TAS5760MD Datasheet, PDF (48/72 Pages) Texas Instruments – Check for Samples: TAS5760MD

TAS5760MD
SLOS741C – MAY 2013 – REVISED MARCH 2015
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5. Configure the device via the control port in the manner required by the use case, making sure to mute the
device via the control port
6. Once power supplies and clocks are stable and the control port has been programmed, bring SPK_SD HIGH
7. Unmute the device via the control port
8. The device is now in normal operation
NOTE
Control port register changes should only occur when the device is placed into shutdown.
This can be accomplished either by pulling the SPK_SD pin LOW or clearing the SPK_SD
bit in the control port.
9.2.1.2.2 Shutdown Procedures- Software Control Mode
1. The device is in normal operation
2. Mute via the control port
3. Pull SPK_SD LOW
4. The clocks can now be stopped and the power supplies brought down
5. The device is now fully shutdown and powered off
NOTE
Any control port register changes excluding volume control changes should only occur
when the device is placed into shutdown. This can be accomplished either by pulling the
SPK_SD pin LOW or clearing the SPK_SD bit in the control port.
9.2.1.2.3 Component Selection and Hardware Connections
Figure 53 details the typical connections required for proper operation of the device. It is with this list of
components that the device was simulated, tested, and characterized. Deviation from this typical application
circuit unless recommended by this document may produce unwanted results, which could range from
degradation of audio performance to destructive failure of the device.
9.2.1.2.3.1 I²C Pullup Resistors
It is important to note that when the device is operated in Software Control Mode, the customary pullup resistors
are required on the SCL and SDA signal lines. They are not shown in the Typical Application Circuits, because
they are shared by all of the devices on the I²C bus and are considered to be part of the associated passive
components for the System Processor. These resistor values should be chosen per the guidance provided in the
I²C Specification.
9.2.1.2.3.2 Digital I/O Connectivity
The digital I/O lines of the TAS5760MD are described in previous sections. As discussed, whenever a static
digital pin (that is a pin that is hardwired to be HIGH or LOW) is required to be pulled HIGH, it should be
connected to DVDD through a pullup resistor to control the slew rate of the voltage presented to the digital I/O
pins. It is not, however, necessary to have a separate pullup resistor for each static digital I/O line. Instead, a
single resistor can be used to tie all static I/O lines HIGH to reduce BOM count. For instance, if Software Control
Mode is desired both the GAIN[1:0] and the PBTL/SCL pins can both be pulled HIGH through a single pullup
resistor.
9.2.1.2.4 Recommended Startup and Shutdown Procedures
The start up and shutdown procedures for both Hardware Control Mode and Software Control Mode are shown
below.
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