Dear TI member,
Nice to meet you. We use TI product TI/ISO1541DR and meet one issue.
Please refer below block diagram and information. Could you help us for this issue?
1.Set I2C_CLK to 100K Hz:The I2C address of AC power monitor IC can be recognized and the AC power monitor IC work normal.
2. Set I2C_CLK to 400K Hz(MCU):The I2C address of AC power monitor IC can be recognized but the AC power monitor IC can’t work.
I2C_CLK be set to 400K Hz(MCU):
(1)I2C_DATA can communication of TI/ISO1541DR so I2C address of AC power monitor IC can be recognized. (2)I2C_CLK can be transfer from SCL1 to SCL2 of TI/ISO1541DR so AC power monitor IC can’t work.
3.We did below check:
(1)MCU I2C can set to fast mode:400K Hz
(2)AC Power Monitor IC Interface:I2C and It can support 100K Hz and 400K Hz.
(3) The max operating frequency of TI/ISO1541DR can be 1M Hz
Block diagram:
Thank you.