Nyquest NY8A051H

The NY8A051H is an 8-bit microcontroller using EPROM as memory, designed for multi-IO product applications such as remote controls, fan/lighting control, and gaming peripherals. Manufactured with CMOS process technology, it offers notable advantages including low cost and high performance. The NY8A051H core is built on a RISC architecture that enables easy programming and control, featuring a total of 55 instructions. Except for a few instructions that require 2 clock cycles, most instructions complete in a single clock cycle, allowing users to implement various applications through straightforward program control.

In terms of I/O resources, the NY8A051H provides 6 flexible bidirectional I/O pins, each individually controlled by dedicated registers as either input or output. Additionally, each I/O pin supports programmable functions such as pull-up or pull-down resistors and Open-Drain output. For infrared remote control applications, the NY8A051H integrates a built-in infrared carrier transmitter port with selectable frequency.

The NY8A051H includes two timer modules, which can use the system clock for general timing applications or be triggered by external signals for counting. In addition, the NY8A051H provides one 8-bit resolution PWM output or buzzer output, suitable for driving motors, LEDs, buzzers, and similar loads.

The NY8A051H employs a dual-clock mechanism, with both high-speed and low-speed oscillation provided by an internal RC oscillator. Under the dual-clock mechanism, the NY8A051H supports multiple operating modes — Normal mode, Slow mode, Standby mode, and Halt mode — to reduce power consumption and extend battery life.

In power-saving modes such as Standby mode and Halt mode, various events can trigger interrupts to wake the NY8A051H, returning it to Normal mode or Slow mode to handle asynchronous events.

• Wide operating voltage: 2.0V~5.5V at system frequency ≤8MHz; 2.2V~5.5V at system frequency >8MHz
• Wide operating temperature: -40℃~85℃
• ESD protection up to ±5KV
• Built-in 16-level precision low voltage detection circuit
• 1Kx14 bits EPROM
• 48 bytes SRAM
• 6 individually direction-controllable I/O pins (GPIO), PB[5:0]
• PB[3:0] selectable built-in pull-down resistors on input; three input configurations available (TTL/CMOS/Without Schmitt)
• PB[3] built-in pull-up resistor with high-drive output capability
• PB[5:0] selectable pull-up resistor or Open-Drain output
• All I/O output pins: selectable Small Sink Current or normal sink current
• All I/O output pins: selectable Small Drive Current or normal drive current
• 8-level program Stack
• Direct and indirect addressing modes for data access
• One 8-bit up-counting Timer (Timer0) with programmable frequency prescaler
• One 8-bit down-counting Timer (Timer1) with selectable auto-reload or continuous count-down
• One 8-bit PWM output (PWM1)
• One buzzer output (BZ1)
• Selectable 38/57KHz infrared carrier frequency with data-selectable carrier polarity
• Built-in Power-On Reset circuit (POR)
• Built-in Low Voltage Reset (LVR)
• Built-in WDT, firmware-controllable enable/disable
• Dual-clock mechanism with on-the-fly switching between high-speed and low-speed oscillation: High-speed: I_HRC (internal 1~20MHz high-speed RC oscillator); Low-speed: I_LRC (internal 32KHz low-speed RC oscillator)
• Four operating modes for adjustable current consumption: Normal mode, Slow mode, Standby mode, and Halt mode
• Six hardware interrupts: Timer0 overflow, Timer1 borrow, WDT, PB input state change, external interrupt input, low voltage detection
• NY8A051H six wake-up interrupts in Standby mode: Timer0 overflow, Timer1 borrow, WDT, PB input state change, external interrupt input, low voltage detection
• NY8A051H three wake-up interrupts in Halt mode: WDT, PB input state change, external interrupt input

• Remote control
• Fan/lighting control
• Gaming peripheral