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The CDP65C51E2 is an asynchronous communications interface adapter (ACIA) manufactured by Intersil. Below are its specifications, descriptions, and features:

Specifications:

• Manufacturer: Intersil
• Type: Asynchronous Communications Interface Adapter (ACIA)
• Compatibility: 65C02/65C816 Microprocessor Family
• Operating Voltage: 5V ±10%
• Data Rate: Up to 1 Mbps (with external clock)
• Interface: Serial (RS-232 compatible)
• Package: 28-pin DIP (Dual In-line Package)
• Operating Temperature Range: -40°C to +85°C

Descriptions:

• The CDP65C51E2 is a CMOS-based ACIA designed for serial data communication.
• It provides full-duplex asynchronous serial communication with programmable baud rates.
• Compatible with the 65C02 and 65C816 microprocessors, it simplifies serial interfacing in embedded systems.
• Features include a built-in baud rate generator, interrupt capability, and flexible control/status registers.

Features:

• Full-Duplex Operation: Simultaneous transmit and receive capabilities.
• Programmable Baud Rate: Supports various baud rates via an external clock or internal divider.
• Interrupt-Driven Operation: Supports processor interrupts for efficient data handling.
• RS-232 Compatibility: Interfaces with standard serial communication devices.
• Low Power Consumption: CMOS technology ensures efficient power usage.
• Software Configurable: Control registers allow customization of data format, parity, and stop bits.

This device is primarily used in embedded systems requiring serial communication with peripherals or other microprocessors.