Bus system and method of controlling the same

A bus system comprising a master, a first slave, a second slave, and a bus operable to connect the master, the first slave, and the second slave, wherein

• the master is configured to be able to issue a second request to the second slave after issuing a first request to the first slave and before receiving a response to the first request,
• the bus comprises:
• a determination unit configured to, upon receiving the second request, determine whether to permit a transfer of the second request to the second slave;
• and
• a suspending unit configured to suspend the transfer of the second request to the second slave while it is determined by the determination unit that the transfer is not permitted, and
• wherein the determination unit determines whether or not the transfer is permitted based on a notification from the first slave regarding processing of the first request.