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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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WM8994ECS/R 数据表(PDF) 235 Page - Cirrus Logic |
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WM8994ECS/R 数据表(HTML) 235 Page - Cirrus Logic |
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235 / 363 page  WM8994 Rev 4.6 235 POWER MANAGEMENT The WM8994 has control registers that allow users to select which functions are active. For minimum power consumption, unused functions should be disabled. To minimise pop or click noise, it is important to enable or disable functions in the correct order. See “Control Write Sequencer” for details of recommended control sequences. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R1 (0001h) Power Management (1) 13 SPKOUTR_ENA 0 SPKMIXR Mixer, SPKRVOL PGA and SPKOUTR Output Enable 0 = Disabled 1 = Enabled 12 SPKOUTL_ENA 0 SPKMIXL Mixer, SPKLVOL PGA and SPKOUTL Output Enable 0 = Disabled 1 = Enabled 11 HPOUT2_ENA 0 HPOUT2 and HPOUT2MIX Enable 0 = Disabled 1 = Enabled 9 HPOUT1L_ENA 0 Enables HPOUT1L input stage 0 = Disabled 1 = Enabled 8 HPOUT1R_ENA 0 Enables HPOUT1R input stage 0 = Disabled 1 = Enabled 5 MICB2_ENA 0 Microphone Bias 2 Enable 0 = Disabled 1 = Enabled 4 MICB1_ENA 0 Microphone Bias 1 Enable 0 = Disabled 1 = Enabled 2:1 VMID_SEL [1:0] 00 VMID Divider Enable and Select 00 = VMID disabled (for OFF mode) 01 = 2 x 40k divider (Normal mode) 10 = 2 x 240k divider (Standby mode) 11 = Reserved 0 BIAS_ENA 0 Enables the Normal bias current generator (for all analogue functions) 0 = Disabled 1 = Enabled |
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