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IMB540 User’s manual

Introduction

1.1

Features

⚫

LGA1700 socket 12th Generation Intel® Core

™ i9 / i7/ i5/ i3/ Pentium®, Celeron®

processors (Alder lake S) up to 125W

⚫

4 x 288-pin

DDR4-3200 ECC/non-ECC un-buffered Long-DIMM with maximum memory

capacity up to 128GB (max. 32GB per slot)

⚫

DVI-D, HDMI, Disp+ and VGA with four-view support

⚫

4 x SATA-600 w/ RAID 0/1/5/10

⚫

4 x USB3.2 Gen2x1 (10Gbps), 2 x Dual USB 3.2 Gen1x1(5Gbps) and 4 x USB 2.0 ports
and 1 x USB 2.0 with 180D type A

1.2

Specifications

⚫

CPU

⚫

LGA1700 Socket 12th Generation Intel

Core

™ i9 / i7/ i5/ i3/ Pentium®, Celeron®

processors (Alder lake S) up to 125W

Model

Core

Therad

TDP

i9-12900K

125W

i9-12900E

65W

i9-12900TE

35W

i7-12700E

65W

i7-12700TE

35W

i5-12500E

65W

i5-12500TE

35W

i3-12100E

60W

i3-12100TE

35W

G6900E

46W

G6900TE

35W

⚫

Chipset

◼

Intel

R680E

⚫

BIOS

◼

AMI BIOS

⚫

System Memory

◼

4 x 288-pin ECC/non-ECC un-buffered Long-DIMM sockets

◼

Maximum 128GB DDR4 memory (max. 32GB per slot)

◼

Supports DDR4-3200Mhz

⚫

Onboard Multi I/O

◼

1 x PS/2 keyboard (internal box headers)

◼

1 x PS/2 mouse (internal box headers)

◼

1 x SMBus

◼

Four serial ports:
- 4 x RS-232 (internal box headers).
- 2 x RS-232/422/485 (rear I/O)

Содержание IMB540

Страница 1: ...IMB540 Intel Socket 1700 CoreTM i9 i7 i5 i3 Pentium Celeron and Xeon E Processors ATX Industrial Motherboard User s Manual ...

Страница 2: ...tion in this manual Axiomtek reserves the right to change or revise this document and or product at any time without notice No part of this document may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written permission of Axiomtek Co Ltd CAUTION Wrong type of batteries may cause explo...

Страница 3: ...system unit chassis for a few seconds To discharge static electricity from your body Wear a grounding wrist strap available from most electronic component stores when handling boards and components Trademarks Acknowledgments Axiomtek is a trademark of Axiomtek Co Ltd Intel and Celeron are trademarks of Intel Corporation Windows is a trademark of Microsoft Corporation AMI is a trademark of American...

Страница 4: ...CN6 12 2 3 9 GPIO Header CN7 13 2 3 10 Internal Keyboard Connector CN8 13 2 3 11 Internal Mouse Connector CN9 13 2 3 12 M 2 2280 Key M NVMe SSD CN10 14 2 3 13 SMBus Header CN12 14 2 3 14 Internal USB Headers CN13 CN15 15 2 3 15 PCI Express Mini Card Connector CN16 15 2 3 16 TPM Pin Header CN19 16 2 3 17 Front Panel Header CN17 16 2 3 18 Power Input Connectors ATX1 and CN18 17 2 3 19 Internal USB 3...

Страница 5: ...5 Chipset Menu 39 4 6 Security Menu 47 4 7 Boot Menu 48 4 8 Save Exit Menu 49 Appendix A TPM Module Installation 51 Appendix B iAMT Settings 55 Entering Management Engine BIOS Extension MEBx 55 Set and Change Password 55 iAMT Settings 56 iAMT Web Console 58 Appendix C Digital I O 61 Digital I O Software Programming 61 ...

Страница 6: ...vi This page is intentionally left blank ...

Страница 7: ...ings and vehicles With its built in Intel HD Graphics GFX this industrial grade motherboard delivers superb 3D visual performance and supports triple display through DisplayPort DVI D HDMI and VGA ports to meet professional grade CAD and media entertainment needs In addition the IMB540 supports Intel Turbo Boost 2 0 technology Intel Hyper Threading technology Intel UHD Graphics with DX12 128GB DDR...

