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STA339BWS 数据表(PDF) 70 Page - STMicroelectronics |
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STA339BWS 数据表(HTML) 70 Page - STMicroelectronics |
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70 / 79 page ![]() Register description STA339BWS 70/79 DocID015276 Rev 9 When filters from 5th to 7th are configured as user-programmable, the corresponding coefficients are stored respectively in addresses 0x14-0x18 (BQ5), 0x19-0x1D (BQ6) and 0x1E-0x22 (BQ7) as in Table 72 on page 61. Note: BQx bits are ignored if BQL = 0 or if DEMP = 1 (relevant for BQ5) or CxTCB = 1 (relevant for BQ6 and BQ7). 7.14 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. Bit BQ5 description BQ5 Mode 0 Preset de-emphasis filter selected 1 User defined biquad 5 coefficients are selected Table 81. Bit BQ6 description BQ6 Mode 0 Preset bass filter selected as per Table 65 1 User defined biquad 6 coefficients are selected Table 82. Bit BQ7 description 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 Reserved SVUPE SVUP[4] SVUP[3] SVUP[2] SVUP[1] SVUP[0] 00 00 00 0 0 D7 D6 D5 D4 D3 D2 D1 D0 Reserved Reserved SVDWE SVDW4] SVDW[3] SVDW[2] SVDW[1] SVDW[0] 00 00 00 0 0 Table 83. Bit SVUPE description SVUPE Mode 0 When volume is increased, use the default rate 1 When volume is increased, use the rates defined by SVUP[4:0] |
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