| 摘要 |
<p>PURPOSE:To give a margin to CPU operation by suppressing the number of drives of external output terminals of a CPU chip and reducing the power consumption of the CPU chip. CONSTITUTION:A signal generating circuit 1 generates an address, data, etc., and outputs those address, data, etc., to an F/F circuit 2 and a selecting circuit 3. The F/F circuit 2 holds the output 101 of the signal generating circuit 1 and outputs its value to the selecting circuit 3. The selecting circuit 3 selects one of the output 101 of the signal generating circuit 1 and the output 102 of the F/F 2 according to an external fixed mode bit signal 103, and outputs the selected value to the outside of the CPU chip.</p> |
