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Acknowledgments 

 

Award is a registered trademark of Award Software International, 
Inc. 
PS/2 is a trademark of International Business Machines 
Corporation. 
Intel and Atom are registered trademarks of Intel Corporation. 
Microsoft Windows is a registered trademark of Microsoft 
Corporation. 
Winbond is a registered trademark of Winbond Electronics 
Corporation. 
All other product names or trademarks are properties of their 
respective owners. 

 

ii

MI800 User’s Manual

 

 

Summary of Contents for MI800

Page 1: ...MI800 Intel Atom 945GC Mini ITX Motherboard USER S MANUAL Version 1 0A ...

Page 2: ...ess Machines Corporation Intel and Atom are registered trademarks of Intel Corporation Microsoft Windows is a registered trademark of Microsoft Corporation Winbond is a registered trademark of Winbond Electronics Corporation All other product names or trademarks are properties of their respective owners ii MI800 User s Manual ...

Page 3: ...tting the Jumpers 7 Connectors on MI800 12 BIOS Setup 23 Drivers Installation 45 Intel Chipset Software Installation Utility 46 VGA Drivers Installation 49 AC97 Codec Audio Driver Installation 51 LAN Drivers Installation 53 Appendix 57 A I O Port Address Map 57 B Interrupt Request Lines IRQ 58 C Watchdog Timer Configuration 59 MI800 User s Manual iii ...

Page 4: ...iv MI800 User s Manual This page is intentionally left blank ...

Page 5: ... of the MI800 Mini ITX Motherboard are Supports Intel Atom 230 processor with 1 6GHz speed Two DDRII SDRAM DIMM supports up to 2GB of DDR2 400 533MHz memory Onboard 10 100 BaseT and Intel 82574L PCI Express Gigabit LAN Intel 945GC VGA for CRT SDVO port supports LVDS and DVI 2x SATA 6x USB 2 0 4x COM Watchdog timer 1x PCI 1x MiniPCIe CF socket DC in for 12V 19V input Dimensions of the board are 170...

Page 6: ...33 66 100 CF Audio ICH7 built in Audio controller ALC 662 5 1 Channel Line in Line out MIC LPC I O Winbond W83627EHG COM1 RS232 COM2 RS232 422 485 Hardware monitor 3 thermal inputs 4 voltage monitor inputs VID0 4 2 Fan Headers 2 nd LPC I O Fintek F81216DG COM3 COM4 RS232 Digital IO 4 in 4 out Keyboard Mouse Connector Supports PS 2 Keyboard Mouse Expansion PCI slot x1 PCI E x1 slot x1 and Mini PCI ...

Page 7: ...INTRODUCTION Board Dimensions MI800 User s Manual 3 ...

Page 8: ...INTRODUCTION 4 MI800 User s Manual ...

Page 9: ...l 5 Installations This section provides information on how to use the jumpers and connectors on the MI800 in order to set up a workable system The topics covered are Installing the Memory 6 Setting the Jumpers 7 Connectors on MI800 12 ...

Page 10: ...ot on the board and perform the following steps 1 Hold the DDR2 module so that the key of the DDR2 module align with those on the memory slot 2 Gently push the DDR2 module in an upright position until the clips of the slot close to hold the DDR2 module in place when the DDR2 module touches the bottom of the slot 3 To remove the DDR2 module press the clips with both hands DDR2 Module Lock Lock Lock...

Page 11: ...oubts about the best configuration for your needs The following lists the connectors on MI800 and their respective functions Jumper Locations on MI800 8 JP1 ATX AT Mode Select 9 JP2 JP3 JP4 RS232 422 485 COM2 Selection 9 JP5 COM4 RS232 5V 12V Power Setting 10 JP6 COM3 RS232 5V 12V Power Setting 10 JP8 LCD Panel Power Selection 10 JP9 Clear CMOS Setting 10 J17 CompactFlash Slave Master Selection 11...

Page 12: ... ATX AT Mode Select 9 JP2 JP3 JP4 RS232 422 485 COM2 Selection 9 JP5 COM4 RS232 5V 12V Power Setting 10 JP6 COM3 RS232 5V 12V Power Setting 10 JP8 LCD Panel Power Selection 10 JP9 Clear CMOS Setting 10 J17 CompactFlash Slave Master Selection 11 8 MI800 User s Manual ...

