case 0:ReadOldH&=(~(0x01<<(7-Tier_bit)));break;
case 1:ReadOldH|=(0x01<<(7-Tier_bit));break;
case 2:ReadOldH^=(0x01<<(7-Tier_bit));break;
default:break;
case 0:ReadOldL&=(~(0x01<<(15-Tier_bit)));break;
case 1:ReadOldL|=(0x01<<(15-Tier_bit));break;
case 2:ReadOldL^=(0x01<<(15-Tier_bit));break;
default:break;