The MC68230 Parallel Interface/Timer (PI/T) is a versatile peripheral device manufactured by Freescale Semiconductor (now NXP). Designed for use with the Motorola 68000 family of microprocessors, the MC68230P8 provides a flexible and efficient means of interfacing with a variety of external devices. It integrates parallel I/O ports and a timer function, making it suitable for a wide range of applications.

Applications

• Interfacing with parallel peripherals in embedded systems.
• Timing and control applications.
• Data acquisition systems.
• Industrial control systems.
• General-purpose input/output.

Features

• Two 8-bit Parallel I/O Ports: Provides flexible input/output capabilities for interfacing with external devices.
• Timer Function: Includes a programmable timer for generating interrupts or controlling external events.
• Programmable Data Direction: Each I/O line can be individually programmed as either an input or an output.
• Interrupt Handling: Capable of generating interrupt requests to the microprocessor based on external events.
• Handshake Control: Includes control lines for implementing handshake protocols with peripheral devices.
• Versatile Timer Modes: Supports various timer modes, including one-shot, periodic, and gated modes.

Benefits

• Versatile Interfacing: Allows a microprocessor to communicate with a wide range of parallel peripheral devices.
• Flexible I/O Configuration: Programmable data direction enables customization to specific application needs.
• Efficient Interrupt Handling: Reduces microprocessor overhead by allowing peripheral devices to signal when attention is needed.
• Integrated Timer Function: Simplifies system design by providing a built-in timer for timing and control applications.
• Improved System Performance: Enables parallel data transfer, improving the overall performance of the system.

Additional Details

The MC68230P8 is configured through a series of control registers, which define the data direction of each I/O line, the timer modes, and the interrupt settings. The timer can be used to generate interrupts at regular intervals, control the timing of external events, or measure the duration of pulses. The handshake control lines provide a mechanism for synchronizing data transfer between the microprocessor and the peripheral device. The device is often used in applications where parallel data transfer and precise timing are required, such as interfacing with printers, displays, and industrial control equipment. The MC68230P8 is a reliable and widely used PI/T that has been a staple in Motorola 68000-based systems for many years. Specific details on clock frequency, interrupt latency, and power consumption can be found in the device's datasheet.

It provides a cost-effective solution for applications requiring both parallel I/O and timer functionality.