STA321MPL1 datasheet(40/80 Pages) STMICROELECTRONICS

40 / 80 page

Registers

STA321MPL1

40/80

DocID029389 Rev 1

5.2.36

EGEQ - graphic EQ 8-kHz band (0x27)

5.2.37

Biquad internal channel loop-through (0x28)

Each internal processing channel can receive two possible inputs at the input to the biquad

block. The input can come either from the output of that channel’s MIX#1 engine or from the

output of the bass/treble (biquad #10) of the previous channel. In this scenario, channel 1

receives channel 8. This enables the use of more than 10 biquads on any given channel at

the loss of the number of separate internal processing channels.

EGEQ4

EGEQ3

EGEQ2

EGEQ1

EGEQ0

xGEQ[4:0]

Boost / cut

11111

11110

11101

……

10000

01111

01110

-1

……

00001

-14

00000

-15

C8BLP

C7BLP

C6BLP

C5BLP

C4BLP

C3BLP

C2BLP

C1BLP

000

Bit

RST

Name

Description

7:0

CnBLP

For n = 1 to 8:

0: input from channel n MIX#1 engine output - normal

operation

1: input from channel (n - 1) biquad #10 output - loop

operation.

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