Avalue Technology ECM-EHL3 User manual

Part No. E2047395200R
ECM-EHL3
Intel® Elkhart Lake 3.5” Micro Module
User’s Manual
1st Ed –15 September 2022

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FCC Statement
THIS DEVICE COMPLIES WITH PART 15 FCC RULES. OPERATION IS
SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE.
(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS
FOR A CLASS "A" DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES.
THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST
HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A
COMMERCIAL ENVIRONMENT. THIS EQUIPMENT GENERATES, USES, AND CAN
RADIATE RADIO FREQUENCY ENERGY AND, IF NOT INSTALLED AND USED IN
ACCORDANCE WITH THE INSTRUCTION MANUAL, MAY CAUSE HARMFUL
INTERFERENCE TO RADIO COMMUNICATIONS.
OPERATION OF THIS EQUIPMENT IN A RESIDENTIAL AREA IS LIKELY TO CAUSE
HARMFUL INTERFERENCE IN WHICH CASE THE USER WILL BE REQUIRED TO
CORRECT THE INTERFERENCE AT HIS OWN EXPENSE.
Notice
This guide is designed for experienced users to setup the system within the shortest time.
For detailed information, please always refer to the electronic user's manual.
Copyright Notice
Copyright 2022 Avalue Technology Inc., ALL RIGHTS RESERVED.
No part of this document may be reproduced, copied, translated, or transmitted in any form
or by any means, electronic or mechanical, for any purpose, without the prior written
permission of the original manufacturer.
Trademark Acknowledgement
Brand and product names are trademarks or registered trademarks of their respective
owners.
Disclaimer
Avalue Technology Inc. reserves the right to make changes, without notice, to any product,
including circuits and/or software described or contained in this manual in order to improve
design and/or performance. Avalue Technology assumes no responsibility or liability for the
use of the described product(s), conveys no license or title under any patent, copyright, or
masks work rights to these products, and makes no representations or warranties that

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these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified. Applications that are described in this manual are for illustration
purposes only. Avalue Technology Inc. makes no representation or warranty that such
application will be suitable for the specified use without further testing or modification.
Life Support Policy
Avalue Technology’s PRODUCTS ARE NOT FOR USE AS CRITICAL COMPONENTS IN
LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE PRIOR WRITTEN APPROVAL
OF Avalue Technology Inc.
As used herein:
1. Life support devices or systems are devices or systems which, (a) are intended for
surgical implant into body, or (b) support or sustain life and whose failure to perform,
when properly used in accordance with instructions for use provided in the labeling, can
be reasonably expected to result in significant injury to the user.
2. A critical component is any component of a life support device or system whose
failure to perform can be reasonably expected to cause the failure of the life
support device or system, or to affect its safety or effectiveness.
A Message to the Customer
Avalue Customer Services
Each and every Avalue’s product is built to the most exacting specifications to ensure
reliable performance in the harsh and demanding conditions typical of industrial
environments. Whether your new Avalue device is destined for the laboratory or the factory
floor, you can be assured that your product will provide the reliability and ease of operation
for which the name Avalue has come to be known.
Your satisfaction is our primary concern. Here is a guide to Avalue’s customer services. To
ensure you get the full benefit of our services, please follow the instructions below carefully.
Technical Support
We want you to get the maximum performance from your products. So if you run into
technical difficulties, we are here to help. For the most frequently asked questions, you can
easily find answers in your product documentation. These answers are normally a lot more
detailed than the ones we can give over the phone. So please consult the user’s manual
first.
To receive the latest version of the user’s manual; please visit our Web site at:
http://www.avalue.com.tw/

