AT89C51ED2-RDTUM Microcontrollers

One such high-performance CMOS Flash 8-bit microcontroller is the AT89C51ED2-RDTUM.

It is based on the 80C51. Code and data are stored in a 64-KiByte Flash memory block. Software or an ISP can be used to rewrite the contents of the 64-Kbyte Flash memory in either parallel or serial mode. The standard VCC pin is used to create the programming voltage inside. Internal RAM of 256 bytes, a 9-source 4-level interrupt controller, and three timer/counters are carried over from the Microchip 80C52 to the AT89C51RD2/ED2.

The AT89C51ED2 has 2048 bytes of EEPROM for storing information that can be accessed even if the power is cut.

In addition, the AT89C51ED2-RDTUM  comes with a Keyboard, SPI interface, Programmable Counter Array, 1792 bytes of XRAM, a Hardware Watchdog Timer, and a more flexible serial channel that supports multiprocessor communication (EUART), as well as a speed increase mechanism (X2 Mode). Bringing the clock frequency down to any value, including DC, without data loss is possible thanks to the static design of the AT89C51ED2-RDTUM.

The AT89C51ED2-RDTUM contains an 8-bit clockprescaler and two power-saving modes that may be selected in software to significantly lower power consumption. While the central processing unit is idle, the peripherals and interrupt system continue functioning normally. The power-down mode saves RAM and disables all other features. The AT89C51RD2/ED2 is a more robust option for applications like alarms, corded phones, motor control, and smart card readers that require pulse width modulation, high-speed I/O, and counting capabilities.

AT89C51ED2-RDTUM Key Features

It is 80C52 Compatible

• Instruction Compatible with 8051
• Six I/O Ports for 8-bit (64 Pins or 68 Pins Versions)
• Four I/O ports for 8 bits (44 Pins Version)
• 3×16-bit Timer/Counters
• RAM Scratch Pad, 256 Bytes

9 Interrupt Sources with 4 Priority Levels

• Internal Power Supply is Under the Control of an Integrated Power Monitor (POR/PFD).
• Using a regular VCC power supply for ISP (In-System Programming).
• Low-Level Flash Programming Routines and a Default Serial Loader are contained in the 2048 bytes boot ROM.
• Rapid architecture.

In Standard Mode

• 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)
• 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)

In X2 mode (6 Clocks/machine cycle)

• 20 MHz (Vcc 2.7V to 5.5V, both external Internal and code execution)
• 30 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)

64K Bytes On-chip Flash Program or Data Memory

• (128 bytes) Byte Erase and Write.
• 100k Write Cycles

Expanded RAM of 1792 bytes on-chip (XRAM)

• the software allows for size selection (0, 256, 512, 768, 1024, 1792 Bytes)
• At Reset, 768 Bytes Are Selected for T89C51RD2 Compatibility

On-chip 2048 Bytes EEPROM Block for Data Storage (AT89C51ED2 Only)

• Has 100K Write Cycles.
• Equipped with a dual data pointer.
• For slow peripherals/RAM, it has a Variable Length MOVX.
• With Independent CPU and Peripheral Selection, it has Improved X2 Mode.
• Port 1 includes a Keyboard Interrupt Interface.
• This device has SPI Interface (Master/Slave Mode).
• 8-bit Clock Prescaler is one of its characteristics.

Asynchronous Port Reset

• Full-duplex is a more improved UART with low EMI and internal baud rate generator (Inhibit ALE).
• Hardware Watchdog Timer, Power-off Flag, One-Time Enabled with Reset-Out.
• Idle mode and power-down mode are two power control modes.
• Lone ranges from 2.7 to 5.5 volts of power supply.
• Industry Temperature Range (-40 to +85°C).
• Packages: VQFP44, PLCC44, PLCC68, and VQFP64.

AT89C51ED2-RDTUM Specifications

Frequently Asked Questions

What are CMOS and its uses?

Integrated circuits (ICs), often known as chips or microchips, are typically constructed using a semiconductor technology known as complementary metal-oxide semiconductors (CMOS). MOSFET technology is the foundation upon which CMOS transistors are built. MOSFET stands for a metal-oxide-semiconductor field-effect transistor.

What is CMOS flash memory?

On a computer’s motherboard is a small amount of memory known as complementary metal-oxide-semiconductor (CMOS). This memory stores the Basic Input/Output System (BIOS) settings. The software saved on the memory chip located on the motherboard is called the BIOS.

What does means 8-bit microcontroller mean?

The word “8-bit” most commonly refers to the bit-width of the CPU; hence, a microcontroller that is 8 bits wide will have a CPU that is 8 bits wide. This indicates that all of the internal operations are performed on 8-bit values, that the stored variables are in 8-bit blocks, and that the busses used to access the external inputs and outputs are also 8 bits.

Why is it called 8-bit?

This refers to the maximum data unit size a computer can process, often known as its “word size.” Because a 1-bit may take on either the value 1 or 0, it can store information in any of those states.

Conclusion

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