Hi,
We are using LP8866QDCPRQ1 part number in our Application. The I2C driven for this LED driver from MCU. and it is a shared bus. can you please provide the pin capacitance of the I2C line to compute the right pull up resistor value
Thanks
This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Hi,
We are using LP8866QDCPRQ1 part number in our Application. The I2C driven for this LED driver from MCU. and it is a shared bus. can you please provide the pin capacitance of the I2C line to compute the right pull up resistor value
Thanks
Hi Rajvel,
Our expert is out of office and will reply to you later.
BR, Jared
Hi Rajvel
could you pls kindly check with the I2Ctime requirement in EC table?We introduce the detailed time requirement there.
HI Zhiqian Wu,
I have checked the I2C requirement table. yes timing specification are provided. But The Pin capacitance of I2C pins are not provided in the datasheet. The reason I am asking to size the correct pull up resistor as this I2C Bus is shared with other peripheral also. so based on the Ti application note SLVA689–February 2015, I am trying to find the Bus capacitance.
Thanks
Hi, Rajvel
Pls refer to our EVM board, it has the detailed resistor value.
Hi Zhiqian, EVM Board uses 2.26K. Please note that Micro controller driving this LED Driver through shared I2C Bus. there are other device also connected on this Bus. if I use the suggested value from EVM (2.26K), I am not sure whether it meets the requirement or not. so we need Pin capacitance of this chip on the I2C line to calculate correct pull up value.
Thanks
Rajvel M