CP82C89Z

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The CP82C89Z is a specialized integrated circuit (IC) that serves as an interface for VESA Local Bus (VL-Bus) motherboards. It supports basic functions such as configuration registers, control registers, and data buffers, allowing the control of multiple devices or peripherals on the VL-Bus. In this article, we will discuss the application field and working principle of the CP82C89Z.

Application Field

The CP82C89Z was designed as an interface for VL-Bus motherboards to connect multiple peripheral devices. It can be used in systems undergoing frequent configuration changes, such as desktops, laptops, ruggedized and portable computers, set-top boxes, gaming systems, video systems, and embedded systems. The CP82C89Z supports 32-bit transfers at speeds of 33MHz, which is a great improvement over the previous 8-bit and 16-bit speeds used on older VL-Bus systems.

With the CP82C89Z, up to seven peripheral devices can be connected to the VL-Bus. These devices include such products as graphics cards, audio cards, hard drives, CD-ROMs, ZIP drives, and networking cards. It also supports the use of user-defined configuration fields, allowing for optimal configuration flexibility for the end user.

Working Principle

The CP82C89Z operates with five basic components. First, the configuration registers maintain settings for the clock, start count, and bus neutralization settings. Second, the control registers select memory spaces, store codes, input commands, and receive data. Third, the command buffers temporarily store data while the control registers process it. Fourth, the data buffers collect and store data from memory or peripherals. Fifth, the VL-Bus arbiter allocates system resources and oversees the flow of data.

The CP82C89Z works by decoding the data address bus signals for the system and generating signals for VL-Bus peripherals. It also provides three-state buffering capabilities, allowing the memory address bus, data bus, and control signals to be shared among multiple devices. The command buffers allow different types of commands to take priority over each other, while the data buffers handle data transfers between memory and peripherals.

In addition, the CP82C89Z supports various power management features. These features allow the system to be optimized for low-power consumption, which is important for mobile devices. It can also be configured to support specific output devices, such as loudspeakers and LCD displays.

Conclusion

The CP82C89Z is an important interface for VL-Bus motherboards. It supports multiple peripheral devices, offers three-state buffering capabilities, and provides power management features. It is a versatile IC that can be used in a variety of applications, including desktops, laptops, set-top boxes, gaming systems, and embedded systems.

The specific data is subject to PDF, and the above content is for reference