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Product Warranty
Avalue warrants to you, the original purchaser, that each of its products will be free from
defects in materials and workmanship for two years from the date of purchase.
This warranty does not apply to any products which have been repaired or altered by
persons other than repair personnel authorized by Avalue, or which have been subject to
misuse, abuse, accident or improper installation. Avalue assumes no liability under the
terms of this warranty as a consequence of such events. Because of Avalue’s high
quality-control standards and rigorous testing, most of our customers never need to use our
repair service. If any of Avalue’s products is defective, it will be repaired or replaced at no
charge during the warranty period. For out-of-warranty repairs, you will be billed according
to the cost of replacement materials, service time, and freight. Please consult your dealer
for more details. If you think you have a defective product, follow these steps:
1. Collect all the information about the problem encountered. (For example,
CPU type and speed, Avalue’s products model name, hardware & BIOS
revision number, other hardware and software used, etc.) Note anything
abnormal and list any on-screen messages you get when the problem occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information available.
3. If your product is diagnosed as defective, obtain an RMA (return material
authorization) number from your dealer. This allows us to process your good
return more quickly.
4. Carefully pack the defective product, a complete Repair and Replacement
Order Card and a photocopy proof of purchase date (such as your sales
receipt) in a shippable container. A product returned without proof of the
purchase date is not eligible for warranty service.
5. Write the RMA number visibly on the outside of the package and ship it
prepaid to your dealer.

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Content
1. Getting Started............................................................................................................8
1.1 Safety Precautions....................................................................................................8
1.2 Packing List...............................................................................................................8
1.3 Document Amendment History .................................................................................9
1.4 Manual Objectives...................................................................................................10
1.5 System Specifications.............................................................................................11
1.6 Architecture Overview—Block Diagram..................................................................15
2. Hardware Configuration...........................................................................................16
2.1 Product Overview....................................................................................................17
2.2 Jumper and Connector List.....................................................................................18
2.3 Setting Jumpers & Connectors ...............................................................................20
2.3.1 eDP/LVDS mode selector (JEDPSW1).......................................................................................... 20
2.3.2 Clear CMOS (JRTC1) .................................................................................................................... 20
2.3.3 AT/ATX Input power select (JAT1)................................................................................................. 21
2.3.4 LCD inverter connector (BKL1)...................................................................................................... 21
2.3.5 Serial port 1 connector (JCOM1) ................................................................................................... 22
2.3.6 Serial port 2 connector (JCOM2) ................................................................................................... 22
2.3.7 Serial port 3/4/5/6 connector (JCOM3) .......................................................................................... 23
2.3.8 General purpose I/O connector (JDIO1) ........................................................................................ 24
2.3.9 SATA Power connector (SATA_PWR1)......................................................................................... 24
2.3.10 USB2.0 connector (JUSB1)....................................................................................................... 25
2.3.11 USB2.0 connector (JUSB2)....................................................................................................... 25
2.3.12 BIOS SPI connector (BIOS_SPI1)............................................................................................. 26
2.3.13 Battery connector (BAT1) .......................................................................................................... 26
2.3.14 Front Panel connector (JFP1).................................................................................................... 27
2.3.15 PC Buzzer connector (JBZ1)..................................................................................................... 27
2.3.16 EC Debug eSPI connector (JESPI1) ......................................................................................... 28
2.3.17 Audio connector (JAUDIO1) ...................................................................................................... 28
2.3.17.1 Signal Description –Audio connector (JAUDIO1)................................................................. 28
2.3.18 LVDS connector (LVDS1).......................................................................................................... 29
2.3.19 AMP connector (JAMP1) ........................................................................................................... 30
2.3.20 SIM card slot (NSIM2)................................................................................................................ 30
2.3.21 EDP connector (EDP1).............................................................................................................. 31
3.BIOS Setup....................................................................................................................32
3.1 Introduction .............................................................................................................33
3.2 Starting Setup .........................................................................................................33

