STA381BWS datasheet(35/171 Pages) STMICROELECTRONICS

35 / 171 page

STA381BWS

Device overview

Doc ID 018937 Rev 6

35/171

Figure 13.

Stereo link block diagram

4.3.9

Programming of coefficients

The coefficients are expressed in different value ranges and in decimal notation (refer to the

previous paragraphs). In order to be programmed they must be converted into a

[-1, +1) range and in hexadecimal notation (Table 11). This can be achieved with the

following procedure:

●

if CoeffDecValue>0

●

if CoeffDecValue<0

where CoeffI2CValue is the final decimal value to be converted into hexadecimal notation

while CoeffDecValue is the coefficient value (in decimal notation) to start from.

Output

Ch 0

Attenuator

From mapper

Ch 0 – Band 0

Attenuator

From mapper

Ch 0 – Band 1

Attenuator

Ch 0 – Band 1

Ch 0 – Band 0

Output

Ch 1

Attenuator

From mapper

Ch 1 – Band 0

Attenuator

From mapper

Ch 1 – Band 1

Attenuator

Ch 1 – Band 1

Ch 1 – Band 0

Max

Attenuation

Band 0

Max

Attenuation

Band 1

CoeffI2CValue

rnd CoeffDecValue 2

⁄

() 2

()

CoeffI2CValue

rnd CoeffDecValue 2

⁄

() 2

()

–

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