Page 13: ...ngs for COM2 selection COM2 Function RS 232 RS 422 RS 485 Jumper Setting pin closed JP4 1 2 JP3 3 5 4 6 JP2 3 5 4 6 JP4 3 4 JP3 1 3 2 4 JP2 1 3 2 4 JP4 5 6 JP3 1 3 2 4 JP2 1 3 2 4 COM2 is jumper selectable for RS 232 RS 422 and RS 485 Pin Signal Name RS 232 R2 422 RS 485 11 DCD TX DATA 13 RX TX DATA 15 TX RX NC 17 DTR RX NC 19 Ground Ground Ground 12 DSR RTS NC 14 RTS RTS NC 16 CTS CTS NC 18 RI CT...

Page 14: ...n 5 6 short 5V Pin 3 4 Standard COM Port JP6 COM3 RS232 5V 12V Power Setting Pin Signal Name JP6 Signal Name Pin 1 RI 12V 2 3 RI Default RI Default 4 5 RI 5V 6 COM3 Settings Pin 1 2 short 12V Pin 5 6 short 5V Pin 3 4 Standard COM Port JP8 LCD Panel Power Selection JP8 LCD Panel Power 3 3V 5V JP9 Clear CMOS Setting JP9 Setting Normal Clear CMOS 10 MI800 User s Manual ...

Page 15: ...INSTALLATIONS J17 CompactFlash Slave Master Selection J17 CF Setting Master Slave MI800 User s Manual 11 ...

Page 16: ... CN6 GbE RJ 45 and USB3 4 Ports 16 CN7 Audio Connector 16 CN8 CN9 Serial ATA Connectors 16 CN10 Mini PCI E x1 Connector bottom side 16 CN11 Compact Flash Connector bottom side 16 PCI1 PCI Slot supports 2 Master 16 IDE1 IDE Connector 17 J1 HDD Power Connector Output Max 2A 17 J2 ATX_12V Connector 17 J3 Digital I O 18 J4 COM1 COM2 Serial Ports 18 J5 COM3 COM4 Serial Ports 錯誤 尚未定義書籤 J6 Wake On LAN Co...

Page 17: ...INSTALLATIONS Connector Locations on MI800 MI800 User s Manual 13 ...

Page 18: ...INSTALLATIONS 14 MI800 User s Manual ...

Page 19: ...ystem fans The fan must be 12V Max 500mA Pin Signal Name 1 Ground 2 12V 3 Rotation detection CN1 DC Jack DC in 12V or 19V Remarks CN1 and J2 connectors cannot be connected at the same time CN2 PS 2 Keyboard and PS 2 Mouse Connectors PS 2 Mouse PS 2 Keyboard Signal Name Keyboard Mouse Signal Name Keyboard data 1 1 Mouse data N C 2 2 N C GND 3 3 GND 5V 4 4 5V Keyboard clock 5 5 Mouse clock N C 6 6 N...

Page 20: ... 2 4 3 18 DATA 0 DATA 4 4 19 SHIELD 0 5 DATA 4 5 20 DATA 5 DDC CLOCK 6 21 DATA 5 DDC DATA 7 22 SHIELD CLK VSYNC 8 23 CLOCK DATA 1 9 24 CLOCK DATA 1 10 SHIELD 1 3 11 DATA 3 12 DATA 3 13 DDC POWER 14 A GROUND 1 15 CN5 10 100 RJ 45 and USB1 2 Ports CN6 GbE RJ 45 and USB3 4 Ports CN7 Audio Connector CN8 CN9 Serial ATA Connectors CN10 Mini PCI E x1 Connector bottom side CN11 Compact Flash Connector bot...

Page 21: ...ound Host IOW 23 24 Ground Host IOR 25 26 Ground IOCHRDY 27 28 Host ALE DACK0 29 30 Ground IRQ14 31 32 No connect Address 1 33 34 No connect Address 0 35 36 Address 2 Chip select 0 37 38 Chip select 1 Activity 39 40 Ground J1 HDD Power Connector Output Max 2A Pin Signal Name 1 12V 2 Ground 3 Ground 4 5V Note 12V power is provided with 2A maximum load J2 ATX_12V Connector J2 is a DC in internal con...

