Abstract: The present disclosure relates to embodiments of bus interface systems capable of dealing with the tougher half clock cycle of SREAD commands in the new mobile industry processor interface (MIPI) radio frequency front end (RFFE) version 2.0 standard. With regard to the slave bus controllers of the bus interface systems disclosed herein, the slave bus controller is configured to operate the slave bus driver such that the data bus line is driven towards a minimum voltage level in response to a final clock edge of the clock signal during the bus park subframe. To ensure compliance with the MIPI RFFE version 2.0 standard, the slave bus controller is configured to detect when the data bus line has been driven within a first voltage range after the final clock edge and continue driving the data bus line 16 even after the bus park half clock period is finished.