| 摘要 |
<p>PURPOSE:To output data from a control circuit, which executes instructions in synchronism with an internal synchronizing signal, to the outside a synchronous high-speed timing with the internal synchronizing signal. CONSTITUTION:This one-chip microcomputer is equipped with an internal synchronizing signal generating circuit 2b which generates the internal synchronizing signal, the control circuit 2a which executes instructions in synchronism with the signal, a data holding circuit 2c which holds multibit data from the control circuit 2a, an input terminal to which the external output enable signal 5 is inputted from outside the one-chip microcomputer 1, an output terminal from which a multibit data output is sent to the outside, and a logic circuit 3 which inputs the multibit data of the data holding circuit 2c and the output enable signal, and outputs multibit data fixed at a 1st or 2nd level to outside the one- chip microcomputer 1 through the output terminal when the output enable signal indicates output inhibition or multibit data of the 1st or 2nd level corresponding to the data contents of the respective bits when the output enable signal indicates an output permission state.</p> |