Page 22: ...erminal ready 9 19 Ground 2 12 DSR Data set ready 4 14 RTS Request to send 6 16 CTS Clear to send 8 18 RI Ring indicator 10 20 No Connect COM2 supports RS 232 422 485 J5 COM3 COM4 Serial Ports Pin Signal Name RS 232 1 11 DCD Data carrier detect 3 13 RXD Receive data 5 15 TXD Transmit data 7 17 DTR Data terminal ready 9 19 Ground 2 12 DSR Data set ready 4 14 RTS Request to send 6 16 CTS Clear to se...

Page 23: ... 3 4 HDD Active Ground 5 7 Reset ATX power on switch Pins 1 2 HDD LED Pins 3 4 Reset switch Pins 5 6 J9 J10 LVDS Connectors 1st channel 2nd channel The LVDS connectors on board consist of the first channel and second channel and supports 18 bit or 24 bit Signal Name Pin Pin Signal Name TX0 2 1 TX0 Ground 4 3 Ground TX1 6 5 TX1 5V 3 3V 8 7 Ground TX3 10 9 TX3 TX2 12 11 TX2 Ground 14 13 Ground TXC 1...

Page 24: ...12V 2 Backlight Enable 3 Backlight ADJ 4 Ground Pin Signal Name 1 12V 2 Backlight Enable 3 Ground J13 SPI Debug Tools Port Factory use only J16 Audio Front Header Signal Name Pin Pin Signal Name MIC2_L 1 2 Ground MIC2_R 3 4 Presence Line2_R 5 6 MIC2_ID Sense 7 8 NC Line2_L 9 10 Line2_ID J18 SPDIF Out Connector Pin Signal Name 1 SPDIF out 2 Ground 20 MI800 User s Manual ...

Page 25: ...INSTALLATIONS J19 Smart Battery Connector Pin Signal Name 1 PCIRST 2 EMTSMI 3 Ground 4 SMBDATA 5 SMBCLK MI800 User s Manual 21 ...

Page 26: ...INSTALLATIONS 22 MI800 User s Manual This page is intentionally left blank ...

Page 27: ...are as follows BIOS Introduction 24 BIOS Setup 24 Standard CMOS Setup 26 Advanced BIOS Features 29 Advanced Chipset Features 32 Integrated Peripherals 34 Power Management Setup 38 PNP PCI Configurations 41 PC Health Status 42 Frequency Voltage Control 43 Load Fail Safe Defaults 44 Load Optimized Defaults 44 Set Supervisor User Password 44 Save Exit Setup 44 Exit Without Saving 44 ...

Page 28: ...S is immediately activated Pressing the Del key immediately allows you to enter the Setup utility If you are a little bit late pressing the Del key POST Power On Self Test will continue with its test routines thus preventing you from invoking the Setup If you still wish to enter Setup restart the system by pressing the Reset button or simultaneously pressing the Ctrl Alt and Delete keys You can al...

Page 29: ...displays the control keys for this menu At the bottom of the Main Menu just below the control keys section there is another section which displays information on the currently highlighted item in the list Note If the system cannot boot after making and saving system changes with Setup the Award BIOS supports an override to the CMOS settings that resets your system to its default Warning It is stro...

Page 30: ...mm ss 00 00 00 Menu Level IDE Channel 0 Master None Change the day month Year and century IDE Channel 0 Slave None IDE Channel 1 Master None IDE Channel 1 Slave None Video EGA VGA Halt On All Errors Base Memory 640K Extended Memory 514048K Total Memory 515072K At the bottom of the menu are the control keys for use on this menu If you need any help in each item field you can press the F1 key It wil...

Page 31: ...lowing items Capacity Capacity size of the hard disk drive CYLS Number of cylinders HEAD Number of read write heads PRECOMP Write precompensation LANDING ZONE Landing zone SECTOR Number of sectors The Access Mode selections are as follows CHS HD 528MB LBA HD 528MB and supports Logical Block Addressing Large for MS DOS only Auto Remarks The main board supports two serial ATA ports and are represent...

