TAS2563 datasheet(34/127 Pages) TI

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Table 8-7. Shutdown Control (continued)

SDZ_TIMEOUT[1:0]

SETTING

23.8 ms

When SDZ is released, the device will sample the AD0 and AD1 pins and enter the software shutdown mode.

8.3.11.2 Software Shutdown

Software Shutdown mode powers down all analog blocks required to playback audio, but does not cause the

device to loose register state. Software Shutdown is enabled by asserting the MODE[1:0] register bits to 2'b10. If

audio is playing when Software Shutdown is asserted, the Class-D will volume ramp down before shutting down.

When deasserted, the Class-D will begin switching and volume ramp back to the programmed digital volume

setting.

8.3.11.3 Mute

The TAS2563 will volume ramp down the Class-D amplifier to a mute state by setting the MODE[1:0] register bits

to 2'b01. During mute the Class-D still switches, but transmits no audio content. If mute is deasserted, the device

will volume ramp back to the programmed digital volume setting.

8.3.11.4 Active

In Active Mode the Class-D switches and plays back audio. Speaker voltage and current sensing are operational

if enabled. Set the MODE[1:0] register bits to 2'b00 to enter active mode.

8.3.11.5 Perform Load Diagnostics

In Load Diagnostics Mode, TAS2563 checks the speaker terminal for an open or short. This can be used to

determine if a problem exists with the speaker or trace to the speaker. The entire operation is performed by the

TAS2563 and results reported using the IRQZ pin or read over I2C bus on completion. Set the MODE[1:0]

8.3.11.6 Mode Control and Software Reset

The TAS2563 mode can be configured by writing the MODE[1:0] bits.

Table 8-8. Mode Control

MODE[1:0]

SETTING

Section 8.3.11.4

Section 8.3.11.3

Section 8.3.11.2 (default)

Section 8.3.11.5

A software reset can be accomplished by asserting the SW_RESET bit, which is self clearing. This will restore all

registers to their default values.

Table 8-9. Software Reset

SW_RESET

SETTING

Don't reset (default)

TAS2563

SLASET3B – FEBRUARY 2020 – REVISED DECEMBER 2020

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