PCI7421 datasheet(237/298 Pages) TI

Part #	PCI7421

Description	DUAL SINGLE SOCKET CARDBUS AND ILTRAMEDIA CONTROLLER WITH INTEGRATED 1304-A - CONTROLLER WITH DEDICATED FLASH MEDIA SOCKET

PDF	298 Pages

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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237 / 298 page

10−7

10.5 Power-Class Programming

The PC0–PC2 terminals are programmed to set the default value of the power-class indicated in the pwr field

(bits 21–23) of the transmitted self-ID packet. Table 10−9 shows the descriptions of the various power classes. The

default power-class value is loaded following a system (hardware) reset, but is overridden by any value subsequently

loaded into the Pwr_Class field in register 4.

Table 10−9. Power Class Descriptions

PC0–PC2

DESCRIPTION

000

Node does not need power and does not repeat power.

001

Node is self-powered and provides a minimum of 15 W to the bus.

010

Node is self-powered and provides a minimum of 30 W to the bus.

011

Node is self-powered and provides a minimum of 45 W to the bus.

100

Node may be powered from the bus and is using up to 3 W. No additional power is needed to enable the link.

101

Reserved

110

Node is powered from the bus and uses up to 3 W. An additional 3 W is needed to enable the link.

111

Node is powered from the bus and uses up to 3 W. An additional 7 W is needed to enable the link.

PCI7421 Datasheet(PDF) 237 Page - Texas Instruments