Determination device, test system, and generation device

A generation device configured to generate an output signal including output data indicating 0's or 1's in each clock cycle of a clock signal, the device comprising:

• a first terminal configured to receive the clock signal;
• a circuit configured to generate the output data in the n-th cycle of the received clock signal based on the output data transmitted in cycles prior to the n-th cycle and based on a predetermined first generator polynomial to output the output signal including the generated output data;
• and
• a second terminal configured to output the generated output data;
• wherein the first generator polynomial is an arithmetic expression configured to:
• set the output data in the n-th cycle to an inverted value of the output data in (n-1)-th cycle when a logical sum of all the output data in a first duration corresponding to a preset number of cycles prior to the (n-1)-th cycle is 0 or a logical product of all the output data in a second duration corresponding to the preset number of cycles prior to the (n-1)-th cycle is 1, and
• set the output data in the n-th cycle to the same value as the output data in the (n-1)-th cycle when the logical sum is not 0 and the logical product is not 1.

A determination method of a determination device including a first circuit and a second circuit, the method comprising:

• receiving an input signal including input data indicating 0's or 1's in each clock cycle from outside the determination device to the first and second circuits;
• generating, in the first circuit, estimation data by estimating first input data in n-th cycle (n is an integer of 2 or more) based on second input data in cycles prior to the n-th cycle and based on a predetermined first generator polynomial;
• sending the estimation data from the first circuit to the second circuit;
• and
• determining, in the second circuit, whether the first input data in the n-th cycle in the input signal received from the outside the determination device and the received estimation data in the n-th cycle match, wherein
• the first generator polynomial is an arithmetic expression configured to:
• set the estimation data in the n-th cycle to an inverted value of the input data in (n-1)-th cycle when a logical sum of all the input data in a first duration corresponding to a preset number of cycles prior to the (n-1)-th cycle is 0 or a logical product of all the input data in a second duration corresponding to the preset number of cycles prior to the (n-1)-th cycle is 1, and
• set the estimation data in the n-th cycle to the same value as the input data in the (n-1)-th cycle when the logical sum is not 0 and the logical product is not 1.