| 摘要 |
<p>PURPOSE:To provide the microcomputer for excluding data outputs out of an expected value at an input/output port in the case of resetting. CONSTITUTION:This microcomputer is provided with an output latch 4 to fetch, hold output data from an internal bus 201 to the input/output port corresponding to the internal bus 201 for transferring internal data and to output an output data signal 104, input/output switching latch 5 to fetch, hold input/output switching data from the internal bus 201 and to output an input/output switching signal 102, output buffer 3 to switch the output permit/inhibit mode of data according to the input/output switching signal 102 and to output the output data signal 104 to an input/output terminal 51, bus driving circuit 8 to output an input data signal 105 to the internal bus 201 corresponding to a read permit/ inhibit signal 106, reset circuit 6 to transmit a reset signal 101 to the output latch 4 and the input/output switching latch 5, and delay circuit 7 to input the reset signal 101 and to transmit a delayed reset signal 103 to the output latch 4.</p> |
