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

2021-2022

Microchip Technology Inc. and its subsidiaries DS50003155B

PAC194X/5X

UEFI BIOS Integration

and Microsoft® Windows® 10

and Windows 11

Energy Meter Interface Device Driver

User’s Guide

DS50003155B-page 2



2021-2022

Microchip Technology Inc. and its subsidiaries

This publication and the information herein may be used only

with Microchip products, including to design, test, and integrate

Microchip products with your application. Use of this informa-

tion in any other manner violates these terms. Information

regarding device applications is provided only for your conve-

nience and may be superseded by updates. It is your responsi-

bility to ensure that your application meets with your

specifications. Contact your local Microchip sales office for

additional support or, obtain additional support at https://

www.microchip.com/en-us/support/design-help/client-support-

services.

THIS INFORMATION IS PROVIDED BY MICROCHIP "AS IS".

MICROCHIP MAKES NO REPRESENTATIONS OR WAR-

RANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,

WRITTEN OR ORAL, STATUTORY OR OTHERWISE,

RELATED TO THE INFORMATION INCLUDING BUT NOT

LIMITED TO ANY IMPLIED WARRANTIES OF NON-

INFRINGEMENT, MERCHANTABILITY, AND FITNESS FOR A

PARTICULAR PURPOSE, OR WARRANTIES RELATED TO

ITS CONDITION, QUALITY, OR PERFORMANCE.

IN NO EVENT WILL MICROCHIP BE LIABLE FOR ANY INDI-

RECT, SPECIAL, PUNITIVE, INCIDENTAL, OR CONSE-

QUENTIAL LOSS, DAMAGE, COST, OR EXPENSE OF ANY

KIND WHATSOEVER RELATED TO THE INFORMATION OR

ITS USE, HOWEVER CAUSED, EVEN IF MICROCHIP HAS

BEEN ADVISED OF THE POSSIBILITY OR THE DAMAGES

ARE FORESEEABLE. TO THE FULLEST EXTENT

ALLOWED BY LAW, MICROCHIP'S TOTAL LIABILITY ON

ALL CLAIMS IN ANY WAY RELATED TO THE INFORMATION

OR ITS USE WILL NOT EXCEED THE AMOUNT OF FEES, IF

ANY, THAT YOU HAVE PAID DIRECTLY TO MICROCHIP

FOR THE INFORMATION.

Use of Microchip devices in life support and/or safety applica-

tions is entirely at the buyer's risk, and the buyer agrees to

defend, indemnify and hold harmless Microchip from any and

all damages, claims, suits, or expenses resulting from such

use. No licenses are conveyed, implicitly or otherwise, under

any Microchip intellectual property rights unless otherwise

stated.

Note the following details of the code protection feature on Microchip products:

• Microchip products meet the specifications contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and

under normal conditions.

• Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of

Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not

mean that we are guaranteeing the product is “unbreakable”. Code protection is constantly evolving. Microchip is committed to

continuously improving the code protection features of our products.

Trademarks

The Microchip name and logo, the Microchip logo, Adaptec,

AnyRate, AVR, AVR logo, AVR Freaks, BesTime, BitCloud,

CryptoMemory, CryptoRF, dsPIC, flexPWR, HELDO, IGLOO,

JukeBlox, KeeLoq, Kleer, LANCheck, LinkMD, maXStylus,

maXTouch, MediaLB, megaAVR, Microsemi, Microsemi logo,

MOST, MOST logo, MPLAB, OptoLyzer, PIC, picoPower,

PICSTART, PIC32 logo, PolarFire, Prochip Designer, QTouch,

SAM-BA, SenGenuity, SpyNIC, SST, SST Logo, SuperFlash,

Symmetricom, SyncServer, Tachyon, TimeSource, tinyAVR, UNI/O,

Vectron, and XMEGA are registered trademarks of Microchip

Technology Incorporated in the U.S.A. and other countries.

