STA382BW datasheet(145/172 Pages) STMICROELECTRONICS

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STA382BW

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7.16.3

Extended attack rate

The attack rate shown in Table 148 can be extended to provide up to an 8 dB/ms attack rate

on both limiters.

Table 157.

Extended attack rate, limiter 1

Table 158.

Extended attack rate, limiter 2

7.16.4

Extended BIQUAD selector

Bass and treble controls can be configured as user-defined filters when the equalization

coefficients link is activated (BQL = 1) and the corresponding BQx bit is set to 1.

Table 159.

Extended biquad selector, biquad 5

Table 160.

Extended biquad selector, biquad 6

Table 161.

Extended biquad selector, biquad 7

When filters from the 5th to 7th are configured as user-programmable, the corresponding

coefficients are stored respectively in addresses 0x20-0x24 (BQ5), 0x25-0x29 (BQ6), 0x2A-

0x2E (BQ7) as given in Table 154.

Note:

BQx bits are ignored if BQL = 0 or if DEMP = 1 (relevant for BQ5) or CxTCB = 1 (relevant for

BQ6 and BQ7).

XAR1

Mode

Limiter1 attack rate is configured using Table 148

Limiter1 attack rate is 8 dB/ms

XAR2

Mode

Limiter2 attack rate is configured using Table 148

Limiter2 attack rate is 8 dB/ms

BQ5

Mode

Reserved

User-defined biquad 5 coefficients are selected

BQ6

Mode

Pre-set bass filter selected as per Table 147

User-defined biquad 6 coefficients are selected

BQ7

Mode

Pre-set treble filter selected as per Table 147

User-defined biquad 7 coefficients are selected

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