https://e2e.ti.com/support/audio-group/audio/f/audio-forum/625996/tlv320dac3100-tlv320dac3100
部件号：TLV320DAC3100大家好：
我们使用TLV320DAC3100作为声音编解码器和PA：扬声器输出(单声道，4R，1W)和线路输出(立体声，16R)，下面是电路原理图：
问题：
有时，当设备(操作系统：Android 4.4。2)通电并首次播放声音时，扬声器没有声音输出。 然后，如果您进行一些控制(Vol+，Vol-....)，扬声器将正常输出声音。 线路输出始终正常输出
详细信息：
在此之前还有另一个问题：有时，某些设备的扬声器一直没有任何声音输出，除了设备的重置电源，我们发现当发生此问题时，注册页0，注册37=0xAA，它应该是0xBA， 因此我们采取对策： 播放声音前检测此寄存器， 如果0x37=0xAA，软件将再次写入0x37=0xBA。
使用此对策时，出现了上述问题，因为在第一次播放声音之前，0x37的值为0xBA，而0x37的值是正确的，因此软件不会再次写入， 然后I2S启动工作，0x37的值将突然变为0xAA，导致D类电源关闭并打开声音输出。
我们不知道是什么会导致寄存器值被更改，因为我们不做任何事情......
下面是注册地图，请帮我们检查，非常感谢！
注册：
[4][ 26.29.1855万 ]地址0x00：write：0x00，read：0x00
[4][ 26.29.2973万 ]地址0x01：write：0x01，read：0x00
[4][ 26.29.4078万 ]地址0x04：write:0x07，read:0x07
[4][ 26.29.5192万 ]地址0x06：write:0x07，read:0x07
[4][ 26.29.6389万 ]地址0x07：write：0x00，read：0x00
[4][ 26.29.7054万 ]地址0x08：write:0x00，read:0x00
[4][ 26.29.8137万 ]地址0x05：write:0x94，read:0x94
[4][ 26.29.9296万 ]地址0x0B：write：0x82，read：0x82
[4][ 26.30.044万 ]地址0x0c：write：0x87，read：0x87
[4][ 26.30.162万 ]地址0x0d：write：0x00，read：0x00
[4][ 26.30.2285万 ]地址0x0E：write：0x80，read：0x80
[4][ 26.30.3406万 ]地址0x1b：write：0x00，read：0x00
[4][ 26.30.452万 ] addr 0x3c：write:0x02，read:0x02
[4][ 26.30.564万 ]地址0x00：write：0x00，read：0x00
[4][ 26.30.6793万 ]地址0x74：write：0x00，read：0x00
[4][ 26.30.792万 ]地址0x00：write：0x01，read：0x01
[4][ 26.30.9037万 ]地址0x1f：write:0x14，read:0x14
[4][ 26.31.0178万 ]地址0x21：write：0x4e，read：0x4e
[4][ 26.31.1299万 ]地址0x23：write:0x44，read:0x44
[4][ 26.31.2516万 ]地址0x28：write：0x0E，read：0x0E
[4][ 26.31.3206万 ]地址0x29：write：0x0E，read：0x0E
[4][ 26.31.4316万 ]地址0x2a：write：0x0c，read：0x0c
[4][ 26.31.5455万 ]地址0x1f：write：0xd6，read：0xd6
[4][ 26.31.684万 ]地址0x20：write:0x86，read:0x86
[4][ 26.31.7949万 ]地址0x24：write:0x80，read:0x80
[4][ 26.31.9053万 ]地址0x25：write:0x80，read:0x80
[4][ 26.32.0192万 ]地址0x26：write：0x8e，read：0x8e
<4>[ 26.32.0205万 (睡眠)]睡眠50毫秒
[4][ 26.36.1222万 ]地址0x00：write：0x00，read：0x00
[4][ 26.36.2364万 ]地址0x3f：write:0xFC，read:0xFC
[4>[ 26.36.3595万 Read] addr 0x41：write:0x0a，read:0x0a
[4][ 26.36.4379万 ]地址0x42：write：0x0a，read：0x0a
[4][ 26.36.6059万 ]地址0x40：write：0x0E，read：0x0E
[4][ 26.36.7206万 ]地址0x00：write：0x01，read：0x01
[4][ 26.37.0554万 ]地址0x23：write:0x44，read:0x44
[4][ 26.37.1978万 ]地址0x00：write：0x00，read：0x00
[4][ 26.37.3168万 ]地址0x40：write：0x0E，read：0x0E
[4][ 26.37.4311万 ]地址0x00：write：0x01，read：0x01
[4][ 26.37.554万 ]地址0x28：write:0x02，read:0x02
[4][ 26.37.6405万 ]地址0x29：write:0x02，read:0x02
[4][ 26.37.7581万 ]地址0x2a：write:0x08，read:0x08
[4][ 26.37.8746万 ]地址0x20：write:0x06，read:0x06
[4][ 26.37.9874万 ]地址0x00：write：0x00，read：0x00
[4][ 26.38.1067万 ]地址0x44：write:0x61，read:0x61
[4][ 26.38.2361万 ]地址0x45：write:0x20，read:0x20
