CD1400_COR3
cd_write_reg(cy, CD1400_COR3, RX_FIFO_THRESHOLD);
CD1400_WRITE_REG(cd, CD1400_COR3, MTTY_RX_FIFO_THRESHOLD);
CD1400_WRITE_REG(cd, CD1400_COR3, MBPP_RX_FIFO_THRESHOLD);