The TMP82C37BM-8 is a CMOS programmable direct memory access (DMA) controller manufactured by Toshiba. It facilitates high-speed data transfer between memory and peripheral devices without constant CPU intervention, improving system performance.

Applications

• Disk controllers
• Graphics cards
• High-speed data acquisition systems
• Network interfaces
• Industrial control systems

Features

• Four independent DMA channels
• Supports memory-to-memory, memory-to-I/O, and I/O-to-memory transfers
• Programmable transfer modes: single transfer, block transfer, demand transfer, cascade transfer
• Auto-initialization capability
• Terminal count output
• Cascade mode capability for expanding DMA channels
• CMOS technology for low power consumption

Benefits

• Enhances system performance by offloading data transfer tasks from the CPU.
• Enables high-speed data transfer between memory and peripherals.
• Reduces CPU overhead, allowing it to focus on other tasks.
• Provides flexible DMA control with programmable transfer modes.
• Conserves power with CMOS technology, suitable for embedded applications.

Additional Details

The TMP82C37BM-8 operates from a single +5V power supply. It supports various transfer modes, including single transfer (one byte at a time), block transfer (multiple bytes in a continuous block), demand transfer (transfer on request from the peripheral), and cascade transfer (linking multiple DMA controllers for expanded channel capacity). The auto-initialization feature allows the DMA controller to automatically reload the starting address and byte count after a transfer is complete. The terminal count (TC) output signals the end of a DMA transfer. Cascade mode allows multiple DMA controllers to be connected to provide additional DMA channels. The -8 likely signifies speed grade of the device. Using the corresponding datasheet from Toshiba is key for proper design implementation.