Commands Store Config to E2 POR Defaults Cmd (01h) and Write E2 POR Defaults Cmd (03h) write 147 data bytes to flash. 147 data bytes would be spread over 3 flash blocks. SCL can hold the master for upto 600ms (200ms * 3). Hence, do kindly allow 600ms. If there is any error, the port expander will NACK. Do kindly let me know if the port expander NACKs after 600ms.
Now it is working fine with 600ms timeout