DS90UB927Q-Q1: GPIO_3 didn´t work when paired with DS90UB928Q-Q1

Hello-

What is the PWM signal frequency and levels presented as an input to the 927 GPIO3 pin?

Regards,
Davor

Hello, the signal is 1KHz 50% duty cycle 3.3V, but i try on/off signal and didn´t work too.

this is the circuit connected to GPIO3

thanks

Hello-

It is still not clear from the circuit that the signal reaches the 927 GPIO3 input pin. Can you measure the amplitude of the signal on the 927 GPIO3 pin?

Regards,
Davor

GPIO 3 input pin on 927 is connected to uC PWM pin output, the signal has 3.3V amplitude 1KHz 50% duty cycle. I also try toggle from 0V to 3.3V at very low frequency and didn´t work.

thanks.

Hello, Could you please provide register dumps for these parts?
This is unexpected behavior from these parts.
We are also working to set this up in our lab.
Thanks

Hello, this is the configuration, we also had in DS90UB927q i2S_WC at 32KHz and I2S_CLK at 1MHz this two signal are present all the time.
thanks.
ALL values in HEX
DS90UB927q
0 28
1 0
2 0
3 da
4 80
5 0
6 58
7 40
8 40
9 0
a 0
b 0
c 1
d 25
e 55
f 3
10 0
11 0
12 6
13 90
14 0
15 0
16 fe
17 1e
18 a1
19 a5
1a 0
1b 0
1c 0
1d 1
1e 0
1f 0
20 3
21 0
22 25
23 0
24 0
25 0
26 0
27 0
28 0
29 24
2a 0
2b a0
2c 0
2d 0
2e a5
2f 5a
30 3
31 10
32 0
33 0
34 0
35 0
36 8
37 0
38 0
39 a
3a 20
3b 20
3c 0
3d 0
3e 0
3f 0
40 0
41 0
42 0
43 0
44 0
45 0
46 0
47 0
48 0
49 0
4a 0
4b 0
4c 0
4d 0
4e 0
4f 0
50 20
51 0
52 0
53 0
54 0
55 0
56 0
57 0
58 0
59 0
5a 0
5b 0
5c 0
5d 0
5e 0
5f 0
60 0
61 0
62 0
63 0
64 10
65 0
66 0
67 0
68 0
69 0
6a 0
6b 0
6c 0
6d 0
6e 0
6f 0
70 c8
71 30
72 0
73 0
74 0
75 0
76 0
77 c8
78 30
79 0
7a 0
7b 0
7c 0
7d 0
7e 0
7f 0
80 0
81 0
82 0
83 0
84 0
85 0
86 0
87 0
88 0
89 0
8a 0
8b 0
8c 0
8d 0
8e 0
8f 0
90 0
91 0
92 0
93 0
94 0
95 0
96 0
97 0
98 0
99 0
9a 0
9b 0
9c 0
9d 0
9e 0
9f 0
a0 0
a1 0
a2 0
a3 0
a4 0
a5 0
a6 0
a7 0
a8 0
a9 0
aa 0
ab 0
ac 0
ad 0
ae 0
af 0
b0 0
b1 0
b2 0
b3 0
b4 0
b5 0
b6 0
b7 0
b8 0
b9 0
ba 0
bb 0
bc 0
bd 0
be 0
bf 0
c0 0
c1 0
c2 80
c3 0
c4 38
c5 0
c6 0
c7 60
c8 40
c9 0
ca 0
cb 0
cc 0
cd 0
ce 0
cf 0
d0 0
d1 0
d2 0
d3 0
d4 0
d5 0
d6 0
d7 0
d8 0
d9 0
da 0
db 0
dc 0
dd 0
de 0
df 0
e0 0
e1 0
e2 80
e3 0
e4 28
e5 8
e6 0
e7 0
e8 0
e9 0
ea 0
eb 0
ec 0
ed 0
ee 0
ef 0
f0 5f
f1 55
f2 42
f3 39
f4 32
f5 37
f6 0
f7 0
f8 0
f9 0
fa 0
fb 0
fc 0
fd 0
fe 0


DS90UB928q
0 58
1 4
2 0
3 f0
4 fe
5 1e
6 0
7 28
8 0
9 0
a 0
b 0
c 0
d 0
e 0
f 0
10 0
11 0
12 0
13 0
14 0
15 0
16 0
17 0
18 0
19 1
1a 0
1b 0
1c b
1d 23
1e 33
1f 5
20 0
21 0
22 46
23 10
24 8
25 0
26 83
27 84
28 0
29 0
2a 0
2b 0
2c 0
2d 0
2e 0
2f 0
30 0
31 0
32 10
33 25
34 fa
35 0
36 0
37 0
38 0
39 0
3a 0
3b 0
3c 0
3d a0
3e 0
3f 10
40 43
41 3
42 3
43 0
44 60
45 88
46 0
47 0
48 f
49 0
4a 0
4b 8
4c 0
4d 0
4e 63
4f 0
50 3
51 10
52 0
53 1
54 80
55 0
56 8
57 0
58 0
59 3f
5a 20
5b 20
5c 0
5d 0
5e 0
5f 0
60 0
61 0
62 0
63 0
64 10
65 0
66 0
67 0
68 0
69 0
6a 0
6b 0
6c 0
6d 0
6e 4
6f 0
70 0
71 0
72 0
73 7
74 7
75 8
76 0
77 0
78 0
79 0
7a 0
7b 4d
7c 2
7d 0
7e 0
7f 0
80 0
81 0
82 0
83 0
84 0
85 0
86 0
87 0
88 0
89 0
8a 0
8b 0
8c 0
8d 0
8e 0
8f 0
90 0
91 0
92 0
93 0
94 0
95 0
96 0
97 0
98 0
99 0
9a 0
9b 0
9c 0
9d 0
9e 0
9f 0
a0 0
a1 0
a2 0
a3 0
a4 0
a5 0
a6 0
a7 0
a8 0
a9 0
aa 0
ab 0
ac 0
ad 0
ae 0
af 0
b0 0
b1 0
b2 0
b3 0
b4 0
b5 0
b6 0
b7 0
b8 0
b9 0
ba 0
bb 0
bc 0
bd 0
be 0
bf 0
c0 0
c1 0
c2 0
c3 0
c4 0
c5 0
c6 0
c7 0
c8 40
c9 0
ca 0
cb 0
cc 0
cd 0
ce 0
cf 0
d0 0
d1 0
d2 0
d3 0
d4 0
d5 0
d6 0
d7 0
d8 0
d9 0
da 0
db 0
dc 0
dd 0
de 0
df 0
e0 0
e1 0
e2 0
e3 0
e4 0
e5 0
e6 0
e7 0
e8 0
e9 0
ea 0
eb 0
ec 0
ed 0
ee 0
ef 0
f0 5f
f1 55
f2 42
f3 39
f4 32
f5 38
f6 0
f7 0
f8 0
f9 0
fa 0
fb 0
fc 0
fd 0
fe 0