[4][ 26.38.4368万 ]地址0x46：write：0x6b，read：0x6b
[4][ 26.38.5563万 ]地址0x00：write:0x08，read:0x08
[4][ 26.38.6725万 ]地址0x01：write：0x05，read：0x05
[4][ 26.38.8088万 ]地址0x01：write：0x05，read：0x05
[4][ 26.39.0239万 ]地址0x02：write:0x7f，read:0x7f
[4][ 26.39.1027万 ]地址0x03：write:0x2d，read:0x2d
[4][ 26.39.179万 ]地址0x04：write：0x82，read：0x82
[4][ 26.39.2554万 ]地址0x05：write:0x39，read:0x39
[4][ 26.39.3296万 ]地址0x06：write：0x7c，read：0x7c
[4][ 26.39.4034万 ]地址0x07：write:0x69，read:0x69
[4][ 26.39.4779万 ]地址0x08：write：0x7d，read：0x7d
[4][ 26.39.5522万 ]地址0x09：write：0xc4，read：0xc4
[4][ 26.39.6282万 ]地址0x0a：write：0x84，read：0x84
[4][ 26.39.7029万 ]地址0x0B：write：0x63，read：0x63
[4][ 26.39.9226万 ]地址0x0c：write：0x6f，read：0x6f
[4][ 26.39.9987万 ]地址0x0d：write：0xee，read：0xee
[4][ 26.40.0841万 ]地址0x0E：write：0xa3，read：0xa3
[4][ 26.40.1618万 ]地址0x0F：write:0x70，read:0x70
4>[ 26.40.2345万 地址0x10：write：0x5e，read：0x5e
[4][ 26.40.3084万 ]地址0x11：write:0x42，read:0x42
[4][ 26.40.3814万 ]地址0x12：write：0x5c，read：0x5c
[4][ 26.40.452万 ]地址0x13：write:0x90，read:0x90
4>[ 26.40.522万 地址0x14：write：0xb1，read：0xb1
[4][ 26.40.5964万 ]地址0x15：write:0xce，read:0xce
[4][ 26.40.7965万 ]地址0x16：write:0x77，read:0x77
[4][ 26.40.8678万 ]地址0x17：write:0x3f，read:0x3f
[4][ 26.40.9379万 ]地址0x18：write：0xc1，read：0xc1
[4][ 26.41.0117万 ]地址0x19：write:0x54，read:0x54
[4][ 26.41.0832万 ]地址0x1a：write:0x59，read:0x59
[4][ 26.41.1538万 ]地址0x1b：write：0x53，read：0x53
[4][ 26.41.2259万 ] addr 0x1c：write:0x3e，read:0x3e
[4][ 26.41.2953万 ]地址0x1d：write:0xac，read:0xac
[4][ 26.41.3654万 ] addr 0x1E：write:0xaf，read:0xaf
[4][ 26.41.4357万 ]地址0x1f：write：0x6d，read：0x6d
[4][ 26.41.6429万 ]地址0x20：write:0x71，read:0x71
[4][ 26.41.7152万 ]地址0x21：write:0x05，read:0x05
[4][ 26.41.7846万 ]地址0x22：write：0x0F，read：0x0F
4>[ 26.41.854万 地址0x23：write：0xb1，read：0xb1
[4][ 26.41.9227万 ]地址0x24：write:0x3D，read:0x3D
[4][ 26.41.9933万 ]地址0x25：write:0xce，read:0xce
[4][ 26.42.0727万 ]地址0x26：write：0x00，read：0x00
[4][ 26.42.1469万 ]地址0x27：write:0x4f，read:0x4f
[4][ 26.42.2212万 ]地址0x28：write：0xD1，read：0xD1
[4][ 26.42.2959万 ]地址0x29：write：0x2C，read：0x2C
[4][ 26.42.5102万 ]地址0x2a：write：0x7f，read：0x7f
4>[ 26.42.5874万 地址0x2b：write:0xb6，read:0xb6
[4][ 26.42.6726万 ]地址0x2C：write：0x80，read：0x80
[4][ 26.42.7741万 ] addr 0x2d：write:0xae，read:0xae
[4][ 26.42.8666万 ]地址0x2e：write：0x7E，read：0x7E
[4][ 26.42.9444万 ]地址0x2F：write:0xFC，read:0xFC
[4][ 26.43.0225万 ]地址0x30：write:0x7f，read:0x7f
[4][ 26.43.0999万 ]地址0x31：write:0x52，read:0x52
[4][ 26.43.1813万 ]地址0x32：write:0x81，read:0x81
[4][ 26.43.27万 ]地址0x33：write:0x4c，read:0x4c
[4][ 26.43.3921万 ]地址0x01：write：0x05，read：0x05
[4][ 26.43.6966万 ]地址0x02：write:0x7f，read:0x7f
[4][ 26.44.022万 ]地址0x03：write:0x2d，read:0x2d
[4][ 26.44.0985万 ]地址0x04：write：0x82，read：0x82
