STA308A datasheet(43/63 Pages) STMICROELECTRONICS

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STA308A

Registers

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7.2.42

Mix internal channel loop-through (0x29)

Each internal processing channel can receive two possible sets of inputs at the inputs to the

Mix#1 block. The inputs can come from the outputs of the interpolation block as normally

occurs (CnMXLP = 0) or they can come from the outputs of the Mix#2 block. This enables

the use of additional filtering after the second mix block at the expense of losing this

processing capability on the channel.

7.2.43

EQ bypass (0x2A)

EQ control can be bypassed on a per channel basis. If EQ control is bypassed on a given

channel the prescale and all 10 filters (high-pass, biquads, de-emphasis, bass management

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

7.2.44

Tone control bypass (0x2B)

Tone control (bass/treble) can be bypassed on a per channel basis. If tone control is

bypassed on a given channel the two filters that tone control utilizes are made available as

user programmable biquads #9 and #10.

C8MXLP

C7MXLP

C6MXLP

C5MXLP

C4MXLP

C3MXLP

C2MXLP

C1MXLP

Bit

RST

Name

Description

7:0

CnMXLP

For n = 1 to 8:

0: inputs to channel n MIX#1 engine from interpolation

outputs - normal operation

1: inputs to channel n MIX#1 engine from MIX#2 engine

outputs - loop operation.

C8EQBP

C7EQBP

C6EQBP

C5EQBP

C4EQCBP C3EQBP

C2EQBP

C1EQBP

Bit

RST

Name

Description

7:0

CnEQBP

For n = 1 to 8:

0: perform EQ on channel n - normal operation

1: bypass EQ on channel n.

C8TCB

C7TCB

C6TCB

C5TCB

C4TCB

C3TCB

C2TCB

C1TCB

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