| 摘要 |
PURPOSE: A bus circuit of the reduced maximum power consumption by using a delay difference of the signal transfer between bus lines is provided to reduce the maximum I/O(Input/Output) power consumption more and more without needing an additional bus line or an additional circuit for encryption/decryption. CONSTITUTION: The bus lines are divided into several groups. Dividing one clock cycle into more small intervals between groups of each bus line, the bus lines of each group have a variance of a bus signal value with a fixed delay. The fixed delay called skew is realized by inserting delay devices(12) into a position between a flipflop(11), which is an output buffer, and a pad(13). The delay devices have a delay value differed from each bus line of the circuit(1) sending a bus signal between two circuits exchanging the signal through an I/O circuit.
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