The Zilog Z84C1008PEC, commonly referred to as the Z80 DMA (Direct Memory Access) controller, is a peripheral device designed to enhance the data transfer capabilities of Z80 microprocessor-based systems. It allows for high-speed data transfers between memory and peripheral devices without constant CPU intervention.

Applications

• Disk Controllers: Used in disk controllers to enable fast data transfers between the disk drive and system memory.
• Graphics Controllers: Employed in graphics controllers to facilitate efficient transfer of image data.
• Network Interfaces: Integrated into network interfaces to enable high-speed data communication.
• Data Acquisition Systems: Utilized in data acquisition systems to transfer data from sensors to memory.
• High-Speed Peripherals: Enables interfacing with high-speed peripherals, such as tape drives and high-speed communication devices.

Features

• Direct Memory Access: Allows data transfers between memory and peripheral devices without CPU intervention.
• High-Speed Transfers: Supports high-speed data transfer rates.
• Programmable Transfer Modes: Offers various programmable transfer modes, including byte-by-byte, block, and continuous transfers.
• Address Generation: Generates memory addresses for data transfers.
• Interrupt Handling: Includes interrupt capabilities for signaling the CPU upon completion of data transfers.

Benefits

• Improved System Performance: Enhances system performance by offloading data transfer tasks from the CPU.
• Increased Data Transfer Rates: Enables high-speed data transfers, improving overall system throughput.
• Reduced CPU Overhead: Reduces CPU overhead, allowing the CPU to focus on other tasks.
• Flexibility: Programmable transfer modes provide flexibility to adapt to different application requirements.
• Efficient Memory Management: Facilitates efficient memory management by enabling direct data transfers to and from memory.

Additional Details

The Z84C1008PEC operates from a single 5V power supply. It is typically packaged in a 40-pin DIP (Dual In-line Package). It requires programming to configure the transfer parameters, such as source address, destination address, and transfer size. The operating temperature range is generally 0°C to 70°C. It's a key component in systems requiring high-speed data transfers between memory and peripherals.