Integrate intellectual properties (IP's) designed for different protocols is always a troublesome task for system integrators. In this paper, we explore efficient methods to generate protocol converters automatically under the consideration of system performance. For the frequency/phase mismatch, we proposed a modified asynchronous FIFO together with our protocol converter. The generated results are verified in Synopsis Verification IP (VIP) environment. The performance and cost of the resulted converter are as efficient as the manual one, ARM Prime Cell.