The MB90860A-series is Fujitsu 16-bit general-purpose microcontroller which enhances each kind of timers and communication macros. With the new 0.35 m CMOS technology, Fujitsu now offers 128 Kbytes on-chip FLASHROM program memory. An internal voltage booster removes the necessity for a second programming voltage. The power supply (3 V) is supplied to the internal MCU core from an internal regulator circuit. This creates a major advantage in terms of EMI and power consumption. The internal PLL clock frequency multiplier provides an internal 42 ns instruction cycle time from an external 4 MHz clock.