Intel PD672X/30/32/33 manual Layout Guidelines

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PD672X/30/32/33 — ZV Port Implementation

8.0Layout Guidelines

The VGA controller, the PC Card (PCMCIA) Controller, and the PC Card Sockets must be in close proximity to one another. This requirement is particularly important when the PD6832 or PD6833 device is used along with the ZV Port for Card bus implementation. According to tests conducted by PCMCIA ZV Port subcommittee, the stubs to the GD7548 device or any other VGA controller must be no longer than two inches. As shown in Figure 4 on page 11, the stub length is the distance between points P and R for PC Card bus A and between points X and Z for PC Card bus B. Vias have already been included in this recommended stub length.

•Maximum total capacitive loading for each Card bus signal = 22 pF

•Maximum input capacitance of each host controller pin = 10 pF

•Maximum input capacitance of the buffer pin = 5 pF

A total of 7 pF remains for the PC Card connector-to-buffer input pin trace. A maximum trace length of two inches satisfies CardBus requirements.

System designers must check the VCC bounce, ground bounce, and crosstalk on CardBus/ZV Port prototypes to ensure that the effect is minimal. The CCLK signal on the CardBus must be thick with sufficient gap from adjacent traces and series termination must be used. Guidelines for CCLK signal are included in the latest PC Card specifications.

Note: Intel recommends that designers contact the PCMCIA organization for the latest revision of the ZV Port standard.

Application Note

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Contents PD672X/30/32/33 ZV Port Implementation Application Note Contents PD672X/30/32/33 ZV Port Implementation Introduction Overview Zoomed Video ZVTypical ZV Port Implementation Typical ZV Port Implementation PD672X/30/32/33 ZV Port Implementation Dedicated Socket Approach to ZV Port Implementation Dedicated Socket Approach to ZV Port ImplementationBuffer Implementation for Audio DAC Buffer Implementation for Audio DACComments ZV Port Implementation for Socket a and BPC Card, ZV Port, and PD6722 Pin Assignment Sheet 1 PC Card ZV Port Pin PD6722SPC Card, ZV Port, and PD6722 Pin Assignment Sheet 2 PC Card, ZV Port, and PD6729 Pin Assignment Sheet 1PC Card ZV Port Pin PD6729S Comments PC Card ZV Port Pin PD6730 or PC Card, ZV Port, and PD6729 Pin Assignment Sheet 2PC Card, ZV Port, and PD6730/’6832 Pin Assignment Sheet 1 PC Card ZV Port Pin PD6729SPC Card, ZV Port, and PD6730/’6832 Pin Assignment Sheet 2 PD6832 CommentsPin Layout Guidelines

PD672X/30/32/33 specifications

The Intel PD672X family, which includes the PD6720, PD6723, PD6724, and PD6725, represents a significant advancement in the realm of integrated circuit technologies, specifically catering to the demands of embedded systems and personal computer applications during the early 1990s. These components were primarily designed to serve as peripherals, particularly focusing on providing enhanced serial communication capabilities.

One of the primary features of the PD672X series is its integration of multiple communication protocols, including both RS-232 and RS-422 standards. This versatility provides developers with the ability to utilize these chips in a wide range of applications, from basic data transfer to more complex networking tasks. The chips come equipped with flexible baud rate configurations, allowing users to adapt the communication speed to the requirements of their specific applications.

Another standout technology associated with the PD672X series is the incorporation of advanced interrupt handling and buffer management systems. This feature enhances data throughput by allowing incoming data to be stored temporarily in buffers, enabling the CPU to process information without being interrupted constantly. This is particularly beneficial in environments where time-sensitive data processing is critical, such as in industrial automation and real-time communication applications.

The PD672X series is also characterized by its compact design and low power consumption, making it suitable for portable devices and applications where space and energy efficiency are of paramount importance. These attributes allow manufacturers to incorporate the chips into a broader array of devices without significant constraints on size or battery life.

Moreover, the Intel PD672X family is notable for its compatibility with a variety of operating systems, ensuring that developers can leverage its capabilities across different platforms. This compatibility promotes wider adoption of the technology, as it can easily integrate into existing systems without the need for extensive modifications.

In conclusion, the Intel PD672X/30/32/33 series stands out for its robust communication capabilities, flexible configurations, efficient data handling, compact size, and system compatibility. These features collectively contribute to its enduring relevance in the embedded systems market, providing developers with a reliable solution for a multitude of applications that require effective serial communication.
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