CLBs: With the aim of evaluating the majority of CLB internal resources, the use of logic blocks which use the maximum possible number of each CLB’s combinational and sequential components is proposed. This proposal implies, for example,downloading a MUXF8 onto each CLB, which would use the CLB’s LUT, internal multiplexers and fast carry resources [15],together with the interconnection resources joined to two Flip-Flops (FF) (see Fig. 6). The test vector is composed of a high level bit and a low level bit which are transmitted by each multiplexor channel. This is then registered by the FF and the test result is sent via the two exits contained in this design (results of Slices Y and X). If this is captured by the FMother exactly as it
was sent,this indicates that each Slice is functioning correctly (Fig.7)