2020-08-04 10:55 AM
Hi,
I am using the LSM6DS3 with I2C at 400 kHZ. I would like to know the pin capacitance value so as to calculate the value of the required pull up resistors. I was unable to find this in the data sheet.
Thanks
Solved! Go to Solution.
2020-08-05 10:01 AM
2020-08-05 08:23 AM
You are probably talking about the capacitance of the I2C pins, right?
Well, that usually doesn't matter with the LSM6DS3, as the capacitance of the traces/wires are a bigger contributor to the signal quality when running at 400kHz.
Have you also checked the appnote AN4650, which also gives you some recommendations?
Good luck!
/Peter
2020-08-05 09:03 AM
Hi Peter,
I took a look at the Appnote for which you have provided the link. The recommendation given is for the SDx and SCx pins when using it in Mode 2. But I'm trying to find a pull up resistance value to use with the SDA and SCL pins. I had tried the LSM6DS3 with a microcontroller and I was getting zeroes on the I2C lines till I added 4.7k pull up resistors. The 4.7k was something I had in hand and just tried it. I need a more concrete/calculated value as this would be used on a custom board.
Thanks
2020-08-05 10:01 AM