Page 32: ... All errors Whenever the BIOS detects a non fatal error the system will stop and you will be prompted All But Keyboard The system boot will not be halted for a keyboard error it will stop for all other errors All But Diskette The system boot will not be halted for a disk error it will stop for all other errors All But Disk Key The system boot will not be halted for a key board or disk error it wil...

Page 33: ...ntrol for OS 1 4 OS Select For DRAM 64MB Non OS2 Report No FDD For WIN 95 No Small Logo EPA Show Disabled CPU Feature Press Enter to configure the settings relevant to CPU Feature Hard Disk Boot Priority With the field there is the option to choose aside from the hard disks connected Bootable add in Cards which refers to other external devices Virus Warning If this option is enabled an alarm messa...

Page 34: ... the BIOS swaps floppy drive assignments so that Drive A becomes Drive B and Drive B becomes Drive A By default this field is set to Disabled Boot Up Floppy Seek This feature controls whether the BIOS checks for a floppy drive while booting up If it cannot detect one either due to improper configuration or its absence it will flash an error message Boot Up NumLock Status This allows you to activat...

Page 35: ...version for your operating system MPS version 1 4 added extended configuration tables to improve support for multiple PCI bus configurations and improve future expandability The default setting is 1 4 OS Select for DRAM 64MB This option allows the system to access greater than 64MB of DRAM memory when used with OS 2 that depends on certain BIOS calls to access memory The default setting is Non OS ...

Page 36: ... Size 8MB DVMT Mode DVMT DVMT FIXED memory Size 128MB SDVO LVDS Protocol 1 ch 18 bit SDVO Panel Number 1024 x 768 Boot Display CRT DRAM Timing Selectable This option refers to the method by which the DRAM timing is selected The default is By SPD CAS Latency Time You can configure CAS latency time in HCLKs as 2 or 2 5 or 3 The system board designer should set the values in this field depending on t...

Page 37: ...if any program writes to this memory area a system error may result Video BIOS Cacheable The Setting Enabled allows caching of the video BIOS ROM at C0000h F7FFFh resulting in better video performance However if any program writes to this memory area a system error may result Memory Hole At 15M 16M In order to improve performance certain space in memory can be reserved for ISA cards This memory mu...

Page 38: ...enu Level IDE Primary Slave PIO Auto IDE Primary Master UDMA Auto IDE Primary Slave UDMA Auto On Chip Secondary PCI IDE Enabled IDE Secondary Master PIO Auto IDE Secondary Slave PIO Auto IDE Secondary Master UDMA Auto IDE Secondary Slave UDMA Auto On Chip Serial ATA Setting On Chip Serial ATA Auto SATA Port Speed Settings Disabled PATA IDE Mode Primary SATA port P1 P3 is Secondary Phoenix AwardBIO...

Page 39: ...roller contains an IDE interface with support for two IDE channels Select Enabled to activate each channel separately IDE Primary Secondary Master Slave PIO These fields allow your system hard disk controller to work faster Rather than have the BIOS issue a series of commands that transfer to or from the disk drive PIO Programmed Input Output allows the BIOS to communicate with the controller and ...

Page 40: ...ndows XP SP2 USB Keyboard Function By default the USB keyboard function is set to Enabled Azalia AC97 Audio Select This field by default is set to Auto The selections are Azalia AC97 Audio and Modem AC97 Audio only AC97 Modem only and All Disabled Power ON Function This field is related to how the system is powered on such as with the use of conventional power button keyboard or hot keys The defau...

Page 41: ... select the onboard serial ports and their addresses The default values for these ports are Serial Port 1 3F8 IRQ4 Serial Port 2 2F8 IRQ3 PWRON After PWR Fail This field sets the system power status whether on or off when power returns to the system from a power failure situation ...

Page 42: ...m ss Alarm 0 0 0 Reload Global Timer Events Primary IDE 0 Disabled Primary IDE 1 Disabled Secondary IDE 0 Disabled Secondary IDE 1 Disabled FDD COM LPT Port Disabled PCI PIRQ A D Disabled ACPI Function Enable this function to support ACPI Advance Configuration and Power Interface ACPI Suspend The default setting of the ACPI Suspend mode is S1 POS RUN VGABIOS if S3 Resume The default setting of thi...

