Semiconductor integrated circuit device and microcomputer

A semiconductor integrated circuit device comprising:

• a high-speed serial interface block which enables split-transaction communication performed through issuing of a response from a completer to a request issued by a requester,
• wherein an interrupt process for request retransmission is performed by setting a time-out flag when there is no response from the completer within a predetermined time, and
• wherein the high-speed serial interface block comprises:
• a reception buffer for retrieving a received packet;
• a received packet size counter capable of detecting an overflow in the reception buffer by counting a size of the packet received by the reception buffer;
• and
• a control unit for causing execution of a predetermined interrupt process by setting the time-out flag, when the overflow in the reception buffer is detected by the received packet size counter, in response thereto.

A microcomputer comprising:

• a high-speed serial interface block which enables split-transaction communication performed through issuing of a response from a completer to a request issued by a requester;
• and
• a central processing unit coupled to be capable of transmitting and receiving various signals between itself and the high-speed serial interface block, wherein
• an interrupt process for request retransmission is performed in the central processing unit by setting a time-out flag when there is no response from the completer within a predetermined time,
• wherein the high-speed serial interface block comprises:
• a reception buffer for retrieving a received packet;
• a received packet size counter capable of detecting an overflow in the reception buffer by counting a size of the packet received by the reception buffer;
• and
• a control unit for causing the central processing unit to execute the interrupt process for request retransmission by setting the time-out flag, when the overflow in the reception buffer is detected by the received packet size counter, in response thereto.