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3.3 Using Setup ............................................................................................................34
3.4 Getting Help............................................................................................................35
3.5 In Case of Problems................................................................................................35
3.6BIOS setup..............................................................................................................36
3.6.1 Main Menu...................................................................................................................................... 36
3.6.1.1 System Language.................................................................................................................. 37
3.6.1.2 System Date.......................................................................................................................... 37
3.6.1.3 System Time.......................................................................................................................... 37
3.6.2 Advanced Menu ............................................................................................................................. 37
3.6.2.1 CPU Configuration................................................................................................................. 38
3.6.2.2 Power & Performance ........................................................................................................... 39
3.6.2.2.1 CPU –Power Management Control...................................................................................... 39
3.6.2.2.2 GT –Power Management Control......................................................................................... 41
3.6.2.3 PCH-FW Configuration.......................................................................................................... 42
3.6.2.3.1 Firmware Update Configuration............................................................................................. 42
3.6.2.3.2 PTT Configuration.................................................................................................................. 43
3.6.2.4 Trusted Computing................................................................................................................ 43
3.6.2.5 APCI Settings ........................................................................................................................ 44
3.6.2.6 IT5571 Super IO Configuration.............................................................................................. 45
3.6.2.6.1 Serial Port 1 Configuration .................................................................................................... 46
3.6.2.6.2 Serial Port 2 Configuration .................................................................................................... 47
3.6.2.7 HW Monitor............................................................................................................................ 48
3.6.2.8 NCT5124DSEC Super IO Configuration ............................................................................... 48
3.6.2.8.1 Serial Port 3 Configuration .................................................................................................... 49
3.6.2.8.2 Serial Port 4 Configuration .................................................................................................... 49
3.6.2.8.3 Serial Port 5 Configuration .................................................................................................... 50
3.6.2.8.4 Serial Port 6 Configuration .................................................................................................... 50
3.6.2.9 S5 RTC Wake Settings.......................................................................................................... 51
3.6.2.10 Serial Port Console Redirection ............................................................................................ 52
3.6.2.11 USB Configuration................................................................................................................. 52
3.6.2.12 Network Stack Configuration................................................................................................. 53
3.6.2.13 NVMe Configuration .............................................................................................................. 54
3.6.3 Chipset.......................................................................................................................................... 54
3.6.3.1 System Agent (SA) Configuration.......................................................................................... 55
3.6.3.1.1 Memory Configuration ........................................................................................................... 55
3.6.3.1.2 Graphics Configuration.......................................................................................................... 56
3.6.3.2 PCH-IO Configuration............................................................................................................ 57
3.6.3.2.1 PCI Express Configuration.................................................................................................... 57
3.6.3.2.2 SATA Configuration............................................................................................................... 64
3.6.3.2.3 USB Configuration................................................................................................................. 65

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3.6.3.2.4 HD Audio Configuration......................................................................................................... 66
3.6.3.3 Board & Panel Configuration................................................................................................. 66
3.6.4 Security......................................................................................................................................... 68
3.6.4.1 Secure Boot........................................................................................................................... 69
3.6.4.1.1 Key Management..................................................................................................................... 70
3.6.5 Boot .............................................................................................................................................. 70
3.6.6 Save and exit................................................................................................................................ 71
3.6.6.1 Save Changes and Exit......................................................................................................... 72
3.6.6.2 Discard Changes and Reset.................................................................................................. 72
3.6.6.3 Restore Defaults.................................................................................................................... 72
3.6.6.4 Restore User Defaults ........................................................................................................... 72
4. Drivers Installation.......................................................................................................73
4.1 Install Chipset Driver...............................................................................................74
4.2 Install ME Driver......................................................................................................75
4.3 Install VGA Driver....................................................................................................76
4.4 Install Audio Driver..................................................................................................78
4.5 Install Ethernet Driver..............................................................................................79
4.6 Install HID Driver.....................................................................................................81
5. Mechanical Drawing ....................................................................................................82

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1. Getting Started
1.1 Safety Precautions
Warning!
Always completely disconnect the power cord from your
chassis whenever you work with the hardware. Do not
make connections while the power is on. Sensitive
electronic components can be damaged by sudden power
surges. Only experienced electronics personnel should
open the PC chassis.
Caution!
Always ground yourself to remove any static charge before
touching the CPU card. Modern electronic devices are very
sensitive to static electric charges. As a safety precaution,
use a grounding wrist strap at all times. Place all electronic
components in a static-dissipative surface or static-shielded
bag when they are not in the chassis.
1.2 Packing List
Before you begin installing your single board, please make sure that the
following materials have been shipped:
1 x 3.5” ECM-EHL3 Micro Module
1 x CPU Heatsink
1 x Cable set contains the followings:
—1 x Serial ATA cable (7-pin, standard)
—1 x Wire SATA power cable (15-pin,2P/2.0mm)
—1 x Flat cable 9P(M)-PHD 10P/2.0mm)
3M foam (VHB-4622 10mm*20mm*1.1mm)
1 x M.2 Module mounting bracket screw set

