| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a semiconductor apparatus capable of normally initializing an internal circuit without being influenced by a starting sequence, the timing, etc. of a power source, and for inhibiting a through current at the time of starting and the falling of the power source. <P>SOLUTION: An internal power source detecting circuit 103 is designed to detect a voltage of an internal power source generating circuit 100 for making an internal circuit 102 operate becoming to a voltage in which the internal circuit 102 becomes operable. Then an IO1 power source detecting circuit 204 is designed to detect a voltage of an IO1 power source 200 becoming to the voltage in which a reset circuit 202 and an interface 1 circuit 203 can be operable. Input output permitting signals 106a, 207 are generated from a detection signal 104 of the internal power source detecting circuit 103 and a detection signal 205 of the IO1 power source detecting circuit 204 in an input output permitting signal producing circuit A105 and an input output permitting signal producing circuit B206. Then the control of propagation and the rejection of a signal between the internal circuit 102 of an input output control circuit 400 and the reset circuit 202, and the interface 1 circuit 203. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
