TWI of nRF51822 is having internal twi engine or not?

[rangineni balu]

hi guys, i am writing a code for reading data from a sensor using twi interface, the twi is not working properly, here in SDK i found two examples of twi - sw_ nd hw_ is sw_ one is bit-banging one? or what?

is the nrf51822 has internal twi engine or not i didn't found out any in the data sheet, help me to resolve these...

[Ole Morten]

Yes, as stated in the PS section 4.9, the nRF51822 has a hardware TWI master.

The bit-bang implementation is included due to historical reasons, in case it might be useful for someone. It was originally made for a very early chip-revision (early engineering sample), that did not include the HW block.