Overview
The AT89C51ED2 is a high-performance CMOS Flash version of the 80C51 single-chip 8-bit microcontroller, manufactured by Atmel (now part of Microchip Technology). This microcontroller retains all the features of the Atmel 80C52 and adds several advanced functionalities. It is designed to provide a robust and versatile solution for various applications requiring high-speed I/O, counting capabilities, and nonvolatile data storage.
Key Specifications
| Specification | Details |
|---|---|
| Program Memory Size | 64 KB (64K x 8) Flash |
| Internal RAM | 256 bytes + 1792 bytes XRAM (software selectable) |
| Data EEPROM | 2048 bytes (AT89C51ED2 only) |
| Interrupt Sources | 9 sources with 4 priority levels |
| Timer/Counters | Three 16-bit Timer/Counters |
| Operating Voltage | 2.7V to 5.5V |
| Operating Frequency | Up to 60 MHz (internal code execution), up to 40 MHz (internal and external code execution) |
| Power Consumption Modes | Idle Mode, Power-down Mode |
| Temperature Range | -40°C to +85°C |
| Packages | PLCC44, VQFP44, PLCC68, VQFP64 |
Key Features
- 80C52 compatible with 8051 instruction set
- Six 8-bit I/O ports (64/68 pins versions) or four 8-bit I/O ports (44 pins version)
- Programmable Counter Array (PCA) with high-speed output, compare/capture, pulse width modulation, and watchdog timer capabilities
- SPI interface (Master/Slave mode)
- Full-duplex Enhanced UART with dedicated internal baud rate generator
- Keyboard interrupt interface on Port 1
- Hardware Watchdog Timer and Power-off Flag
- In-System Programming (ISP) using standard VCC power supply
- Improved X2 mode with independent selection for CPU and each peripheral
- Low EMI (Inhibit ALE)
Applications
The AT89C51ED2 is suitable for a wide range of applications that require high-speed I/O, counting capabilities, and nonvolatile data storage. Some examples include:
- Motor control systems
- Alarm systems
- Corded phones
- Smart card readers
- Industrial automation
- Embedded systems requiring robust and versatile microcontrollers
Q & A
- What is the program memory size of the AT89C51ED2?
The program memory size is 64 KB (64K x 8) Flash.
- How much internal RAM does the AT89C51ED2 have?
The AT89C51ED2 has 256 bytes of internal RAM and 1792 bytes of XRAM (software selectable).
- Does the AT89C51ED2 have EEPROM?
Yes, the AT89C51ED2 has 2048 bytes of EEPROM for nonvolatile data storage.
- What are the operating voltage and frequency ranges of the AT89C51ED2?
The operating voltage range is 2.7V to 5.5V, and the operating frequency can be up to 60 MHz (internal code execution) or up to 40 MHz (internal and external code execution).
- What power consumption modes are available on the AT89C51ED2?
The AT89C51ED2 has Idle Mode and Power-down Mode for reducing power consumption.
- What is the temperature range for the AT89C51ED2?
The temperature range is -40°C to +85°C.
- What packages are available for the AT89C51ED2?
The available packages include PLCC44, VQFP44, PLCC68, and VQFP64.
- Does the AT89C51ED2 support In-System Programming (ISP)?
Yes, it supports ISP using the standard VCC power supply.
- What are some of the key features of the AT89C51ED2's Programmable Counter Array (PCA)?
The PCA features include high-speed output, compare/capture, pulse width modulation, and watchdog timer capabilities.
- What communication interfaces are available on the AT89C51ED2?
The AT89C51ED2 includes SPI interface (Master/Slave mode) and a full-duplex Enhanced UART with a dedicated internal baud rate generator.
