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The STC90C58RD is a microcontroller manufactured by STC Micro. Below are its specifications, descriptions, and features:

Specifications:

• Core: 8051-compatible
• Operating Voltage: 3.3V – 5.5V
• Clock Speed: Up to 40MHz
• Flash Memory: 58KB (for program storage)
• RAM: 1280 bytes
• EEPROM: 16KB (for data storage)
• I/O Pins: 32 (4 ports: P0, P1, P2, P3)
• Timers/Counters: 3 (Timer 0, Timer 1, Timer 2)
• Serial Communication: UART (1 channel)
• ADC: None
• PWM: None
• Watchdog Timer: Yes
• Operating Temperature: -40°C to +85°C
• Package: LQFP-44, PDIP-40

Descriptions:

• The STC90C58RD is an enhanced 8051-based microcontroller with high-speed performance and low power consumption.
• It features 58KB of Flash memory for program storage and 16KB of EEPROM for data retention.
• Supports ISP (In-System Programming) and IAP (In-Application Programming) for easy firmware updates.
• Includes power-saving modes (Idle and Power-Down) for energy-efficient applications.

Features:

• High-Speed 8051 Core (1T mode, 12 clocks per machine cycle).
• Wide Voltage Range (3.3V – 5.5V).
• Enhanced ESD Protection for robustness.
• Multiple Interrupt Sources with 4 priority levels.
• Built-in Power-On Reset (POR) and Brown-Out Detection (BOD).
• Industrial-Grade Reliability with strong anti-interference capabilities.

This microcontroller is commonly used in industrial control, consumer electronics, and embedded systems requiring moderate processing power and reliable operation.