| 摘要 |
PROBLEM TO BE SOLVED: To prevent stall, etc., of firmware processing due to generation of reset by distinguishing whether a received packet is a packet received at different reset intervals or not and writing each received packet and each generated distinguishing information in a packet storage means by relating each packet to each distinguishing information. SOLUTION: A RAM 80 by which random access is enabled and to store the packet, buses 90, 95, 99, 100 to be mutually separated and a mediation circuit 74 to connect the buses with a bus 110 of the RAM 80 are provided. An interval from one bus reset and the next bus reset is defined as a bus reset interval. The interval from the bus reset M to M+1 becomes the reset interval of M and the interval from the bus reset M+1 to M+2 becomes the bus reset interval M+1. Whether the received packet or the packet received next is the one received by different reset interval or not is distinguished.
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