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D8237AC-5
D8237AC-5 is a programmable direct memory access controller used for data transfers in computer systems.
D8237AC-5
D8237AC-5 is a programmable direct memory access controller used for data transfers in computer systems.
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D8237AC-5 DataSheet
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Details
The D8237AC-5 is a programmable direct memory access (DMA) controller designed by Intel. It is a 4-channel DMA controller with 16-bit address and data buses. The D8237AC-5 supports burst mode for high-speed data transfer between peripherals and memory without CPU intervention.This DMA controller has a maximum transfer rate of 5 megabytes per second and operates with a clock frequency of 5 MHz. It has a 48-pin ceramic dual in-line package (DIP) and is typically used in embedded systems, I/O controllers, and other applications where data transfer efficiency is key.The D8237AC-5 features four independent DMA channels that can be programmed for different transfer modes, including single transfer, block transfer, and demand transfer. It also supports cascading for systems requiring more than four channels of DMA.This DMA controller has built-in error detection and correction capabilities, ensuring reliable data transfer between devices. It also has a priority arbitration scheme to manage multiple requests for DMA transfer.In conclusion, the D8237AC-5 is a versatile and efficient DMA controller with multiple channels, high-speed data transfer capabilities, and various programmable features making it suitable for a wide range of embedded system applications
Key Features
- Direct Memory Access Controller
- Operates at 5 MHz
- Integrated with 8237A-5
- Supports 4 channels
- 16-bit address bus
- Polled mode operation
- Single-byte address transfers
- Advanced priority resolution logic
- Compatible with various microprocessors
Application
- Data communication systems
- Embedded systems
- Microprocessor interfaces
- Industrial control systems
- Telecommunication systems
- Network interfaces
- Robotics
- Sensor interfaces
- Data acquisition systems
- Automated testing equipment
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Manufacturer | NEC | Product Category ! | IC Chips |
FAQs
What is D8237AC-5?
The D8237AC-5 is a programmable direct memory access (DMA) controller designed by Intel. It is commonly used in microprocessor-based systems to offload data transfer tasks from the central processing unit (CPU) to improve overall system performance.
How Does D8237AC-5 Work?
The D8237AC-5 works by controlling the data transfer between memory and external devices without CPU intervention. It features multiple channels for concurrent data transfers, and programmable functionality for flexible data movement operations. This allows the CPU to focus on processing tasks while the DMA controller efficiently manages data transfers.
How Many Pins does D8237AC-5 have and What are the Functions of the Pinout Configuration?
The D8237AC-5 is typically housed in a 40-pin DIP (Dual Inline Package) or PLCC (Plastic Leaded Chip Carrier) package. The pinout configuration includes:
- A0-A3: Address lines for chip select.
- CS0-CS3: Chip select inputs.
- RD: Read strobe input.
- WR: Write strobe input.
- DC0-DC3: DMA channel status lines.
- D0-D7: Data bus for bi-directional data transfer.
- S0-S3: Set request inputs for DMA channels.
- HRQ: Hold request input.
- HLDA: Hold acknowledge output.
- A0-A15: Address bus for memory and I/O interfacing.
What are the Pros and Cons of D8237AC-5?
Pros:
- Improved System Performance: Offloads data transfer tasks from the CPU, allowing it to focus on processing operations.
- Concurrent Operations: Supports multiple channels for concurrent data transfers, optimizing system throughput.
- Programmable Functionality: Provides flexibility in data transfer operations through programmable control registers.
- Interfacing Capabilities: Interfaces with the CPU, memory, and external devices for seamless data movement.
Cons:
- Complex Configuration: Requires careful programming and configuration for proper operation.
- External Interfacing: May require additional interface logic and components for system integration.
- Handling Considerations: The 40-pin package may require careful handling during assembly and installation.
Are There Any Equivalents/Alternatives to D8237AC-5 for Recommendation?
- The 8237A-5 from AMD is a functional equivalent to the D8237AC-5.
- Alternatives to the D8237AC-5 include the 82C37A from Integrated Device Technology (IDT) and the Z8536 from Zilog.
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