sta381bw STMicroelectronics, sta381bw Datasheet - Page 143

• Manufacturer Part Number: sta381bw
• Description: Sound Terminal 2.1-channel High-efficiency Digital Audio System
• Manufacturer: STMicroelectronics

STA381BW
7.16.3
7.16.4
Note:
Extended attack rate
The attack rate shown in
on both limiters.
Table 155. Extended attack rate, limiter 1
Table 156. Extended attack rate, limiter 2
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 157. Extended biquad selector, biquad 5
Table 158. Extended biquad selector, biquad 6
Table 159. 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 in
BQx bits are ignored if BQL = 0 or if DEMP = 1 (relevant for BQ5) or CxTCB = 1 (relevant for
BQ6 and BQ7).
XAR1
XAR2
BQ5
BQ6
BQ7
0
1
0
1
0
1
0
1
0
1
Table
152.
Table 146
Limiter1 attack rate is configured using
Limiter1 attack rate is 8 dB/ms
Limiter2 attack rate is configured using
Limiter2 attack rate is 8 dB/ms
Reserved
User-defined biquad 5 coefficients are selected
Pre-set bass filter selected as per
User defined biquad 6 coefficients are selected
Pre-set treble filter selected as per
User defined biquad 7 coefficients are selected
Doc ID 018835 Rev 2
can be extended to provide up to an 8 dB/ms attack rate
Register description: Sound Terminal compatibility
Mode
Mode
Mode
Mode
Mode
Table 145
Table 145
Table 146
Table 146
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