Bus system

A bus system, comprising:

• a bus to which a plurality of functional blocks are connected;
• a counter;
• and
• a system manager separated from the plurality of functional blocks,
• wherein the plurality of functional blocks includes a first functional block including a first protector, and a second functional block,
• wherein the second functional block generates and transmits a first command to the first functional block,
• wherein the system manager resets the first functional block when an operation of the first functional block is stopped and the first command does not exist on the bus,
• wherein the system manager resets the second functional block when an operation of the second functional block is stopped and the second functional block receives a first response corresponding to the first command,
• wherein the counter determines whether a number of first commands transmitted to the first functional block is the same as a number of dummy signals received from the first functional block, and
• wherein the first bus protector receives the first command on behalf of the first functional block and transmits a dummy signal corresponding to the first command to the second functional block, when the first functional block is in a first state.

A bus system, comprising:

• a first slave functional block provided with a first bus protector dedicated to the first slave functional block;
• a second slave functional block provided with a second bus protector dedicated to the second slave functional block;
• a master functional block that transmits a first command to the first slave functional block and transmits a second command to the second slave functional block;
• and
• a system manager, separated from the first slave functional block and the second slave functional block and from the first bus protector and from the second bus protector, that controls the first slave functional block, the second slave functional block, and the master functional block,
• a counter that determines whether a number of first commands transmitted to the first slave functional block is the same as a number of dummy signals received from the first slave functional block,
• wherein the first bus protector receives the first command on behalf of the first slave functional block,
• wherein the first bus protector transmits a first dummy signal corresponding to the first command to the master functional block, when the first slave functional block is in a first state of not being able to receive the first command or not being able to transmit a response signal corresponding to the first command,
• wherein the system manager generates and transmits a third command for stopping an additional generation of the first command to the master functional block, when the first slave functional block is in the first state,
• wherein the system manager resets the first slave functional block when the first command does not exist on the bus and the first slave functional block is in the first state, and
• wherein the second slave functional block transmits a response signal corresponding to the second command to the master functional block.