Patent ID: 7559003
Filing Date: 2009-07-07
Classification: G11C

Abstract:
1. A test apparatus comprising: a log data generating unit generating a plurality of log data indicative respectively of test results of a plurality of devices under test in response to data outputted from the devices under test; a plurality of first buffers each coupled to the log data generating unit to temporarily store an associated one of the log data indicative respectively of the test results of the devices under test; a selector unit coupled to each of the first buffers to select one of the first buffers, the selector unit thereby outputting the log data temporarily stored in the first buffers in series in order of selection of the first buffers; a second buffer coupled to the selector unit to temporarily store the log data outputted from the selector unit and outputting the log data temporarily stored therein; and a log data storing unit having an input terminal coupled to the second buffer to receive the log data and an output terminal, the log data storing unit storing the log data on the input terminal in response to a write request and outputting the log data stored therein onto the output terminal in response to a read request which is made asynchronously with and independently of the write request, wherein one or more of the log data, which have already been stored in the log data storing unit, may be read out therefrom prior to writing subsequent one or more of the log data into the log data storing unit.