A control method for a data reception chip comprising a voltage generation module comprising a plurality of resistors (R 1 ∼R N) and a selection unit, wherein the resistors (R 1 ∼R N) are connected in series with one another and divide an operation voltage to generate a plurality of divided voltages (V 1 ∼V N), and the selection unit selects one of the divided voltages (V 1 ∼V N) as a reference voltage according to a control, signal (Sc), wherein the control method further comprises: controlling the selection unit to select a first divided voltage (V 1) of the divided voltages (V 1 ∼V N); receiving data; utilizing a comparator (CMAO) to compare the data with the first divided voltage (V 1) to generate a first compared result; determining whether the first compared result is equal to pre-determined data; directing the selection unit to select a second divided voltage (V 2) of the divided voltages (V 1 ∼V N) when the first compared result is not equal to the pre-determined data; utilizing the comparator (CMAO) to compare the data with the second divided voltage (V 2) to generate a second compared result; determining whether the second compared result is equal to pre-determined data; and directing the selection unit to select a third divided voltage (V 3) of the divided voltages (V 1 ∼V N) when the second compared result is not equal to the pre-determined data, wherein the first, second and third divided voltages (V 1, V 2, V 3) are different, wherein the operation voltage is coupled to the data and the voltage generation module. a plurality of resistors (R 1 ∼R N) and a selection unit, wherein the resistors (R 1 ∼R N) are connected in series with one another and divide an operation voltage to generate a plurality of divided voltages (V 1 ∼V N), and the selection unit selects one of the divided voltages (V 1 ∼V N) as a reference voltage according to a control, signal (Sc), wherein the control method further comprises: controlling the selection unit to select a first divided voltage (V 1) of the divided voltages (V 1 ∼V N); receiving data; utilizing a comparator (CMAO) to compare the data with the first divided voltage (V 1) to generate a first compared result; determining whether the first compared result is equal to pre-determined data; directing the selection unit to select a second divided voltage (V 2) of the divided voltages (V 1 ∼V N) when the first compared result is not equal to the pre-determined data; utilizing the comparator (CMAO) to compare the data with the second divided voltage (V 2) to generate a second compared result; determining whether the second compared result is equal to pre-determined data; and directing the selection unit to select a third divided voltage (V 3) of the divided voltages (V 1 ∼V N) when the second compared result is not equal to the pre-determined data, wherein the first, second and third divided voltages (V 1, V 2, V 3) are different, wherein the operation voltage is coupled to the data and the voltage generation module. controlling the selection unit to select a first divided voltage (V 1) of the divided voltages (V 1 ∼V N); receiving data; utilizing a comparator (CMAO) to compare the data with the first divided voltage (V 1) to generate a first compared result; determining whether the first compared result is equal to pre-determined data; directing the selection unit to select a second divided voltage (V 2) of the divided voltages (V 1 ∼V N) when the first compared result is not equal to the pre-determined data; utilizing the comparator (CMAO) to compare the data with the second divided voltage (V 2) to generate a second compared result; determining whether the second compared result is equal to pre-determined data; and directing the selection unit to select a third divided voltage (V 3) of the divided voltages (V 1 ∼V N) when the second compared result is not equal to the pre-determined data, wherein the first, second and third divided voltages (V 1, V 2, V 3) are different, wherein the operation voltage is coupled to the data and the voltage generation module.