| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device in which setting to a test mode can be surely confirmed without increasing test terminals. SOLUTION: The semiconductor device 1 is provided with a normal mode, a plurality of test modes, and a setting confirming mode as an operation mode. A test mode signal generating circuit outputs a signal TMCE corresponding to the setting confirming mode in addition to test mode signals ZTM0-ZTMm corresponding respectively to a plurality of test modes. A comparing circuit compares signals X0-Xm outputted by a pre-decoder 24 when the signal TMCE is in an activation state with the test mode signals ZTM0-ZTMm, and outputs it to a DQ terminal through a data bus DB. It can be confirmed whether a test mode is set or not without increasing test terminals from which a test mode signal for confirmation is outputted. COPYRIGHT: (C)2003,JPO
|