Страница 8: ... LGA1700 Socket 12th Generation Intel Core i9 i7 i5 i3 Pentium Celeron processors Alder lake S up to 125W Model Core Therad TDP i9 12900K 16 24 125W i9 12900E 16 24 65W i9 12900TE 16 24 35W i7 12700E 12 20 65W i7 12700TE 12 20 35W i5 12500E 6 12 65W i5 12500TE 6 12 35W i3 12100E 4 8 60W i3 12100TE 4 8 35W G6900E 2 2 46W G6900TE 2 2 35W Chipset Intel R680E BIOS AMI BIOS System Memory 4 x 288 pin EC...

Страница 9: ...DA Codec Supports MIC in line in line out Display 1 x 15 pin D Sub as VGA connector Resolution max up to 1920x1200 60Hz 1 x HDMI 1 4b with max resolution up to 4096x2160 24Hz 1 x Displayport DP 1 2 with max resolution up to 4096 x 2304 60Hz 1 x DVI D with resolution max up to 1920 1200 60Hz Expansion Interface 2 x PCIe x16 slot signal x16 x0 or x8 x8 2 x PCIe x4 slot open ended PCIe 2 3 1 x PCIe x...

Страница 10: ...IMB540 User s manual 4 Introduction 1 3 Packing list Bulk packing 1 x Motherboard 1 x I O bracket Gift box 1 x Motherboard 1 x I O bracket ...

Страница 11: ...IMB540 User s manual Board and Pin Assignments 5 Section 2 Board and Pin Assignments 2 1 Board Layout Top side ...

Страница 12: ...IMB540 User s manual 6 Board and Pin Assignments 2 2 Block Diagram ...

Страница 13: ...plying power to the IMB540 series motherboard make sure all of the jumpers are in factory default position Below you can find a summary table of all jumpers and onboard default settings Jumper Description Setting JP1 PCIe x16 slot Default x16 1 2 Close JP3 AT ATX Power Mode Select Default AT Mode 1 2 Close Note To identify the first pin of a header or jumper please refer to the following informati...

Страница 14: ... AT ATX Mode Select JP3 This 3x1 pin p 2 54mm jumper allows you to select AT or ATX power mode 2 3 3 Clear CMOS SW1 Pressing the tact switch can restore BIOS optimal defaults The button is next to the Front Panel Header connector CN14 JP1 PCIe 1 x16 PCIe 4 x0 1 2 Default PCIe 1 x8 PCIe 4 x8 2 3 Function Setting AT mode Default 1 2 close ATX mode 2 3 close ...

Страница 15: ...s Connector CN6 2 5 GbE RJ45 iAMT USB3 2 Gen2x1 10Gbps Connector CN7 DIO Connector CN8 Internal PS 2 KB Connector CN9 Internal PS 2 MS Connector CN10 M 2 Connector CN13 CN15 Internal USB2 0 Headers CN16 PCI Express Mini Card CN17 Front Panel Header CN18 24 pin Power Input Connector CN19 TPM 2 0 Connector Optional CN20 CN21 Internal USB3 2 Gen1 5Gbps Connector ATX1 CPU Power Input Connector COM3 CO...

Страница 16: ...connector for DisplayPort CN2A and a lower connector for HDMI CN2B Pin RS 232 RS 422 RS 485 1 DCD TX 485 2 RXD TX 485 3 TXD RX N C 4 DTR RX N C 5 GND GND GND 6 DSR N C N C 7 RTS N C N C 8 CTS N C N C 9 RI N C N C Pin Signal Pin Signal 1 LANE 0 21 DATA2 2 GND 22 GND 3 LANE 0 23 DATA2 4 LANE 1 24 DATA1 5 GND 25 GND 6 LANE 1 26 DATA1 7 LANE 2 27 DATA0 8 GND 28 GND 9 LANE 2 29 DATA1 10 LANE 3 30 Clock...

Страница 17: ...15 pin D Sub connector is commonly used for VGA display 2 3 7 Audio Jack CN4 Install an audio driver and then attach audio devices to CN4 Pin Signal Pin Signal 1 TX2 2 TX2 3 Ground 4 NC 5 NC 6 DVI_SPD_CLK 7 DVI_SPD DATA 8 NC 9 TX1 10 TX1 11 Ground 12 NC 13 NC 14 VGAVCC 15 Ground 16 HPDETECT 17 TX0 18 TX0 19 Ground 20 NC 21 NC 22 Ground 23 TXC 24 TXC Pin Signal Pin Signal 1 Red 2 Green 3 Blue 4 NC ...

