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STA339BW 数据表(PDF) 69 Page - STMicroelectronics

部件名 STA339BW
功能描述  2.1-channel high-efficiency digital audio system
PDF  77 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA339BW 数据表(HTML) 69 Page - STMicroelectronics

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STA339BW
Register description
Doc ID 15251 Rev 5
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6.18.5
Extended BIQUAD selector
De-ephasis filter as well as bass and treble controls can be configured as user defined filters
when equalization coefficients link is activated (BQL = 1) and the corresponding BQx bit is
set to 1.
When filters from 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 Table 72.
Note:
BQx bits are ignored if BQL = 0 or if DEMP = 1 (relevant for BQ5) or CxTCB = 1 (relevant for
BQ6 and BQ7).
6.19
EQ soft volume configuration registers (addr 0x37 - 0x38)
Soft volume update has a fixed rate by default. Using register 0x37 and 0x38 it is possible to
override the default behavior allowing different volume change rates.
It is also possible to independently define the fade-in (volume is increased) and fade-out
(volume is decreased) rates according to the desired behavior.
Table 80.
De-emphasis filter setup
BQ5
Mode
0
Preset de-emphasis filter selected
1
User defined biquad 5 coefficients are selected
Table 81.
Bass filter setup
BQ6
Mode
0
Preset bass filter selected as per Table 65
1
User defined biquad 6 coefficients are selected
Table 82.
Treble filter setup
BQ7
Mode
0
Preset treble filter selected as per Table 65
1
User defined biquad 7 coefficients are selected
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
SVUPE
SVUP[4]
SVUP[3]
SVUP[2]
SVUP[1]
SVUP[0]
00
00
000
0
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
SVDWE
SVDW4]
SVDW[3]
SVDW[2]
SVDW[1]
SVDW[0]
00
00
000
0



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