAS3202

www.ti.com

SLES208B – JUNE 2009 – REVISED MARCH 2011

3.6

Power Down (PDN)

The TAS3202 supports a number of power-down modes.

PDN can be used to put the device into power-saving standby mode. In the default ROM configuration,

applying a logic low on this pin stops all clocks, powers down all analog circuitry, and ramps down volume

for all digital inputs. This mode is used to minimize power consumption while preserving register settings.

If the TAS3202 is successfully booted from an external EEPROM, the functionality of the pin is defined by

the user's application firmware.

Individual power down DAC and ADC – Both the DAC and the ADC can be powered down individually.

This feature is made available to the board controller via the I2C interface.

Power down of analog reference – The analog reference can be powered down if all DAC and ADCs

are powered down. This feature is made available to the board controller via the I2C interface.

3.7

2C Chip Select (CS0)

The TAS3202 has a control to specify the slave and master I2C address. This control permits up to two

TAS3202 devices to be placed in a system without external logic. GPIO pins are level sensitive. They are

not edge triggered.

See Section 6.3 for a complete description of this pin.

3.8

Programmable General-Purpose I/O (GPIO)

The TAS3202 has four general purpose input/output pins that can be programed by the user's application

firmware.

GPIO1 and GPIO2 pins are single-function I/O pins. Upon power up, GPIO1 is an input. If there is an

unsuccessful boot from an external EEPROM and GPIO1 is pulled high externally, the DAC output is

disabled. If there is an unsuccessful boot from an external EEPROM and GPIO1 is pulled low externally,

the DAC output is enabled. If there is a successful boot from an external EEPROM, GPIO1 will be

configured as an output and be driven logic low by the TAS3202 when the user's application code is

running.

GPIO3 and GPIO4 are dual function I/O pins. The functionality of GPIO pins must be defined by the user's

application code.

Mute and power-down functions have to be programmed in the EEPROM application code. These are

general-purpose input pins and are suggested for Mute and Powerdown functions. However, these

settings must be defined by the user's application code.

3.8.1

GPIO Pin Function After Device is Programmed

Once the TAS3202 has been programmed, either through a successful boot load or via slave I2C

download, the operation of GPIO is defined by ther user's application code.

3.9

Input and Output Serial Audio Ports

Serial data is input on SDINx on the TAS3202, allowing up to four channels of digital audio input. The

TAS3202 supports serial data in 16-, 20-, or 24-bit data in left, right, and I2S serial data formats. The

parameters for the clock and serial data interface input formats are I2C configurable.

Serial data is output on SDOUTx, allowing up to four channels of digital audio output. SDOUTx port

supports the same formats as the SDINx port. Output data rate is the same data rate as the input. The

SDOUTx output uses the SCLK_OUT and LRCLK_OUT signals to provide synchronization.

The TAS3202 supported data formats are listed in Table 3-1.

Physical Characteristics

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