Страница 18: ...te GbE Speed LED turns orange for 1000Mbps or green for 100Mbps The light is off for 10Mbps 2 5GbE Speed LED turns orange for 2500Mbps or green for 1000Mbps and 100Mbps The light is off for 10Mbps CN6 supports AMT and USB3 2 Gen 2x1 10Gbps Both CN5 and CN6 support Wake on LAN Pin LAN Signal Pin LAN Signal L1 Tx Data transmission positive L2 Tx Data transmission negative L3 Rx Data reception positi...

Страница 19: ...CN8 The internal keyboard PS 2 type interface is available through a 5 pin connector 2 3 11 Internal Mouse Connector CN9 The internal mouse PS 2 type interface is available through a 5 pin connector Pin Signal Pin Signal 1 DIO1 2 DIO8 3 DIO2 4 DIO7 5 DIO3 6 DIO6 7 DIO4 8 DIO5 9 NC 10 GND Pin Signal 1 Keyboard Clock 2 Keyboard Data 3 NC 4 GND 5 5V level Pin Signal 1 Mouse Clock 2 Mouse Data 3 NC 4 ...

Страница 20: ... NC 29 PERn1 30 NC 31 PERp1 32 NC 33 GND 34 NC 35 PETn1 36 NC 37 PETp1 38 NC 39 GND 40 NC 41 PERn0 42 NC 43 PERp0 44 NC 45 GND 46 NC 47 PETn0 48 NC 49 PETp0 50 PERST 51 GND 52 CLKREQ 53 REFCLKn 54 PEWAKE 55 REFCLKp 56 NC 57 GND 58 NC 59 CONNECTOR Key M 60 CONNECTOR Key M 61 CONNECTOR Key M 62 CONNECTOR Key M 63 CONNECTOR Key M 64 CONNECTOR Key M 65 CONNECTOR Key M 66 CONNECTOR Key M 67 NC 68 NC 69...

Страница 21: ...D Pin Signal Pin Signal 1 PCH_WAKE_N 2 3 3V_DUAL 3 N C 4 GND 5 N C 6 1 5V 7 3 3V_DUAL 8 UIM_PWR 9 GND 10 UIM_DAT 11 CLKOUT_PCIE_N3 12 UIM_CLK 13 CLKOUT_PCIE_P3 14 UIM_RST 15 GND 16 UIM_VPP 17 N C 18 GND 19 N C 20 RF_KILL _WIFI 21 GND 22 BUF_PLT_RST_N 23 PCIE7_RX_DN 24 3 3V_DUAL 25 PCIE7_RX_DP 26 GND 27 GND 28 1 5V 29 GND 30 SMB_CLK_RESUME 31 PCIE7_TX_DN 32 SMB_DATA_RESUME 33 PCIE7_TX_DP 34 GND 35 ...

Страница 22: ...2 pin p 2 54mm Note The buzzer on the motherboard will be active when pin 2 and pin 4 are connected the external speaker on the chassis will be active when pin 2 and pin 4 are open Pin Signal Pin Signal 1 VCC3P3 2 GND 3 MOSI 4 MISO 5 CLK 6 CS2 7 RST 8 PIRQ 9 PP 10 NC 11 NC 12 NC 13 NC 14 MC Pin Signal 1 Power LED 2 SPK 3 GND 4 BUZZER 5 Power LED 6 N C 7 N C 8 SPK 9 PWR 10 PWR 11 RESET 12 RESET 13 ...

Страница 23: ...stem instability ATX1 CPU power input connector CN18 24 pin power input connector 2 3 19 Internal USB 3 2 Gen1 5Gbps Connector CN20 and CN21 The CN20 CN21 is a 19 pin internal connector for installing various USB 3 2 Gen1 5Gbps compliant peripherals Pin ATX1 Signal Pin ATX1 Signal 1 GND 5 12V 2 GND 6 12V 3 GND 7 12V 4 GND 8 12V Pin CN19 Signal Pin CN19 Signal 1 3 3V 13 3 3V 2 3 3V 14 12V 3 GND 15 ...

