The Z86E0412PSG1866 is an One-time programmable (OTP) 8-bit Microcontroller based on single-chip Z8? MCU family that allow easy software development, debug, prototyping and small production runs not economically desirable with masked ROM versions. For applications demanding powerful I/O capabilities, the dedicated input and output lines are grouped into three ports and are configurable under software control to provide timing, status signals or parallel I/O. Two on-chip counter/timers, with a large number of user selectable modes, offload the system of administering real-time tasks such as counting/timing and I/O data communications.