of this chip are similar to those of the M37451 M4DXXXSP/FP except that this chip has a 8192 bytes PROM built-in. This single-chip microcomputer is useful for office automation appliances and consumer appliance controllers. In addition to its simple instwction sets, the PROM, RAM and I/O addresses are placed on the same memory map to enable easy programming. It also has a unique feature that enables it to be used as a slave microcomputer. Apart from the expansion in operating temperature range a.