| 摘要 |
PURPOSE:To set plural driving capabilities to one output terminal by providing n-set of output drive circuits connected in parallel with the output terminal and a control circuit activating i-set of the said output driving circuits according to a control signal. CONSTITUTION:A drive signal 1 outputted from an internal circuit is inputted in parallel with a pre-buffer 2 and a control circuit 5 and the drive signal 1 inputted to the pre-buffer 2 is outputted to an output terminal 7 via an output buffer 3. On the other hand, the control circuit 5 controls whether or not the driving signal 1 inputted to the control circuit 5 is sent to an output buffer 6 of the next stage according to the level state of the control signal 4 inputted to the control circuit 5 separately. The control signal 4 can control plural output buffers in such a way and produced with an external input or internal logic constitution. |
