User Manual

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OVERSAMPLING RATE CONTROL

VCOM OUTPUT

TPA3200D1

SLOS442A – MAY 2005 – REVISED JULY 2005

The digital functions of the TPA3200D1 are controlled by 4 terminals. Table 2 shows selectable data formats,

Table 3 shows de-emphasis control, Table 4 shows mute control, and Table 5 shows channel-output select.

Table 2. Data Format Select

FMT (PIN 43) DATA FORMAT

LOW 16- to 24-bit, I

S format

HIGH 16-bit right-justified

Table 3. De-Emphasis Control

DEMP (PIN 41 ) DE-EMPHASIS FUNCTION

LOW 44.1 kHz de-emphasis OFF

HIGH 44.1 kHz de-emphasis ON

Table 4. Mute Control

MUTE (PIN 42 ) MUTE

LOW Mute OFF

HIGH Mute ON

Table 5. Channel Output Select

LR_SEL (PIN 7 ) ACTIVE CHANNEL

(1)

LOW Right

HIGH Left

(1) A digital data stream consists of two channels of data. In an I

S or

right-justified data stream, the left-channel data precedes the

right-channel data (See Figure 20 ). The LR_SEL input selects the

channel to send to the mono output.

The TPA3200D1 automatically controls the oversampling rate of the delta-sigma D/A converters with the system

clock rate. The oversampling rate is set to 64× oversampling with every system clock and sampling frequency.

One unbuffered common-mode voltage output pin, VCOM (pin 10) is brought out for decoupling purposes. This

pin is nominally biased to a dc voltage level equal to 0.5 × V

. This pin cannot be used to bias external circuits.