is twi is compatible with SMBUS or not?

[rangineni balu]

hi,

i am using a light sensor which is SMBUS serial interface, i tried to interface twi of nrf51822 with the sensor, but i am not able to get acknowledgement from the sensor, i want to know whether the twi of nrf51822 is compatible with SMBUS or not?  i tried both the s/w and h/w twi of nrf51822

[Asbjørn]

It looks like if you have a too high clock speed, the SMBUS would not be able to keep up. Could it be that you have configured the communication with a too high clock?