STA381BWS datasheet(63/171 Pages) STMICROELECTRONICS

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STA381BWS

Doc ID 018937 Rev 6

63/171

Table 6:

6.16

Configuration register D (addr 0x14)

6.16.1

DSP bypass

Setting the DSPB bit bypasses the EQ function of the STA381BWS.

6.16.2

Post-scale link

Post-scale functionality can be used for power-supply error correction. For multi-channel

applications running off the same power supply, the post-scale values can be linked to the

value of channel 1 for ease of use and in order to update the values faster.

6.16.3

Biquad coefficient link

For ease of use, all channels can use the biquad coefficients loaded into the channel 1

coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to

be performed once.

Table 38.

Compensating pulse size

CSZ[3:0]

Compensating pulse size

0000

0 ns (0 ticks) compensating pulse size

0001

20 ns (1 tick) clock period compensating pulse size

……

1111

300 ns (15 ticks) clock period compensating pulse size

SME

ZDE

Reserved

BQL

PSL

DSPB

Reserved

Table 39.

DSP bypass

Bit

R/W

RST

Name

Description

R/W

DSPB

0: Normal operation

1: Bypass of biquad and bass/treble functions

Table 40.

Post-scale link

Bit

R/W

RST

Name

Description

R/W

PSL

0: Each channel uses individual post-scale values

1: Each channel uses channel 1 post-scale values

Table 41.

Biquad coefficient link

Bit

R/W

RST

Name

Description

4R/W

BQL

0: Each channel uses coefficient values

1: Each channel uses channel 1 coefficient values

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