Страница 24: ...has three fan connectors Find fan speed option s at BIOS Setup Utility Advanced HW Monitor PC Health Status The FAN1 4x1 pin p 2 54mm is for the CPU fan connector The FAN2 and FAN3 4x1 pin p 2 54mm are for system fan connectors Pin Signal Pin Signal 1 DCD 2 DSR 3 RXD 4 RTS 5 TXD 6 CTS 7 DTR 8 RI 9 GND 10 N C Pin Signal 1 GND 2 12V 3 FAN Speed Detection 4 FAN Speed Control Pin Signal 1 GND 2 12V 3 ...

Страница 25: ...S B11 PCH_WAKE_N A11 PWRGD B12 N C A12 GND B13 GND A13 CLKOUT_PCIE_P5 B14 PCIE1_SLOT1_TX_DP_C A14 CLKOUT_PCIE_N5 B15 PCIE1_SLOT1_TX_DN_C A15 GND B16 GND A16 PCIE1_SLOT1_RX_DP_C B17 PCIEX4_SLOT1_PRSNT2_N A17 PCIE1_SLOT1_RX_DN_C B18 GND A18 GND B19 PCIE2_TX_DP A19 N C B20 PCIE2_TX_DN A20 GND B21 GND A21 PCIE2_RX_DP B22 GND A22 PCIE2_RX_DN B23 PCIE3_TX_DP A23 GND B24 PCIE3_TX_DN A24 GND B25 GND A25 P...

Страница 26: ... Serial Advanced Technology Attachment Serial ATA or SATA connectors are for SATA 3 0 interface allowing up to 6 0Gb s data transfer rate It is a computer bus interface for connecting to devices such as hard disk drive Pin Signal 1 GND 2 SATA_TX 3 SATA_TX 4 GND 5 SATA_RX 6 SATA_RX 7 GND 2 4 1 3 ...

Страница 27: ...ormance depends on the microprocessor Make sure all correct settings are arranged for your installed microprocessor to prevent the CPU from damages Note Caution Make sure turnoff the power before you install the processor into the CPU socket 3 2 BIOS The IMB540 series uses AMI Plug and Play BIOS 3 3 System Memory The IMB540 supports four 288 pin DDR4 DIMM sockets for maximum memory capacity up to ...

Страница 28: ...IMB540 User s manual 22 Hardware Description This page is intentionally left blank ...

Страница 29: ...OS the main BIOS setup menu displays You can access the other setup screens from the main BIOS setup menu such as the Advanced and Chipset menus Note If your computer cannot boot after making and saving system changes with BIOS setup you can restore BIOS optimal defaults by setting press the tact switch SW1 for 5 seconds see section 2 3 3 It is strongly recommended that you should avoid changing t...

Страница 30: ... you to display the setup sub screens Plus Minus The Plus and Minus Arrow keys allow you to change the field value of a particular setup item F1 The F1 key allows you to display the General Help screen F2 The F2 key allows you to Load Previous Values F3 The F3 key allows you to Load Optimized Defaults F4 The F4 key allows you to save any changes you have made and exit Setup Press the F4 key to sav...

Страница 31: ... below The Main BIOS setup screen is shown below BIOS Information Display the BIOS information System Date Time Use this option to change the system time and date Highlight System Time or System Date using the Arrow keys Enter new values through the keyboard Press the Tab key or the Arrow keys to move between fields The date must be entered in MM DD YY format The time is entered in HH MM SS format...

Страница 32: ... select any of the items in the left frame of the screen to go to the sub menus Trusted Computing Platform Misc Configuration CPU Configuration Storage Configuration NVMe Configuration AMT configuration F81966 Super IO Configuration Hardware Monitor USB Configuration PCI Subsystem Settings CSM Configuration For items marked with please press Enter for more options ...

Страница 33: ...IMB540 User s manual AMI BIOS Setup Utility 27 Trusted Computing Enable or disable security device support ...

Страница 34: ... Configuration Native PCIE Enable Bit PCIe Native control n 0 Hot Plug n 1 SHPC Native Hot Plug control n 2 Power Management Events n 3 PCIe Advanced Error Reporting control n 4 PCIe Capability Structure control n 5 Latency Tolerance Reporting control Native ASPM Enabled OS Controlled ASPM Disabled BIOS Controlled ASPM ...

Страница 35: ...ows a single physical processor to multitask as multiple logical processors When disabled only one thread per enabled core is enabled Intel Virtualization Technology Enable or disable Intel Virtualization Technology When enabled a VMM Virtual Machine Mode can utilize the additional hardware capabilities It allows a platform to run multiple operating systems and applications independently hence ena...

