The Z86C63/64 microcontroller introduces a new level of sophistication to single-chip architecture. The Z86C63/64 is a member of the Z8 single-chip microcontroller family with 32 Kbytes of ROM and 256 bytes of RAM. The Z86C63 is housed in a 40-pin DIP, and a 44-pin PLCC package, and is manufactured in CMOS technology. The ROMless pin option is available on the 44-pin version only. The Z86C64 is housed in a 64-pin DIP, and a 68-pin PLCC. Both versions of the Z86C64 have the ROMless pin option, which allows both external memory and preprogrammed ROM, enabling this Z8 microcontroller to be used in highvolume applications or where code flexibility is required. The Z86C96 ROMless Z8 will support the Z86C63/64. Zilog's CMOS microcontroller offers fast execution, more efficient use of memory, more sophisticated interrupts, input/output bit manipulation capabilities, and easy hardware/software system expansion along with low cost and low power consumption.