[4][ 26.44.1723万 ]地址0x05：write:0x39，read:0x39
[4][ 26.44.2464万 ]地址0x06：write：0x7c，read：0x7c
[4][ 26.44.3203万 ]地址0x07：write:0x69，read:0x69
[4][ 26.44.3945万 ]地址0x08：write：0x7d，read：0x7d
[4][ 26.44.4701万 ]地址0x09：write：0xc4，read：0xc4
[4][ 26.44.5433万 ]地址0x0a：write：0x84，read：0x84
[4][ 26.44.6168万 ]地址0x0B：write：0x63，read：0x63
[4][ 26.44.8202万 ]地址0x0c：write：0x6f，read：0x6f
[4][ 26.44.8997万 ]地址0x0d：write：0xee，read：0xee
[4][ 26.44.9766万 ]地址0x0E：write：0xa3，read：0xa3
[4][ 26.45.0503万 ]地址0x0F：write:0x70，read:0x70
4>[ 26.45.1233万 地址0x10：write：0x5e，read：0x5e
[4][ 26.45.1957万 ]地址0x11：write:0x42，read:0x42
[4][ 26.45.2675万 ]地址0x12：write：0x5c，read：0x5c
[4][ 26.45.3383万 ]地址0x13：write:0x90，read:0x90
4>[ 26.45.4096万 地址0x14：write：0xb1，read：0xb1
[4][ 26.45.4823万 ]地址0x15：write:0xce，read:0xce
[4][ 26.45.7339万 ]地址0x16：write:0x77，read:0x77
[4][ 26.45.809万 ]地址0x17：write:0x3f，read:0x3f
[4][ 26.45.8862万 ]地址0x18：write：0xc1，read：0xc1
[4][ 26.45.9592万 ]地址0x19：write:0x54，read:0x54
[4][ 26.46.0455万 ]地址0x1a：write:0x59，read:0x59
[4][ 26.46.1239万 ]地址0x1b：write：0x53，read：0x53
[4][ 26.46.2039万 ] addr 0x1c：write:0x3e，read:0x3e
[4][ 26.46.2819万 ]地址0x1d：write:0xac，read:0xac
[4][ 26.46.3563万 ] addr 0x1E：write:0xaf，read:0xaf
[4][ 26.46.4295万 ]地址0x1f：write：0x6d，read：0x6d
[4][ 26.46.639万 ]地址0x20：write:0x71，read:0x71
[4][ 26.46.7142万 ]地址0x21：write:0x05，read:0x05
[4][ 26.46.7876万 ]地址0x22：write：0x0F，read：0x0F
4>[ 26.46.8622万 地址0x23：write：0xb1，read：0xb1
[4][ 26.46.9364万 ]地址0x24：write:0x3D，read:0x3D
[4][ 26.47.0685万 ]地址0x25：write:0xce，read:0xce
[4][ 26.47.2152万 ]地址0x26：write：0x00，read：0x00
[4][ 26.47.2904万 ]地址0x27：write:0x4f，read:0x4f
[4][ 26.47.3669万 ]地址0x28：write：0xD1，read：0xD1
[4][ 26.47.4433万 ]地址0x29：write：0x2C，read：0x2C
[4][ 26.47.6509万 ]地址0x2a：write：0x7f，read：0x7f
4>[ 26.47.7253万 地址0x2b：write:0xb6，read:0xb6
[4][ 26.47.8022万 ]地址0x2C：write：0x80，read：0x80
[4][ 26.47.8906万 ] addr 0x2d：write:0xae，read:0xae
[4][ 26.47.9817万 ]地址0x2e：write：0x7E，read：0x7E
[4][ 26.48.0559万 ]地址0x2F：write:0xFC，read:0xFC
[4][ 26.48.1291万 ]地址0x30：write:0x7f，read:0x7f
[4][ 26.48.2058万 ]地址0x31：write:0x52，read:0x52
[4][ 26.48.2807万 ]地址0x32：write:0x81，read:0x81
[4][ 26.48.3572万 ]地址0x33：write:0x4c，read:0x4c
[4][ 26.48.5032万 ]地址0x00：write：0x00，read：0x00
[4][ 26.48.6295万 ] addr 0x3f：write:0xf4，read:0xf4
[4][ 26.48.7502万 ]地址0x40：write：0x00，read：0x00
[4][ 26.48.8923万 ]地址0x00：write：0x01，read：0x01
[4][ 26.49.031万 ]地址0x20：write:0x86，read:0x86
[4][ 26.49.1632万 ]地址0x20：write:0x86，read:0x86
[4][ 26.49.2843万 ]地址0x20：write:0x86，read:0x86
[4][ 26.49.4057万 ]地址0x2a：write：0x0c，read：0x0c
[4][ 26.49.5235万 ]地址0x2a：write：0x0c，read：0x0c
[4][ 26.49.6483万 ]地址0x2a：write：0x0c，read：0x0d
