The 6551 Datasheet is a crucial document for anyone working with the 6551 Asynchronous Communications Interface Adapter (ACIA). This datasheet provides detailed technical specifications, operating characteristics, and application information necessary to effectively design, implement, and troubleshoot systems utilizing this versatile serial communication chip.
Decoding the 6551 Datasheet Understanding its Core Components
The 6551 datasheet serves as the definitive guide to understanding how the 6551 ACIA functions. It outlines the chip’s various registers, pins, and operational modes. It meticulously details how to configure the chip for different baud rates, data formats (e.g., number of data bits, parity, stop bits), and interrupt handling. Understanding these details is vital for establishing reliable serial communication between a microprocessor and peripheral devices, such as modems, printers, or other computers. It’s the key to ensuring your serial communication works as intended.
The datasheet typically contains several critical sections: pin descriptions, register maps, timing diagrams, and electrical characteristics. Pin descriptions clearly define the function of each pin on the 6551, allowing you to make the correct connections. Register maps illustrate the memory locations and bit assignments for controlling the ACIA’s operation. Timing diagrams show the precise timing requirements for signals like clock, read, and write, guaranteeing proper data transfer. Electrical characteristics specify voltage levels, current consumption, and other electrical parameters, ensuring the chip operates within safe limits. The 6551 has a lot of features, including these features in the 6551 Data sheet
- Detailed Pin Assignments
- Register Definitions and Control Bits
- Timing Diagrams for Read/Write Operations
- Electrical Characteristics (Voltage, Current)
- Example Usage Scenarios
In practice, a programmer uses the datasheet to write code that configures the 6551 to the desired communication parameters. For example, setting the baud rate, enabling or disabling parity checking, and selecting the number of stop bits. The datasheet also explains how to read data received by the 6551 and how to transmit data through the chip. The ability to control the transfer will assist in many situations. Example table is shown below
| Register | Address | Function |
|---|---|---|
| Control Register | $D000 | Sets baud rate, parity, and other parameters |
| Data Register | $D001 | Transmits and receives data |
To fully grasp the potential of the 6551 ACIA, you should consult the manufacturer’s original documentation. Look for a datasheet specifically designed for your version of the chip, as there can be subtle differences between manufacturers or revisions.