STA333BW datasheet(44/64 Pages) STMICROELECTRONICS

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STA333BW

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6.9.1

Tone control bypass

Tone control (bass/treble) can be bypassed on a per channel basis for channels 1 and 2.

CxTCB:

0: perform tone control on channel X, normal operation

1: bypass tone control on channel X

6.9.2

EQ bypass

EQ control can be bypassed on a per channel basis for channels 1 and 2. If EQ control is

bypassed on a given channel the prescale and all filters (high-pass, biquads, de-emphasis,

bass, treble in any combination) are bypassed for that channel.

CxEQBP:

0: perform EQ on channel X, normal operation

1: bypass EQ on channel X

6.9.3

Volume bypass

Each channel contains an individual channel volume bypass. If a particular channel has

volume bypassed via the CxVBP = 1 register then only the channel volume setting for that

particular channel affects the volume setting, the master volume setting will not affect that

channel.

6.9.4

Binary output enable registers

Each individual channel output can be set to output a binary PWM stream. In this mode

output A of a channel is considered the positive output and output B is negative inverse.

CxBO:

0: DDX tri-state output, normal operation

1: binary output

6.9.5

Limiter select

Limiter selection can be made on a per-channel basis according to the channel limiter select

bits.

C3OM1

C3OM0

C3LS1

C3LS0

C3BO

C3VPB

000

Table 21.

Channel limiter mapping as a function of CxLS bits

CxLS[1:0]

Channel limiter mapping

Channel has limiting disabled

Channel is mapped to limiter #1

Channel is mapped to limiter #2

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