The trusted platform module (TPM) includes a TPM logic circuit, a receive buffer, a TPM register, and one or more processors. The TPM register is a storage space obtained by dividing a memory of the TPM. The TPM logic circuit receives a TPM register write command from a host and stores a payload of the write command into the receive buffer. The payload of the TPM register write command is a part or all of content forming TPM command data. When data in the receive buffer reaches a first data amount threshold, the processor dumps the data in the receive buffer into the TPM register. When all the content of the TPM command data is stored in the TPM register, the one or more processors execute the TPM command data.