STC89C52RC-40I-PDIP40 Advanced New 51 Microcontroller Chip

Description

STC89C52RC-40I-PDIP40 Advanced New 51 Microcontroller Chip

The STC89C52RC-40I-PDIP40 is a microcontroller from STC Micro, based on the 8051 core. It is a popular choice for embedded systems due to its compatibility with the classic 8051 architecture and its enhanced features. Below are the detailed specifications for this microcontroller in the PDIP-40 package:

General Specifications:

• Architecture: 8-bit, based on the 8051 core.
• Package: PDIP-40 (Plastic Dual In-line Package, 40 pins).
• Operating Voltage: 3.3V to 5.5V.
• Operating Frequency: Up to 40 MHz (indicated by the “-40I” suffix).
• Flash Memory: 8 KB (program memory).
• RAM: 512 bytes.
• EEPROM: None (external EEPROM can be interfaced if needed).

Peripheral Features:

• I/O Ports: 4 x 8-bit ports (P0, P1, P2, P3), totaling 32 I/O pins.
• Timers/Counters: 3 x 16-bit timers (Timer 0, Timer 1, and Timer 2).
• Serial Communication:
  • 1 x UART (Universal Asynchronous Receiver Transmitter).
• Interrupts: 6 interrupt sources with 2 priority levels.
• Watchdog Timer: Built-in for system reliability.
• Power Saving Modes:
  • Idle Mode: Reduces power consumption when the CPU is idle.
  • Power-Down Mode: Minimizes power consumption when the device is not in use.

Package Details (PDIP-40):

• Pin Count: 40.
• Pin Pitch: 2.54 mm (standard DIP spacing).
• Dimensions: Approximately 52.3 mm x 13.9 mm.

Pin Configuration (PDIP-40):

• Power Pins:
  • VCC (Pin 40): Power supply (3.3V to 5.5V).
  • GND (Pin 20): Ground.
• I/O Ports:
  • P0.0 to P0.7 (Pins 39 to 32): Port 0 (open-drain, requires external pull-up resistors).
  • P1.0 to P1.7 (Pins 1 to 8): Port 1.
  • P2.0 to P2.7 (Pins 21 to 28): Port 2.
  • P3.0 to P3.7 (Pins 10 to 17): Port 3 (multifunctional pins for UART, interrupts, etc.).
• Reset Pin:
  • RST (Pin 9): Active-high reset input.
• Oscillator Pins:
  • XTAL1 (Pin 19): Input to the inverting oscillator amplifier.
  • XTAL2 (Pin 18): Output from the inverting oscillator amplifier.
• EA/VPP (Pin 31): External Access Enable (tied high for internal program execution).
• ALE/PROG (Pin 30): Address Latch Enable or programming pulse input.
• PSEN (Pin 29): Program Store Enable (used for external program memory).

Development Tools:

• Programmer: STC-ISP (STC In-System Programmer) for flashing the microcontroller.
• IDE: Keil µVision, SDCC (Small Device C Compiler), or other 8051-compatible IDEs.

Applications:

• Industrial control systems.
• Home appliances.
• Embedded systems.
• Educational projects (due to its simplicity and 8051 compatibility).

Key Advantages:

• Fully compatible with the classic 8051 instruction set.
• Low cost and widely available.
• Easy to use for beginners and hobbyists.

For more detailed information, refer to the official STC89C52RC datasheet from STC Micro.