VARIABLE FIELD CONTENT READING MEMORY

PURPOSE: To prevent waste of a memory bit by containing a content-addressable memory(CAM) word segment, a programer and a field selector. CONSTITUTION: The data are loaded to a four bits memory part 26 of a CAM word segment 12 through a memory bit line 22 when a word line selection signal 24 from a word address decoder is activated. The programer 14 decides a size of field, that is, the number of bits in the field of one word, and divides the field or cascade connects the field to a next unit cell according to logic levels of a field division signal 36 and its auxiliary signal 38. The output of the programer 14 is connected to a field selector 16, and selects a required field output (F1-F5) according to a field decoding signal 40 (FD1-FD5) generated by a field decoder. Thus, the waste of the bit is eliminated.