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Title: Core-3399pr0-jd4 v1.3 i2c1 question [Print This Page]

Author: AndrewMaltsev Time: 10/10/2022 13:55
Title: Core-3399pr0-jd4 v1.3 i2c1 question
Hello.
I can't find the schematics on Core-3399Pro-JD4 v1.3.
I have only schematics on MB-JD4-RK3399_3399PRO v1.1.
My question is about i2c1. I see two TCS4525 and one TCS4526 on Core-3399Pro-JD4.
One TCS4525 and one TCS4526 is connected to i2c0. I see that in device tree file rk3399pro-firefly-aiojd4.dts and using i2cdetect utility. i2c address is 0x1c for TCS4525 and 0x10 for TCS4526. I can not find second TCS4525 in device tree file.
I looking for analogous board based on rk3399pro and saw that board have also two TCS4525 and one TCS4526. Second TCS4525 is connected to i2c1. With i2cdetect utility I see device with 0x1c address on i2c1, but schematics on MB-JD4-RK3399_3399PRO have ALC5640 codec on i2c1 and also with address 0x1c.

Author: 895816513 Time: 10/12/2022 09:29
There are two TCS4525, but one is not actually used. Just refer to the dts.

Author: AndrewMaltsev Time: 10/12/2022 16:36

895816513 Posted at 10/12/2022 09:29
There are two TCS4525, but one is not actually used. Just refer to the dts.

I looked at the schematics on tb-rk3399prod_33101_201812172.pdf (from https://www.mouser.com/pdfDocs/tb-rk3399prod_33101_201812172.pdf).
The second TCS4525 chip provides NPU_VDD_S0 (sheet 22).
Do you have the schematics for Core-3399Pro-JD4?
If it's okey then send me please an email to andymaltsev@mail.ru or provide a link.

Thanks for the answer.

Author: AndrewMaltsev Time: 10/13/2022 20:37
I tried to remove resistor R102 from the mb board near pin 39 of ALC5640 (page 9 mb-jd4-rk3399_3399pro-v11-20190.pdf) and the device with address 0x1c on i2c1 disappeared. So it's a codec chip ALC5640. The question about the second TCS4525 on Core-3399Pro-JD4 remained.

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