One 8-bit up-count timer (Timer0) with programmable prescaler. Built-in Power-On Reset (POR). Built-in Low-Voltage Reset (LVR). Built-in Watch-Dog Timer (WDT) enabled/disabled by firmware control. Dual-clock oscillation: System clock can switch between high oscillation and low oscillation. High oscillation: I_HRC (Internal High Resistor/Capacitor Oscillator ranging from 1M~20MHz) Low oscillation: I_LRC (Internal 32KHz oscillator) Four kinds of operation mode to reduce system power consumption: Normal mode, Slow mode, Standby mode and Halt mode. Three hardware interrupt events: Timer0 overflow interrupt. PB input change interrupt. External interrupt. Three interrupt events to wake-up NY8A050D from Standby mode: