Semiconductor device having a plurality of semiconductor chips connected together by a bus

A semiconductor device, comprising:

• a transmitting section;
• and
• a receiving section, wherein
• the transmitting section and the receiving section are connected to each other through a bus,
• the transmitting section includes an encoding section for encoding data including a plurality of bits to produce bit-position information which indicates a position of at least one bit selected from the plurality of bits included in the data, and an output section for outputting the bit-position information onto the bus, and
• the receiving section includes an input section for receiving the bit-position information from the bus, and a decoding section for decoding the bit-position information to produce the data, wherein
• the at least one bit is a bit having a specific logic value,
• the transmitting section further includes a bit-number comparison information producing section for producing bit-number comparison information indicating whether or not a number of bits having the specific logic value is larger than a number of bits having a logic value other than the specific logic value in the plurality of bits included in the data, and the bit-number comparison information producing section is a means to produce a bit showing of whether either a number 1 or a number 0 is larger than the other within the data,
• the output section outputs the bit-position information and the bit-number comparison information onto the bus,
• the input section receives the bit-position information and the bit-number comparison information from the bus, and
• the decoding section decodes the bit-position information based on the bit-number comparison information to produce the data, and
• the bus has a smaller bit width than a bit width of the data.