Go to advanced search

by hardy8
Wed Sep 25, 2019 4:26 pm
Forum: Troubleshooting
Topic: Troubleshoot PMIC
Replies: 16
Views: 3186

Re: Troubleshoot PMIC

hippy, I am using arduino pro mini 3.3v 8Mhz for i2c communication using Arduino wire library. I have added pull up of 1k to 3.3v. Unable to get any data from new and old ICs. Arduino to arduino i2c communication works fine. Is there any special code required for Nack/Ack i2c communication ? I am us...
by hardy8
Sun Sep 22, 2019 5:24 pm
Forum: Troubleshooting
Topic: Troubleshoot PMIC
Replies: 16
Views: 3186

Re: Troubleshoot PMIC

I bought a new PMIC mxl7704 r3 from aliexpress. After mounting it to a breakout board , I tried arduino to read register value of chip. But I got no output from PMIC's i2c bus. Slave address 0x2d is written in PMIC datasheet. Can anyone suggest how to read and write data to chip.
by hardy8
Sun Apr 07, 2019 6:57 am
Forum: Troubleshooting
Topic: Troubleshoot PMIC
Replies: 16
Views: 3186

Re: Troubleshoot PMIC

It would be great help if anyone could share that PMIC registers' values for a new pi 3b+. I think replacing PMIC with these values could give a new life to my pi :idea:
by hardy8
Wed Apr 03, 2019 11:56 am
Forum: Troubleshooting
Topic: Troubleshoot PMIC
Replies: 16
Views: 3186

Re: Troubleshoot PMIC

mahjongg wrote:
Wed Apr 03, 2019 8:52 am
hardy8 wrote:
Wed Apr 03, 2019 8:49 am
As this is an open source hardware. The configuration of this IC should be shared by Raspberry.org too.
I don't know where you got that notion from, but the RPI is NOT open source hardware!!!!
That is real bug. :shock:
by hardy8
Wed Apr 03, 2019 8:49 am
Forum: Troubleshooting
Topic: Troubleshoot PMIC
Replies: 16
Views: 3186

Re: Troubleshoot PMIC

I have got the same problem, shorted 5v to Gnd. Now no voltage on 3v3 pin on pi 3 b+ . My PMIC is blown and before replacing the PMIC, I want to know the configuration of all the register in MxL7704 IC used in a brand new pi 3 b+. I think new PMIC registers should be configured same as in registers ...

Go to advanced search