Address receiving circuit for a semiconductor apparatus

1. An address receiving circuit for a semiconductor apparatus, comprising:

a controller that generates a control signal having an activation cycle corresponding to a prescribed time difference between an initial mode register set (MRS) command and a subsequent MRS command in response to the initial MRS command; and

an address buffer that receives an address according to the control signal.

2. The address receiving circuit of claim 1 ,

wherein the controller is configured to stop a level transiting of the control signal when the initial MRS command is activated.

3. The address receiving circuit of claim 2 ,

wherein the controller includes:

a timing signal generator that sequentially shifts the initial MRS command to generate a plurality of timing signals;

a period signal generator that performs a logical operation on the initial MRS command and the plurality of timing signals to generate a period signal; and

a control signal generator that generates the control signal using the period signal and a clock signal.

4. The address receiving circuit of claim 3 ,

wherein the timing signal generator includes a plurality of shift registers that receive and sequentially shift the initial MRS command.

5. The address receiving circuit of claim 4 ,

wherein the number of the plurality of shift registers is determined according to the standard of cycle time of the initial MRS command.

6. The address receiving circuit of claim 3 ,

wherein the period signal generator includes a logic circuit that performs a logical OR operation on the plurality of timing signals and inverts the result value of the logical OR operation.

7. The address receiving circuit of claim 3 ,

wherein the control signal generator includes a logic circuit that performs a logical AND operation on the period signal and an inverted clock signal, and inverts the result value of the logical AND operation.