| Publisher | Microsoft | ||
|---|---|---|---|
| Format | HTML | Date added | 14 Aug 2003 |
| Topics | PCMCIA Cards, Windows 3.1 - 95 - 98 - Me | ||
| Downloads | 88 | ||
This article provides information to help designers understand how Microsoft Windows applies voltage to a PC Card device. By following the guidelines presented in this article, PC Card vendors can avoid shipping devices that fail to configure and operate in certain socket controllers. With the advent of support for 3.3V cards in CardBus controllers, some vendors are designing their legacy R2 ISA-based PC Card cards to use only 3.3V. However, R2 cards that support 3.3V-only cards will fail when inserted into older PCMCIA Interface Controller (PCIC) socket controllers. Because there is no standard method in PCIC controllers for determining the voltage requirements of a card, Windows requires that R2 cards which use 3.3V also support 5V. With a properly designed R2 card, Windows will initially power up the card with 5V and read the CIS tuples. If the CIS tuples allow for 3.3V operation and if the version of Windows being used understands how to apply 3.3V through that specific socket controller, then Windows will switch the card to 3.3V mode.
Did you find this white paper useful?
23 out of 50 users found this white paper useful
Related white papers
Testing Wireless PC Cards
This document outlines a suggested procedure for testing the performance of competitive wireless PC cards. There are several factors to consider when testing wireless PC cards, these includes performance, design,...
Remote Operating System Installation
For computers in your organization that do not contain a PXE-based remote boot ROM, Microsoft provides the administrator with a tool to create a remote boot disk for use with...
Navigating the Printer Landscape
Despite the digitization of everything, paper and printing are essential to business operations. In this ZDNet Videocast, we provide guidelines for choosing the printing solutions that best meets the needs of...
Wires Give Way to Wireless at a North Carolina Hospital
Wake Forest University Baptist Medical Center is no stranger to technology, the project committee raised a number of concerns about the proposed wireless solution, including screen resolution and the potential...
Power Management of USB Host Controllers
This paper provides information about power capabilities of USB 2.0 host controllers. It outlines the procedure for defining capabilities and explains interpretation of these capabilities by the USB host controller...
PCI Card Placement Rules for the IBM eServer iSeries Server
The implementation of Peripheral Component Interconnect (PCI) architecture provides flexibility in the placement of input/output processors (IOPs) and input/output adapters (IOAs) in iSeries 270, 800, 810, 820, 825, 840, 840,...
Flash Memory Card Installation Instructions
This paper describes installation and configuration procedures for Flash memory cards, which ship as spare parts (=), and are used with the Route Switch Processors (RSPs). The Flash memory card...
