The single-cycle datapath conceptually described in this section must have separate instruction and data memories, because:. a. the formats of data and instructions are diff erent in MIPS, and hence different memories are needed. b. having separate memories is less expensive. c. the processor operates in one cycle and cannot use a single-ported memory for two different accesses within that cycled. the formats of data and instructions are different in MIPS, and hence different R-type instructions are needed .