| 摘要 |
PURPOSE:To dissolve complication in the control of a general purpose input/ output port for a test by enabling a panel to be tested under the same condition as it is in the actual operation by carrying the same CPU on a panel tester as drives the panel to be tested so that it gets a direct bus interface with the panel. CONSTITUTION:A CPU7 of a tester the same as provided on a panel 4 to be tested gets a direct bus interface with the panel 4 while other input/output are allowed to have an interface with a general purpose input/output port 3. As there is no general purpose input/output port between the tester and the panel, any operation can be directed as done in the actual operation while making the interface timing identical as well. This enables the panel 4 being tested to be driven under the same interface condition. The panel 4 acts as specified and outputs a specified value to a general input/output terminal 6. The CPU of the tester reads this value through the general purpose input/output port 3, checks it upon with an expected value and then, indicates the judgement on the propriety of the results. |
