A94B114AEN

The A94B114AEN is an 8-bit CMOS microcontroller based on the CM8051-S (8051-compatible) core, designed for embedded control and small home appliance applications. It combines on-chip Flash, SRAM, multi-channel analog, PWM with dead-band control, and a compact surface-mount package to deliver a flexible, integrated control solution.

With up to 8 Kbytes of on-chip Flash, 512 bytes of SRAM (256 bytes IRAM + 256 bytes XRAM), multiple timers and peripherals, and power-saving modes, the A94B114AEN targets cost-sensitive designs that require precise analog input, PWM control and dependable system supervision over a wide supply and temperature range.

Key Features

• Core  CM8051-S 8-bit CPU (8051 compatible) with 1-clock-per-cycle operation for predictable instruction timing.
• Memory  8 Kbytes on-chip Flash with In-System Programming (ISP). Flash endurance and retention as specified in the datasheet: Endurance: 10,000 times (Sector 0~247), 50,000 timers (Sector 248~255); retention: 10 years. 256 bytes IRAM and 256 bytes XRAM (total 512 bytes).
• Power and Reset  On-chip Power-On Reset (POR), Low Voltage Reset (LVR) and Low Voltage Indicator (LVI) with multiple detect levels for system supervision; integrated LDO included.
• Timers & PWM  One 8-bit timer (T0) and two 16-bit timers (T1, T2). 16-bit PWM block with inverters and dead-band control (1 channel) for precise motor or power-stage drive.
• Analog  12-bit A/D converter with 8 input channels and selectable comparator with internal reference options (internal reference levels documented in the datasheet) for sensor and analog front-end tasks.
• Connectivity & Peripherals  Integrated serial interfaces including 1×USART and 1×I2C, plus CRC, Watchdog Timer (8-bit RCWDT with LFO) and other system peripherals.
• Oscillators & Clock  Internal high-frequency oscillator (32 MHz typical ±1.5% at 25°C) and internal low-frequency oscillator (256 kHz ±10% in Normal/IDLE). Supports external crystal/ceramic main clock from 0.4 to 16 MHz and operation up to 16 MHz.
• Low-Power Modes  IDLE and STOP power-down modes plus sub-active mode using the internal ring oscillator to minimize energy use during standby.
• GPIO  General-purpose I/O available across multiple ports (documented port map includes P0[7:0], P1[5:0], P2[3:0]).
• Package & Environmental  Surface-mount 16-SOPN (150 mil) package; operating temperature range −40 to +85 °C; VDD range 2.0 to 5.5 V.

Typical Applications

• Home Appliances  Control of small household appliances where compact MCU integration, PWM-driven motor control and multiple analog inputs are required.
• Motor and Power Control  Single-channel 16-bit PWM with dead-band and inverter support provides the timing control needed for brushless or brushed motor drive stages and power conversion.
• Sensor Hubs and Metering  12-bit ADC and comparator with internal reference levels enable accurate sensor interfacing and threshold detection in compact embedded systems.
• Human-Machine Interfaces  USART and I2C support simple display, keypad and peripheral communications for consumer and appliance UI tasks.

Unique Advantages

• Highly integrated control  On-chip Flash, SRAM, ADC, comparator, PWM and timers reduce BOM and board area for compact embedded designs.
• Precision analog capability  12-bit ADC and selectable comparator references enable reliable sensor measurement and analog thresholding without external components.
• Deterministic timing  CM8051-S core with 1-clock-per-cycle operation and hardware timers provide consistent instruction and peripheral timing for control tasks.
• Robust system supervision  POR, LVR, LVI and watchdog timer enhance system reliability and help protect against undervoltage and runaway conditions.
• Flexible clocking and low-power operation  Internal high- and low-frequency oscillators plus IDLE/STOP/sub-active modes allow designers to trade performance for power savings as needed.
• Field programmability  In-System Programming (ISP) of on-chip Flash supports firmware updates and in-field revisions.

Why Choose A94B114AEN?

The A94B114AEN is positioned for embedded applications that require a balance of analog fidelity, PWM control and compact system supervision in a small footprint. Its CM8051-S core delivers predictable timing while the on-chip 12-bit ADC, comparator, PWM with dead-band and multiple timers address common control and sensing needs without heavy external support.

This device suits designers of small home appliances and other embedded systems who need an integrated microcontroller with ISP-capable Flash, power management features and a wide supply and temperature range. The A94B114AEN offers a straightforward migration path for projects that prioritize integration, reliability and compact packaging.

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