PAD_CTRL
cx_read(PAD_CTRL));
reg = cx_read(PAD_CTRL);
cx_write(PAD_CTRL, reg);
reg = cx_read(PAD_CTRL);
cx_write(PAD_CTRL, reg);
reg = cx_read(PAD_CTRL);
cx_write(PAD_CTRL, reg);
reg = cx_read(PAD_CTRL);
cx_write(PAD_CTRL, reg);
cx_write(PAD_CTRL, 0x00500300);
cx_write(PAD_CTRL, 0x12); /* for I2C */