ZHCUAN9C February 2013 – November 2023 TAS2505 , TAS2505-Q1
對于耳機(jī)輸出，模擬音量控制的范圍為 0dB 至 -78dB，步進(jìn)為 0.5dB，適用于大多數(shù)有用范圍及靜音，如表 3-10 所示。此音量控制包括軟步進(jìn)邏輯。
通過寫入頁 1 寄存器 22 位 D6–D0，可控制耳機(jī)模擬音量的改變。通過寫入頁 1 寄存器 12 位 D2，可通過混頻器 P 和混頻器 M 將信號從模擬音量控制的輸出路由到耳機(jī)功率放大器的輸入。
模擬音量控制軟步進(jìn)時(shí)間由頁 0 寄存器 63 位 D1–D0 進(jìn)行設(shè)置。
| 寄存器值 | 模擬衰減 (dB) | 寄存器值 | 模擬衰減 (dB) | 寄存器值 | 模擬衰減 (dB) | 寄存器值 | 模擬衰減 (dB) | |||
|---|---|---|---|---|---|---|---|---|---|---|
| ?0 | 0.0 | 30 | -15.0 | 60 | -30.1 | ?90 | -45.2 | |||
| ?1 | ?–0.5 | 31 | -15.5 | 61 | -30.6 | ?91 | -45.8 | |||
| ?2 | ?-1.0 | 32 | -16.0 | 62 | -31.1 | ?92 | -46.2 | |||
| ?3 | ?–1.5 | 33 | -16.5 | 63 | -31.6 | ?93 | -46.7 | |||
| ?4 | ?–2.0 | 34 | -17.0 | 64 | -32.1 | ?94 | -47.4 | |||
| ?5 | ?-2.5 | 35 | –17.5 | 65 | -32.6 | ?95 | -47.9 | |||
| ?6 | ?–3.0 | 36 | -18.1 | 66 | -33.1 | ?96 | -48.2 | |||
| ?7 | ?-3.5 | 37 | -18.6 | 67 | -33.6 | ?97 | -48.7 | |||
| ?8 | ?-4.0 | 38 | -19.1 | 68 | -34.1 | ?98 | -49.3 | |||
| ?9 | ?-4.5 | 39 | -19.6 | 69 | -34.6 | ?99 | -50.0 | |||
| 10 | ?-5.0 | 40 | -20.1 | 70 | -35.2 | 100 | -50.3 | |||
| 11 | ?-5.5 | 41 | -20.6 | 71 | -35.7 | 101 | -51.0 | |||
| 12 | ?-6.0 | 42 | -21.1 | 72 | -36.2 | 102 | -51.4 | |||
| 13 | ?-6.5 | 43 | -21.6 | 73 | -36.7 | 103 | -51.8 | |||
| 14 | ?-7.0 | 44 | -22.1 | 74 | -37.2 | 104 | -52.2 | |||
| 15 | ?–7.5 | 45 | -22.6 | 75 | -37.7 | 105 | -52.7 | |||
| 16 | ?-8.0 | 46 | -23.1 | 76 | -38.2 | 106 | -53.7 | |||
| 17 | ?–8.5 | 47 | -23.6 | 77 | -38.7 | 107 | -54.2 | |||
| 18 | ?-9.0 | 48 | -24.1 | 78 | -39.2 | 108 | -55.3 | |||
| 19 | ?–9.5 | 49 | -24.6 | 79 | -39.7 | 109 | -56.7 | |||
| 20 | -10.0 | 50 | -25.1 | 80 | -40.2 | 110 | -58.3 | |||
| 21 | -10.5 | 51 | -25.6 | 81 | -40.7 | 111 | -60.2 | |||
| 22 | -11.0 | 52 | -26.1 | 82 | -41.2 | 112 | -62.7 | |||
| 23 | -11.5 | 53 | -26.6 | 83 | -41.7 | 113 | -64.3 | |||
| 24 | -12.0 | 54 | -27.1 | 84 | -42.1 | 114 | -66.2 | |||
| 25 | -12.5 | 55 | -27.6 | 85 | -42.7 | 115 | -68.7 | |||
| 26 | -13.0 | 56 | -28.1 | 86 | -43.2 | 116 | -72.2 | |||
| 27 | –13.5 | 57 | -28.6 | 87 | -43.8 | 117–127 | -78.3 | |||
| 28 | -14.0 | 58 | -29.1 | 88 | -44.3 | |||||
| 29 | -14.5 | 59 | -29.6 | 89 | -44.8 |