Large logic machines are almost always designed as assemblies of smaller logic machines. To save time, the smaller sub-machines are isolated by permanently installed design for test circuitry and are tested independently. One common testing scheme provides a test mode that forces some part of the logic machine to enter a test cycle. The test cycle usually exercises large independent parts of the machine.
Large logic machines are almost always designed as assemblies of smaller logic machines. To save time, the smaller sub-machines are isolated by permanently installed design for test circuitry and are tested independently. One common testing scheme provides a test mode that forces some part of the logic machine to enter a test cycle. The test cycle usually exercises large independent parts of the machine.