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TLV320AIC3204: Headphone pop sound

long zhou
Prodigy 10 points
Part Number: TLV320AIC3204

Hi Sir,

Plug in headphones, play music or other sounds, there is a pop sound at the beginning, have you encountered a similar situation before?

  • 0
    TI__Guru* 95145 points

    Hi Long,

    Can you please share the configuration you're using and the sequence you're following?
    Are you using the EVM or a custom board?

    Do you have the recommended de-pop resistor populated at the output?

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    Prodigy 50 points

    Hi Lvan,

    1. As attached files, new_hp.txt file is insert headset without playing music, new_hp_music.txt file is insert headset with playing music.

    new_hp.txt 
    00: 01
01: 00
02: 60
03: 00
04: 00
05: 11
06: 04
07: 00
08: 00
09: 00
0a: 00
0b: 01
0c: 01
0d: 00
0e: 80
0f: 02
10: 00
11: 08
12: 01
13: 01
14: 80
15: 01
16: 00
17: 04
18: 00
19: 00
1a: 01
1b: 00
1c: 00
1d: 00
1e: 01
1f: 00
20: 00
21: 00
22: 00
23: 00
24: 44
25: 00
26: 00
27: 00
28: 00
29: 00
2a: 00
2b: 00
2c: 10
2d: 00
2e: 10
2f: 00
30: 00
31: 00
32: 00
33: 00
34: 00
35: 12
36: 03
37: 02
38: 03
39: 00
3a: 00
3b: 00
3c: 01
3d: 01
3e: 00
3f: 14
40: 0c
41: 00
42: 00
43: f2
44: 6f
45: 38
46: 00
47: 00
48: 00
49: 00
4a: 00
4b: ee
4c: 10
4d: d8
4e: 7e
4f: e3
50: 00
51: 00
52: 88
53: 00
54: 00
55: 00
56: 00
57: 00
58: 7f
59: 00
5a: 00
5b: 00
5c: 00
5d: 00
5e: 00
5f: 00
60: 7f
61: 00
62: 00
63: 00
64: 00
65: 00
66: 00
67: 00
68: 00
69: 00
6a: 00
6b: 00
6c: 00
6d: 00
6e: 00
6f: 00
70: 00
71: 00
72: 00
73: 00
74: 00
75: 00
76: 00
77: 00
78: 00
79: 00
7a: 00
7b: 00
7c: 00
7d: 00
7e: 00
7f: 00
80: 00
81: 00
82: 00
83: 00
84: 00
85: 00
86: 00
87: 00
88: 00
89: 00
8a: 00
8b: 10
8c: 00
8d: 00
8e: 00
8f: 00
90: 40
91: 40
92: 40
93: 40
94: 00
95: 00
96: 00
97: 00
98: 00
99: 00
9a: 00
9b: 00
9c: 00
9d: 00
9e: 00
9f: 00
a0: 00
a1: 00
a2: 00
a3: 00
a4: 00
a5: 00
a6: 00
a7: 00
a8: 00
a9: 00
aa: 00
ab: 00
ac: 00
ad: 00
ae: 00
af: 00
b0: 00
b1: 00
b2: 00
b3: 00
b4: 00
b5: 00
b6: 40
b7: 00
b8: 00
b9: 40
ba: 00
bb: 80
bc: 80
    new_hp_music.txt 
    00: 00
01: 00
02: 60
03: 00
04: 03
05: 91
06: 08
07: 00
08: 00
09: 00
0a: 00
0b: 82
0c: 88
0d: 00
0e: 80
0f: 02
10: 00
11: 08
12: 82
13: 88
14: 80
15: 01
16: 00
17: 04
18: 00
19: 00
1a: 01
1b: 00
1c: 00
1d: 01
1e: 84
1f: 00
20: 00
21: 00
22: 00
23: 00
24: 88
25: ee
26: 11
27: 00
28: 00
29: 00
2a: 00
2b: 00
2c: c0
2d: 00
2e: 10
2f: 00
30: 00
31: 00
32: 00
33: 00
34: 00
35: 12
36: 03
37: 02
38: 03
39: 00
3a: 00
3b: 00
3c: 01
3d: 01
3e: 00
3f: d4
40: 00
41: 00
42: 00
43: f2
44: 6f
45: 38
46: 00
47: 00
48: 00
49: 00
4a: 00
4b: ee
4c: 10
4d: d8
4e: 7e
4f: e3
50: 00
51: 00
52: 88
53: 00
54: 00
55: 00
56: 00
57: 00
58: 7f
59: 00
5a: 00
5b: 00
5c: 00
5d: 00
5e: 00
5f: 00
60: 7f
61: 00
62: 00
63: 00
64: 00
65: 00
66: 00
67: 00
68: 00
69: 00
6a: 00
6b: 00
6c: 00
6d: 00
6e: 00
6f: 00
70: 00
71: 00
72: 00
73: 00
74: 00
75: 00
76: 00
77: 00
78: 00
79: 00
7a: 00
7b: 00
7c: 00
7d: 00
7e: 00
7f: 00
80: 00
81: 00
82: 00
83: 00
84: 00
85: 00
86: 00
87: 00
88: 00
89: 3c
8a: 00
8b: 10
8c: 08
8d: 08
8e: 08
8f: 08
90: 00
91: 00
92: 00
93: 00
94: 00
95: 00
96: 00
97: 00
98: 00
99: 00
9a: 00
9b: 00
9c: 00
9d: 00
9e: 00
9f: 00
a0: 00
a1: 00
a2: 00
a3: 00
a4: 00
a5: 00
a6: 00
a7: 00
a8: 00
a9: 00
aa: 00
ab: 00
ac: 00
ad: 00
ae: 00
af: 00
b0: 00
b1: 00
b2: 00
b3: 00
b4: 00
b5: 00
b6: 40
b7: 00
b8: 00
b9: 40
ba: 00
bb: 80
bc: 80