AgileSwitch, APT, ClockWorks, The Embedded Control Solutions

Company, EtherSynch, Flashtec, Hyper Speed Control, HyperLight

Load, IntelliMOS, Libero, motorBench, mTouch, Powermite 3,

Precision Edge, ProASIC, ProASIC Plus, ProASIC Plus logo, Quiet-

Wire, SmartFusion, SyncWorld, Temux, TimeCesium, TimeHub,

TimePictra, TimeProvider, TrueTime, WinPath, and ZL are

registered trademarks of Microchip Technology Incorporated in the

U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any

Capacitor, AnyIn, AnyOut, Augmented Switching, BlueSky,

BodyCom, CodeGuard, CryptoAuthentication, CryptoAutomotive,

CryptoCompanion, CryptoController, dsPICDEM, dsPICDEM.net,

Dynamic Average Matching, DAM, ECAN, Espresso T1S,

EtherGREEN, GridTime, IdealBridge, In-Circuit Serial

Programming, ICSP, INICnet, Intelligent Paralleling, Inter-Chip

Connectivity, JitterBlocker, Knob-on-Display, maxCrypto, maxView,

memBrain, Mindi, MiWi, MPASM, MPF, MPLAB Certified logo,

MPLIB, MPLINK, MultiTRAK, NetDetach, NVM Express, NVMe,

Omniscient Code Generation, PICDEM, PICDEM.net, PICkit,

PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE, Ripple

Blocker, RTAX, RTG4, SAM-ICE, Serial Quad I/O, simpleMAP,

SimpliPHY, SmartBuffer, SmartHLS, SMART-I.S., storClad, SQI,

SuperSwitcher, SuperSwitcher II, Switchtec, SynchroPHY, Total

Endurance, TSHARC, USBCheck, VariSense, VectorBlox, VeriPHY,

ViewSpan, WiperLock, XpressConnect, and ZENA are trademarks

of Microchip Technology Incorporated in the U.S.A. and other

countries.

SQTP is a service mark of Microchip Technology Incorporated in

the U.S.A.

The Adaptec logo, Frequency on Demand, Silicon Storage

Technology, Symmcom, and Trusted Time are registered

trademarks of Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany

II GmbH & Co. KG, a subsidiary of Microchip Technology Inc., in

other countries.

All other trademarks mentioned herein are property of their

respective companies.

ies.

ISBN: 978-1-5224-9459-1

For information regarding Microchip’s Quality Management Systems,

please visit www.microchip.com/quality.

PAC194X/5X

UEFI BIOS INTEGRATION AND

MICROSOFT® WINDOWS® 10

AND WINDOWS 11

DEVICE DRIVER USER’S GUIDE

 2021-2022

Microchip Technology Inc. and its subsidiaries

DS50003155B-page 3

Table of Contents

Preface ........................................................................................................................... 5

Introduction............................................................................................................ 5

Document Layout .................................................................................................. 5

Conventions Used in this Guide ............................................................................ 7

Recommended Reading........................................................................................ 8

The Microchip Web Site ........................................................................................ 8

Product Change Notification Service..................................................................... 8

Customer Support ................................................................................................. 8

Document Revision History ................................................................................... 9

Chapter 1. Product Overview

Chapter 2. Hardware Integration

2.1 I2C Bus Controller Windows Support ........................................................... 13

2.2 PAC194X/5X VDD, PWRDN, SLOW/ALERT1 and GPIO/ALERT2 Pin Connec-

tions ........................................................................................................ 13

2.3 Channel Sense Resistor (RSENSE) ............................................................ 15

2.4 Channel Polarity and Scale Range .............................................................. 15

2.5 PAC194X/5X-2 Connection Considerations ................................................. 16

Chapter 3. ACPI BIOS Integration

3.1 PAC194X/5X ACPI Device ........................................................................... 17

Chapter 4. Driver Installation

4.1 Prerequisites ................................................................................................ 23

4.2 Installation Instructions ................................................................................. 24

Chapter 5. Device Instantiation and Initialization

5.1 Getting Started ............................................................................................. 25

5.2 Device Configuration .................................................................................... 26

Chapter 6. PAC194X/5X Device Driver Interfaces

6.1 Introduction ................................................................................................... 29

6.2 Energy Meter Interface ................................................................................. 29

6.3 Device Control Interface ............................................................................... 31

Chapter 7. PAC194X/5X Driver Characteristics

7.1 Introduction ................................................................................................... 45

7.2 Multiple I/O Requests ................................................................................... 45

7.3 Energy Meter Interfaces (EMI) vs. Device Control Interfaces ...................... 45

7.4 Software Accumulators ................................................................................ 46

7.5 Low-Power Mode and Power States ............................................................ 46

Product specificaties

Merk:	Microchip
Categorie:	Niet gecategoriseerd
Model:	PAC194X/5X

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