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The HT70xxA-1 series devices area set of three terminal low power voltage detectors implemented in CMOS technology. Each voltage detector in the series detects a particular fixed voltage ranging from 2.2V to 5.0V. The voltage detectors consist of a high-precision and low power consumption standard voltage source as well as a comparator, hysteresis circuit, and an output driver. CMOS technology ensures low power consumption.
Although designed primarily as fixed voltage detectors, these devices can be used with external components to detect user specified threshold voltages.
Wide operating voltage range:
2.0V ~ 5.5V @system clock ≦8MHz.
2.2V ~ 5.5V @system clock ＞8MHz.
Wide operating temperature: -40°C ~ 85°C.
High ESD over ±5KV.
Built-in high-precision Low-Voltage Detector (LVD).
1K x 14 bits EPROM.
48 bytes SRAM.
6 general purpose I/O pins (GPIO), PB[5:0], with independent direction control.
PB[3:0] has features of Pull-High and Pull-Low resistor for input pin.
PB[5:0] has features of Pull-High resistor, and open-drain output.
ViH / ViL has three types to choose (TTL/CMOS/ Without Schmitt).
PB[3] built-in Pull-High resistor 80K.
8-level hardware Stack.
Direct and indirect addressing modes for data access.
One 8-bit up-count timer (Timer0) with programmable prescaler.
One 8-bit reload or continuous down-count timers (Timer1).
One 8-bit resolution PWM (PWM1) output.
One buzzer (BZ1) output.
Selectable 38/57KHz IR carrier frequency and high/low polarity according to data value.
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.
Six hardware interrupt events:
Timer0 overflow interrupt.
Timer1 underflow interrupt.
WDT timeout interrupt.
PB input change interrupt.
External interrupt.
LVD interrupt.
Six interrupt events to wake-up NY8A051F from Standby mode:
Timer0 overflow interrupt.
Timer1 underflow interrupt.
WDT timeout interrupt.
PB input change interrupt.
External interrupt.
LVD interrupt.
Three interrupt events to wake-up NY8A051F from Halt mode:
WDT timeout interrupt.
PB input change interrupt.
External interrupt.
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