Hi wang Hao, I have the same problem. I try to communicate in SPI mode with m'y SPI driver.
I have the CLEV6630B V2.0 board and try to communicate with another CPU than the one on the eval board.
I suppose you try to do the same thing.
Be sure to set the pin IFSEL0 and 1 in the state that match the way you want to communicate (SPI, I2C, UART)
drive the reset pin (CLRC_NRST) before starting to communicate with it.
IN SPI MODE
I discover today that between some write you need to keep the chip select (SSEL) low. The picture below is the first frame of the communication with the microcontroler on the CLEV6630board and the CLRC663 chip.
In green it's the SPI clock
In yellow it's the NSS pin (chip select of SPI) (SSEL as written on the CLEV6630B board)
Hope this help!
Tell more about your setup. (how you try to communicate SPI, I2C ...)