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1.3 Document Amendment History
Revision
Date
By
Comment
1st
September 2022
Avalue
Initial Release

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1.4 Manual Objectives
This manual describes in details Avalue Technology ECM-EHL3 Single Board.
We have tried to include as much information as possible but we have not duplicated
information that is provided in the standard IBM Technical References, unless it proved to
be necessary to aid in the understanding of this board.
We strongly recommend that you study this manual carefully before attempting to set up
ECM-EHL3 or change the standard configurations. Whilst all the necessary information is
available in this manual we would recommend that unless you are confident, you contact
your supplier for guidance.
Please be aware that it is possible to create configurations within the CMOS RAM that
make booting impossible. If this should happen, clear the CMOS settings, (see the
description of the Jumper Settings for details).
If you have any suggestions or find any errors regarding this manual and want to inform us
of these, please contact our Customer Service department with the relevant details.

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1.5 System Specifications
System
CPU
Onboard Intel® Pentium®/Celeron®/Atom™ SoC BGA Processor (Elkhart Lake
Platform 4.5~12W)- (with CPU Bottom Mounted)
BIOS
AMI uEFI BIOS, 256Mbit SPI Flash ROM
(Winbond W25R256JVEIQ)
I/O Chip
EC ITE IT5571
Memory
One 260-pin DDR4 3200 MHz SO-DIMM socket, supports up to 32GB Max
Watchdog Timer
H/W Reset, 1sec. –65535sec./min.1sec. or 1min. step
H/W Status
Monitor
CPU temperature monitoring
Voltages monitoring
CPU fan speed control
TPM
Onboard NuvoTon NPCT754AADYX support TPM 2.0, co-lay Infineon SLB 9670
Expansion
M.2
1 x M.2 Type M support 2260/2242 (with 1 x PCI-e x2 signal) , standard package
with 60 to 42 bracket + screw set
1 x M.2 Type B 3042/2242 (with SATA and USB3.0/USB2.0, with 1 x SIM card slot,
support WWAN+GNSS or SSD) standard package with 52 to 42 bracket + screw
set.
* Only supports one SIM card (co-lay 1 x 10pin FPC connector for uSIM card
adapter)
* Does not support I2S and PCM functions
1 x M.2 Type E 2230 support WiFi module (1 x PCI-e x 1 & USB2.0 Signal)
* Does not support PCM/I2S and UART functions
Storage
M.2
1 x M.2 Type M support 2260/2242 (with 1 x PCI-e x2 signal) , standard package
with 60 to 42 bracket + screw set
1 x M.2 Type B 3042/2242 (with SATA and USB3.0/USB2.0, with 1 x SIM card slot,
support WWAN+GNSS or SSD) standard package with 52 to 42 bracket + screw
set.
SATA
1 x SATA III
Edge I/O
LAN
1 x Intel® I226LM 2.5 Gigabit Ethernet (LAN1)
2 x Intel® I210AT (Co-lay I210IT/I211AT) Gigabit Ethernet (LAN2,3)
USB 2.0
Double deck USB2.0 Type A
USB 3.1
2 x USB3.2 GEN2 x1
DP
2 x DP++

