STC12C5410AD The STC89C54RD is a microcontroller manufactured by STC (not ST). Here are its key specifications, descriptions, and features:
### **Specifications:**
- **Core:** 8051-based 8-bit microcontroller.
- **Flash Memory:** 16 KB (expandable up to 64 KB).
- **RAM:** 1.28 KB.
- **EEPROM:** 16 KB (for data storage).
- **Clock Speed:** Up to 35 MHz (adjustable via software).
- **Operating Voltage:** 3.3V to 5.5V.
- **I/O Pins:** 36 (with 4 ports: P0, P1, P2, P3).
- **Timers/Counters:** 3 (Timer 0, Timer 1, Timer 2).
- **Interrupts:** 8 sources with 4 priority levels.
- **UART:** 1 full-duplex serial port.
- **Watchdog Timer:** Built-in.
- **Power Modes:** Idle and Power-down modes for low power consumption.
- **ISP (In-System Programming):** Supports programming via serial port.
- **Operating Temperature:** -40°C to +85°C.
### **Descriptions:**
- The STC89C54RD is a high-performance, low-power microcontroller with enhanced 8051 architecture.
- It is widely used in embedded systems, industrial control, and consumer electronics.
- Features in-system programming (ISP) for easy firmware updates.
### **Features:**
- **Enhanced 8051 Core:** 1-clock-per-machine-cycle execution (12x faster than standard 8051).
- **High-Speed Operation:** Up to 35 MHz clock frequency.
- **Low Power Consumption:** Supports power-saving modes.
- **On-Chip EEPROM:** Allows flexible data storage.
- **Robust I/O Ports:** All ports support push-pull, open-drain, and high-impedance modes.
- **Hardware Watchdog Timer:** Improves system reliability.
- **Wide Voltage Range:** Operates from 3.3V to 5.5V.
- **Strong Anti-Interference:** High noise immunity for industrial applications.
Note: This microcontroller is produced by **STC (Hong Kong STC Microelectronics)**, not ST (STMicroelectronics).