Страница 36: ...Boot performance mode Select the performance mode that the BIOS will run after the reset Intel R SpeedStep tm Allows more than two frequency ranges to be supported Turbo Mode Allows to enable processor cores to raise the operating frequency Storage Configuration This screen shows storage information ...

Страница 37: ...able or disable the SATA Controller feature The default is Enabled VMD Setup Menu VMD Configuration settings The default is Disabled Hot Plug Designates this port as Hot Pluggable Spin Up Device Staggered Spin Up will be performed when any of the drive is enabled for the performance strategy Otherwise all drives spin up at boot Only HDD supports this function SATA Device Type Identify the SATA por...

Страница 38: ...IMB540 User s manual 32 AMI BIOS Setup Utility NVMe Configuration This screen shows NVMe device information AMT Configuration This screen displays Active Management Technology information ...

Страница 39: ... the Super IO Configuration and change the value of the selected option A description of the selected item appears on the right side of the screen For items marked with please press Enter for more options Serial Port 1 This tiem allows you to use it as RS232 422 485 The default is RS232 Serial Port 2 This tiem allows you to use it as RS232 422 485 The default is RS232 Serial Port 3 6 This tiem all...

Страница 40: ...these items to set parameters related to serial port 1 and 2 Serial Port 1 This tiem allows you to use it as RS232 422 485 The default is RS232 Serial Port 2 This tiem allows you to use it as RS232 422 485 The default is RS232 Serial Port 3 6 This tiem allows you to use RS232 only ...

Страница 41: ...lity 35 Hardware Monitor This screen monitors hardware health status This screen displays the temperature of system and CPU cooling fans speed in RPM and system voltages VCC_CPU DDR 12V 5V and 3 3V Note CPU FAN FAN1 SYS FA FAN2 AUX FAN FAN3 ...

Страница 42: ...IMB540 User s manual 36 AMI BIOS Setup Utility USB Configuration This screen shows USB configuration ...

Страница 43: ...up Utility 37 PCI Subsystem Settings This screen allows you to set PCI Subsystem mode PCI Latency Timer Set the value to be programmed into PCI Latency Timer Register VGA Palette Snoop Enables or Disables VGA Palette Registers Snooping ...

Страница 44: ...e is executed above 1MB Option ROM Messages Set display mode for Option ROM INT19 Trap Response BIOS reaction on INT19 trapping by Option ROM IMMEDIATE execute the trap right away POSTPONED execute the trap during legacy boot Boot option filter This option controls Legacy UEFI ROMs priority Storage Controls the execution of UEFI and Legacy Storage OpROM Video Controls the execution of UEFI and Leg...

Страница 45: ...The Chipset menu allows users to change the advanced chipset settings You can select any of the items in the left frame of the screen to go to the sub menus System Agent SA Configuration PCH IO Configuration For items marked with please press Enter for more options ...

Страница 46: ...nter for more options VT d Check to enable VT d function on MCH Above 4GB MMIO BIOS assignment Enable Disable above 4GB Memory Mapped IO BIOS assignment n n This is enabled automatically when Aperture Size is set to 2048MB Graphics Configuration Open the sub menu for parameters related to graphics configuration CPU PCI Express Root Port Set the ASPM Level and PCI Express Speed ...

Страница 47: ...IMB540 User s manual AMI BIOS Setup Utility 41 Graphics Configuration This screen shows graphics configuration Internal Graphics Keep IGFX enabled based on the setup options ...

Страница 48: ...oot Port This screen shows CPU PCI Express root port information ASPM Set the ASPM Level nForce L0s Force all links to L0s State nForce L1 Force all links to L1 State nForce L0sL1 Force all links to L0SL1 State nDISABLE Disables ASPM PCIe Speed Configure PCIe Speed ...

Страница 49: ...lity 43 PCH IO Configuration This screen allows you to set PCH parameters PCI Express Configuration Configure PCIe Speed HD Audio Configuration Enable or disable HD Audio Wake on LAN Enable Enable or disable integrated LAN to wake the system ...

Страница 50: ...IMB540 User s manual 44 AMI BIOS Setup Utility PCI Express Configuration This screen shows PCI Express configuration Note PCIE 1 PCIE5 PCIE 21 PCIE3 PCIE 25 PCIE2 ...

Страница 51: ...Speed Configure PCIe Speed ASPM Set the ASPM Level nForce L1 Force all links to L1 State nAUTO BIOS auto configure nDISABLE Disables ASPM Detect Non Compliance Device Detect Non Compliance PCI Express Device If enabled it will take more time at POST time ...