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DC Input
Screw type DC Jack
(co-lay with Phoenix connector)
LED Indicator
Power LED /HDD LED at IO
Onboard I/O
COM
COM 1 & COM2:
- COM 1 & COM2 support RS232/422/485 connector
RS422/485 by BIOS setting.
- 2 x 2 x 5 pin, pitch 2.00mm connector support RS-232/422/485 connector
COM3 to 6:
- 1 x 2 x 20 pin, pitch 2.00mm connector for COM3~6: support RS-232 connector
USB 2.0
2 x 2 x 5 pin, pitch 2.00mm connector (or pin header) for 4 USB2.0
GPIO
1 x 2 x 6 pin, pitch 2.00mm connector for GPIO
SATA Power
1 x SATA Power, pitch 2.00mm connector, must support 3.5”HDD
Buzzer
1 x buzzer connector
Front Panel
1 x 2 x 5 pin, pitch 2.00mm connector for front panel
RTC Battery
1 x 2 Pin Pitch 1.25mm horizontal type battery connector (CR2032 Battery)
AT/ATX Selector
1 x 1 x 3 pin pitch 2.00mm connector for AT/ATX jumper
Clear CMOS
1 x 1 x 3 pin pitch 2.00mm connector
LVDS
1 x 2 x 20 pin, pitch 1.25mm connector for LVDS
LCD Backlight
Brightness
1 x 1 x 5 pin, pitch 2.00mm connector for LCD Backlight Brightness
LCD Inverter
1 x 1 x 5 pin, pitch 2.00mm Wafer connector for LCD inverter backlight (5V/12V)
eDP
1 x 1 x 40 pin, pitch 0.5mm IPEX connector for eDP
BIOS SPI
1 x 2 x 4 pin, pitch 1.00mm connector for BIOS SPI
EC Debug /eSPI
1 x 2 x 6 pin, pitch 1.00mm for EC Debug eSPI
Audio
1 x 2 x 6 pin, pitch 2.00mm connector for front Audio
Power Input
Connector
Screw type DC Jack co-lay Phoenix connector.
Amp Connector
1 x 4 pin, pitch 2.00mm header for 3W x 2 Speaker
Display
Graphic Chipset
Intel® UHD Graphics for 10th Gen Intel® Processors
Spec. &
Resolution
2 x DP++: max 4096 x 2160@60 Hz
LVDS: 1920 x 1080 Dual channel 18/24-bits LVDS (Chrontel CH7511B-BFI eDP to
LVDS)
1 x eDP 4096 x 2160@60 Hz share with LVDS by switch IC
Multiple Display
Triple Display
2x DP++, 1 x 2CH LVDS/eDP(default LVDS)
Audio
Audio Codec
Realtek ALC888s co lay ALC897

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Amplifier
ALC105 4Ω/3W per channel Amplifier
Ethernet
LAN Chip
1 x Intel® I226LM 2.5 Gigabit Ethernet
2 x Intel® I210AT (Co-lay I210IT/I211AT) Gigabit Ethernet
LAN Spec.
1 x 2.5G Gigabit Ethernet
2 x 10/100/1000 Base-Tx GbE compatible
Mechanical &
Environmental
Power
Requirement
DC in +9V ~ +36V
ACPI
Single power ATX Support S0, S3, S4, S5
ACPI 6.1 Compliant
Power Mode
AT / ATX mode Switchable Through Jumper
Operating Temp.
0~60°C (32~140°F) with 0.5m/s air flow.
Storage Temp.
-40~ +75°C
Operating
Humidity
40°C @ 95% Relative Humidity, Non-condensing
Size (L x W)
5.7" x 4" (146mm x 101mm)
Weight
0.40kg
Vibration Test
Package Vibration Test
Reference IEC60068-2-64 Testing procedures
Test Fh: Vibration broadband random Test
1. PSD: 0.026G²/Hz, 2.16 Grms
2. Non-operation mode
3. Test Frequency: 5-500Hz
4. Test Axis: X,Y and Z axis
5. 30 min. per each axis
6. IEC 60068-2-64 Test:Fh
Random Vibration Operation
Reference IEC60068-2-64 Testing procedures
Test Fh : Vibration broadband random Test
1. PSD: 0.00454G²/Hz, 1.5 Grms
2. Operation mode
3. Test Frequency : 5-500Hz
4. Test Axis : X,Y and Z axis
5. 30 minutes per each axis
6. IEC 60068-2-64 Test:Fh
Random Vibration Non Operation

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Reference IEC60068-2-64 Testing procedures
Test Fh : Vibration broadband random Test
1. PSD: 0.01818G²/Hz, 3.0 Grms
2. Non Operation mode
3. Test Frequency : 5-500Hz
4. Test Axis : X,Y and Z axis
5. 30 minutes per each axis
6. IEC 60068-2-64 Test:Fh
Drop Test
Packing Drop
Reference ISTA 2A, Method : IEC-60068-2-32 Test: Ed
Drop Test
1 One corner , three edges, six faces
2 ISTA 2A, IEC-60068-2-32 Test:Ed
OS Support
Win10 64bit, Linux
Note: Specifications are subject to change without notice.
User condition suggestion:
1. NSIM1 and NSIM2 can’t be using at the same time, user need to choose either one.

