6851 Datasheet

The 6851 Datasheet isn’t just a technical document; it’s the key to understanding and implementing asynchronous serial communication using the 6851 Asynchronous Communications Interface Adapter (ACIA). This datasheet provides all the necessary information to interface this chip with a microprocessor system, enabling reliable data transfer over serial lines.

Delving into the 6851 ACIA and its Datasheet

The 6851 Datasheet is the definitive guide for anyone working with the Motorola 6851 ACIA. It details the chip’s architecture, pin assignments, register functions, and timing characteristics. This allows developers to configure the ACIA for various serial communication protocols and baud rates. The document explains how to program the 6851 to transmit and receive data, handle interrupts, and manage error conditions. Understanding the 6851 Datasheet is crucial for achieving reliable serial communication in embedded systems. The datasheet offers a wealth of information organized logically:

• Pin Descriptions: Detailing the function of each pin on the chip.
• Register Definitions: Explaining the purpose and functionality of the control, status, and data registers.
• Timing Diagrams: Illustrating the timing requirements for various operations.
• Electrical Characteristics: Providing information on voltage levels, current consumption, and other electrical parameters.

The 6851 ACIA, when understood through its datasheet, is a flexible device. Consider the key configurable options:

1. Word Length: Defining the number of data bits in each character (e.g., 7 or 8 bits).
2. Parity: Enabling or disabling parity checking (e.g., even, odd, or no parity).
3. Stop Bits: Selecting the number of stop bits (e.g., 1 or 2 stop bits).
4. Baud Rate: Setting the data transmission speed.

Here is a simplified representation of key registers: