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NY8B072A is an EPROM based 8-bit MCU tailored for I/O based applications like home appliances or meter equipment. NY8B072A adopts advanced CMOS technology to provide customers remarkable solution with low cost, high performance and high noise immunity benefits. RISC architecture is applied to NY8B072A and it provides 55 instructions. All instructions are executed in single instruction cycle except program branch and skip instructions which will take two instruction cycles. Therefore, NY8B072A is very suitable for those applications that are sophisticated but compact program size is required.
NY8B072A provides 12 + 1 channel high-precision 12-bit analog-to-digital converter (ADC), and high-precision analog voltage comparator. They are suitable for any analog interface detection and measurement applications.
As NY8B072A address I/O type applications, it can provide 18 I/O pins for applications which require abundant input and output functionality. Moreover, each I/O pin may have additional features, like Pull-High/Pull-Low resistor and open-drain output type through programming. Moreover, NY8B072A has built-in large infrared (IR) carrier generator (340mA@3V) with selectable IR carrier frequency and polarity for applications which demand remote control feature.
NY8B072A also provides 4 sets of timers which can be used as regular timer based on system oscillation or event counter with external trigger clock. Moreover, NY8B072A provides 3 sets of 10-bit resolution Pulse Width Modulation (PWM) output and 3 sets of buzzer output in order to drive motor/LED and buzzer.
NY8B072A employs dual-clock oscillation mechanism, either high oscillation or low oscillation can be derived from internal resistor/capacitor oscillator or external crystal oscillator. Moreover, based on dual-clock mechanism, NY8B072A provides kinds of operation mode like Normal mode, Slow mode, Standby mode and Halt mode in order to save power consumption and lengthen battery operation life. Moreover, it is possible to use internal high-frequency oscillator as CPU operating clock source and external 32KHz crystal oscillator as timer clock input, so as to accurate count real time and maintain CPU working power.
While NY8B072A operates in Standby mode and Halt mode, kinds of event will issue interrupt requests and can wake-up NY8B072A to enter Normal mode and Slow mode in order to process urgent events.
Wide operating voltage range: (@ 4 CPU clock per instruction, i.e. 4T mode)
2.0V ~ 5.5V @system clock ≦8MHz.
2.2V ~ 5.5V @system clock ＞8MHz.
Wide operating temperature: -40°C ~ 85°C.
High ESD over ±8KV.
High EFT over ±4KV with Noise Filter Enable. (Operating voltage @5V)
2K x 14 bits EPROM.
128 bytes SRAM.
18 general purpose I/O pins (GPIO), PA[7:0], PB[7:0], PC[1:0] with independent direction control.
PA[5, 3:0] and PB[3:0] and PC[1:0] have features of Pull-Low resistor for input pin.
PA[7:0] and PB[7:0] and PC[1:0] have features of Pull-High resistor, the value of Pull-High resistor can be 100KΩ or 1MΩ. (PA5 is about 80KΩ)
PB[7:0] and PC[1:0] have features of Open-Drain output.
PA[5] have feature of input or open-drain output.
I/O ports output current mode can be constant sink, normal sink or large sink.
8-level hardware Stack.
Direct and indirect addressing modes for data access.
One 8-bit up-count timer (Timer0) with programmable prescaler.
Three 10-bit reload or continuous down-count timers (Timer1, 2, 3).
Three 10-bit resolution PWM (PWM1, 2, 3) output.
Three buzzer (BZ1, 2, 3) output.
Selectable 38/57KHz IR carrier frequency and high/low polarity according to data value.
IR carrier sink current can be normal sink current or 340mA large sink current.
Built-in high-precision Low-Voltage Detector (LVD).
Built-in 12+1 channel high-precision 12-bit ADC.
Built-in high-precision Voltage Comparator.
Built-in Power-On Reset (POR).
Built-in Low-Voltage Reset (LVR).
Built-in Watch-Dog Timer (WDT) enabled/disabled by firmware control.
Built-in Resistance to Frequency Converter (RFC) function.
Dual-clock oscillation: System clock can switch between high oscillation and low oscillation.
High oscillation:
E_HXT (External High Crystal Oscillator, above 6MHz)
E_XT (External Crystal Oscillator, 455K~6MHz)
I_HRC (Internal High Resistor/Capacitor Oscillator ranging from 1M~20MHz)
Low oscillation:
E_LXT (External Low Crystal Oscillator, about 32KHz) I_LRC (Internal 32KHz oscillator)
Four kinds of operation mode to reduce system power consumption:
Normal mode, Slow mode, Standby mode and Halt mode.
Twelve hardware interrupt events:
Timer0 overflow interrupt.
Timer1 underflow interrupt.
Timer2 underflow interrupt.
Timer3 underflow interrupt.
WDT timeout interrupt.
PA/PB input change interrupt.
3 set External interrupt.
LVD interrupt.
Comparator output status change interrupt.
ADC end-of-convert interrupt.
Twelve interrupt events to wake-up NY8B072A from Standby mode:
Timer0 overflow interrupt.
Timer1 underflow interrupt.
Timer2 underflow interrupt.
Timer3 underflow interrupt.
WDT timeout interrupt.
PA/PB input change interrupt.
3 set External interrupt.
LVD interrupt.
Comparator output status change interrupt.
ADC end-of-convert interrupt.
Five interrupt events to wake-up NY8B072A from Halt mode:
WDT timeout interrupt.
PA/PB input change interrupt.
3 set External interrupt.
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