Страница 52: ...IMB540 User s manual 46 AMI BIOS Setup Utility HD Audio Configuration This screen shows HD Audio information ...

Страница 53: ...ettings for the system Administrator Password This item indicates whether an administrator password has been set installed or uninstalled User Password This item indicates whether a user password has been set installed or uninstalled Secure Boot This item is available on the UEFI firmware to provide a secure environment ...

Страница 54: ...nite waiting Bootup NumLock State Use this item to select the power on state for the keyboard NumLock Quiet Boot Select to display either POST output messages or a splash screen during boot up Network Stack Use this item to run the BIOS of your device through the internet instead of Hard Drives Boot Option Priorities These are settings for boot priority Specify the boot device priority sequence fr...

Страница 55: ...ystem configuration and return to Main Menu Select Discard Changes and Exit from the Save Exit menu and press Enter Select Yes to discard changes and exit Save Changes and Reset When you have completed the system configuration changes select this option to leave Setup and reboot the computer so the new system configuration parameters can take effect Select Save Changes and Reset from the Save Exit...

Страница 56: ...tore Defaults It automatically sets all Setup options to a complete set of default settings when you select this option Select Restore Defaults from the Save Exit menu and press Enter Save as User Defaults Select this option to save system configuration changes done so far as User Defaults Select Save as User Defaults from the Save Exit menu and press Enter Restore User Defaults It automatically s...

Страница 57: ...o install the TPM 2 0 module into the IMB540 Please read and follow the instructions below carefully 1 Insert TPM module into the SPI interface of motherboard as illustrated below 2 There are two ways to confirm whether the TPM Module is installed successfully or not a Enter the BIOS setup menu and go to Trusted Computing On the first line it will show TPM2 0 Device Found In the Advance menu go to...

Страница 58: ... Computing section on the first of line it will show TPM2 0 Device Found if installation is successful b In the Windows 10 OS environment enter Device Manager and selectSecurity devices The screen will show Trusted Platform Module 2 0 if installation is successful ...

Страница 59: ...al TPM Module Installation 53 c In the Windows 10 OS environment enter Control Panel select BitLocker Drive Encryption and enter TPM Administration The screen will show the information below if installation is successful ...

Страница 60: ...IMB540 User s manual 54 TPM Module Installation This page is intentionally left blank ...

Страница 61: ...rd and then select Intel iAMT as the manageability feature Entering Management Engine BIOS Extension MEBx 1 Go to BIOS to enable the iAMT function 2 After restarting BIOS exit and enter MEBx Setting Set and Change Password 1 You will be asked to set a password at first login The default password is admin 2 You will be asked to change the password before setting ME 3 Confirm your new password while...

Страница 62: ...IMB540 User s manual 56 iAMT Settings iAMT Settings 1 Select Intel AMT configuration and press Enter 2 Select Network Setup to configure iAMT ...

Страница 63: ...IMB540 User s manual iAMT Settings 57 3 Go back to Intel AMT Configuration then select Activate Network Access and press Enter 4 Exit from MEBx after completing the iAMT settings ...

Страница 64: ...eb Console 1 On a web browser type http IP ADDRESS 16992 which connects to iAMT Web Example http 10 1 40 214 16992 2 To log on you will be required to type in your username and password for access to the Web USER admin default PASS MEBx password ...

Страница 65: ...IMB540 User s manual iAMT Settings 59 3 Enter the iAMT Web 4 Click Remote Control and select commands on the right side ...

Страница 66: ...IMB540 User s manual 60 iAMT Settings 5 When you have finished using the iAMT Web console close the Web browser ...

Страница 67: ...as a pointer to determine which of the following registers will be written or read Register 0 Input port register This register is a read only port It reflects the incoming logic levels of the pins regardless of whether the pin is defined as an input or an output by Register 3 Writes to this register have no effect The default X is determined by the externally applied logic level normally 1 when n...

Страница 68: ... 3 O3 R 1 2 O2 R 1 1 O1 R 1 0 O0 R 1 Default value Register 2 Configuration register This register configures the directions of the I O pins If a bit in this register is set the corresponding port pin is enabled as an input with a high impedance output driver If a bit in this register is cleared the corresponding port pin is enabled as an output At reset the I Os are configured as inputs with a we...

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