    2. The figure below is the schematic diagram of our hardware design，

  • 0 in reply to ju sheng
    TI__Guru* 95145 points

    Hi Ju,

    I'm taking a look at your setup and configuration and will be back with further comments by tomorrow before the end of the day.

    Best regards,
    -Ivan Salazar
    Applications Engineer

  • 0 in reply to Ivan Salazar
    Prodigy 50 points

    Hi Lvan,

    ok, hope to get your reply soon, thank you

  • 0 in reply to Ivan Salazar
    Prodigy 50 points

    Hi Lvan,

    By adding log to the code, it is found that when the audio is turned on, the following registers will be written，

    06-24 03:32:51.965 0 0 I : i2c_write--- 0x4 <=== 0x3
    06-24 03:32:51.966 0 0 I : i2c_write--- 0x1d <=== 0x1
    06-24 03:32:51.967 0 0 I : i2c_write--- 0x5 <=== 0x11
    06-24 03:32:51.967 0 0 I : i2c_write--- 0x6 <=== 0x8
    06-24 03:32:51.968 0 0 I : i2c_write--- 0x7 <=== 0x0
    06-24 03:32:51.968 0 0 I : i2c_write--- 0x8 <=== 0x0
    06-24 03:32:51.969 0 0 I : i2c_write--- 0xb <=== 0x2
    06-24 03:32:51.970 0 0 I : i2c_write--- 0xc <=== 0x8
    06-24 03:32:51.971 0 0 I : i2c_write--- 0xd <=== 0x0
    06-24 03:32:51.971 0 0 I : i2c_write--- 0xe <=== 0x80
    06-24 03:32:51.972 0 0 I : i2c_write--- 0x12 <=== 0x2
    06-24 03:32:51.973 0 0 I : i2c_write--- 0x13 <=== 0x8
    06-24 03:32:51.973 0 0 I : i2c_write--- 0x14 <=== 0x80
    06-24 03:32:51.974 0 0 I : i2c_write--- 0x1e <=== 0x4
    06-24 03:32:51.974 0 0 I : i2c_write--- 0x1b <=== 0x0
    06-24 03:32:51.995 0 0 I : i2c_write--- 0x40 <=== 0x0

    Turn off audio：

    06-24 03:33:01.508 0 0 I : i2c_write--- 0x40 <=== 0xc

  • 0 in reply to ju sheng
    TI__Guru* 95145 points

    Hi Ju,

    A couple comments below:

    • Device recommendation is to use a resistor connection to GND after the output coupling capacitors, currently it seems to be using RC network instead. Have you tried to replace RC for resistor around 6k-Ohm as mentioned in the documentation.
    • Is the device losing clocks when no audio is playing? Perhaps you don't need all those commands when playing, but only the last one controlling the DAC.
    • Additionally, perhaps you can try using HPx slow power up ramp instead of DAC mute/unmute.

    Best regards,
    -Ivan Salazar
    Applications Engineer