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1.6 Architecture Overview—Block Diagram
The following block diagram shows the architecture and main components of ECM-EHL3

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2. Hardware
Configuration

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2.1 Product Overview

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2.2 Jumper and Connector List
You can configure your board to match the needs of your application by setting jumpers. A
jumper is the simplest kind of electric switch.
It consists of two metal pins and a small metal clip (often protected by a plastic cover) that
slides over the pins to connect them. To “close” a jumper you connect the pins with the clip.
To “open” a jumper you remove the clip. Sometimes a jumper will have three pins, labeled 1,
2, and 3. In this case, you would connect either two pins.
The jumper settings are schematically depicted in this manual as follows:
A pair of needle-nose pliers may be helpful when working with jumpers.
Connectors on the board are linked to external devices such as hard disk drives, a
keyboard, or floppy drives. In addition, the board has a number of jumpers that allow you to
configure your system to suit your application.
If you have any doubts about the best hardware configuration for your application, contact
your local distributor or sales representative before you make any changes.
The following tables list the function of each of the board’s jumpers and connectors.
Jumpers
Label
Function
Note
JEDPSW1
eDP/LVDS mode selector
3 x 1 header, pitch 2.00mm
JAT1
AT/ATX Input power select
3 x 1 header, pitch 2.00mm
JRTC1
Clear CMOS
3 x 1 header, pitch 2.00mm
Connectors
Label
Function
Note
BKL1
LCD inverter connector
5 x 1 wafer, pitch 2.00mm
Matching Connector: JST PHR-5
JCOM1
Serial Port 1 connector
5 x 2 header, pitch 2.00mm
JCOM2
Serial Port 2 connector
5 x 2 header, pitch 2.00mm
JCOM3
Serial Port 3/4/5/6 connector
20 x 2 header, pitch 2.00mm
JDIO1
General purpose I/O connector
6 x 2 header, pitch 2.00mm

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NGFFB1
M.2 KEY-B 3042/2242 connector
NGFFE2
M.2 KEY-E 2230 connector
NGFFM2
M.2 KEY-M 2260/2242 connector
LED1
HDD/Power LED indicator
JFP1
Front Panel connector
5 x 2 header, pitch 2.00mm
USB21
2 x USB2.0 connector
USB31
2 x USB3.2 connector
JUSB1
USB2.0 connector
5 x 2 header, pitch 2.00mm
JUSB2
USB2.0 connector
5 x 2 header, pitch 2.00mm
JBZ1
PC Buzzer connector
2 x 1 wafer, pitch 2.00mm
LAN1
2 x RJ-45 Ethernet
LAN2
RJ-45 Ethernet
BAT1
Battery connector
2 x 1 wafer, pitch 1.25mm
JAUDIO1
Audio connector
6 x 2 header, pitch 2.00mm
PWR1
Power connector
BIOS_SPI1
BIOS SPI connector
5 x 2 header, pitch 1.00mm
LVDS1
LVDS connector
DIN 40-pin wafer, pitch 1.25mm
Matching Connector: Hirose
DF13-40DS-1.25C
SATA_PWR1
SATA Power connector
2 x 1 wafer, pitch 2.00mm
SATA1
Serial ATA connector
DP1
DP connector
DP2
DP connector
SO_DIMM1
DDR4 SODIMM socket
JAMP1
AMP connector
4 x 1 header, pitch 2.00mm
JESPI1
EC Debug eSPI connector
6 x 2 wafer, pitch 1.00mm
NSIM1
SIM card slot
NSIM2
SIM card slot
10 x 1 FPC, pitch 0.50 mm
EDP1
EDP connector
40 x 1 wafer, pitch 0.50mm

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2.3 Setting Jumpers & Connectors
2.3.1 eDP/LVDS mode selector (JEDPSW1)
* Default
eDP*
LVDS
2.3.2 Clear CMOS (JRTC1)
* Default
Normal*
Clear CMOS