Page 43: ...m inactivity all devices except the CPU will be shut off HDD Power Down When enabled and after the set time of system inactivity the hard disk drive will be powered down while all other devices remain active Soft Off by PWRBTN This field defines the power off mode when using an ATX power supply The Instant Off mode allows powering off immediately upon pressing the power button In the Delay 4 Sec m...

Page 44: ... Timer Events The HDD FDD COM LPT Ports and PCI PIRQ are I O events that can prevent the system from entering a power saving mode or can awaken the system from such a mode When an I O device wants to gain the attention of the operating system it signals this by causing an IRQ to occur When the operating system is ready to respond to the request it interrupts itself and performs the service ...

Page 45: ...oad Size 4096 Init Display First The default setting is PCI Card Reset Configuration Data This field allows you to determine whether to reset the configuration data or not The default value is Disabled Resources Controlled by This PnP BIOS can configure all of the boot and compatible devices with the use of a PnP operating system such as Windows 95 PCI VGA Palette Snoop Some non standard VGA displ...

Page 46: ... Fan 1 1st Smart Fan Temperature Disabled 2nd Smart Fan Temperature Disabled CPU Warning Temperature This field allows the user to set the temperature so that when the temperature is reached the system sounds a warning This function can help prevent damage to the system that is caused by overheating Temperatures Voltages These fields are the parameters of the hardware monitoring function feature o...

Page 47: ...etup Utility Frequency Voltage Control Auto Detect PCI Clk Disabled ITEM HELP Spread Spectrum Modulated Disabled Menu Level Auto Detect PCI Clk This field enables or disables the auto detection of the PCI clock Spread Spectrum Modulated This field sets the value of the spread spectrum The default setting is Disabled This field is for CE testing use only ...

Page 48: ...ssword message prompts on the screen Type the password up to eight characters in length and press Enter The system confirms your password by asking you to type it again After setting a password the screen automatically returns to the main screen To disable a password just press the Enter key when you are prompted to enter the password A message will confirm the password to be disabled Once the pas...

Page 49: ...tems missing please contact the vendor where you made the purchase The contents of this section include the following Intel Chipset Software Intallation Utility 46 VGA Drivers Installation 49 AC97 Codec Audio Driver Installation 51 LAN Drivers Installation 53 IMPORTANT NOTE After installing your Windows operating system Windows 2000 XP you must install first the Intel Chipset Software Installation...

Page 50: ...re drivers to enable Plug Play INF support for Intel chipset components Follow the instructions below to complete the installation under Windows 2000 XP 1 Insert the CD that comes with the board Click Intel Chipsets and then Intel R I945G GC Chipset Drivers 2 Click Intel R Chipset Software Installation Utility 46 MI800 User s Manual ...

Page 51: ...DRIVERS INSTALLATION 3 When the Welcome screen appears click Next to continue 4 Click Yes to accept the software license agreement and proceed with the installation process MI800 User s Manual 47 ...

Page 52: ...5 On Readme Information screen click Next to continue the installation 6 The setup process will be in progress When Setup completed click Finish to restart the computer and for changes to take effect 48 MI800 User s Manual ...

Page 53: ...ll the VGA drivers follow the steps below to proceed with the installation 1 Insert the CD that comes with the board Click Intel Chipsets and then Intel R I945G GC Chipset Drivers Click Intel R I945G GC Chipset Family Graphics Driver MI800 User s Manual 49 ...

Page 54: ...h the license agreement and continue the installation 4 On Readme File Information screen click Next to continue 5 On Setup Progress screen click Next to continue the installation 6 The Setup process is now complete Click Finish to restart the computer and for changes to take effect 50 MI800 User s Manual ...

Page 55: ...llation Follow the steps below to install the Realtek AC97 Codec Audio Drivers 1 Insert the CD that comes with the motherboard Click Intel Chipsets and then Intel R I945G GC Chipset Drivers Click Realtek AC 97 Codec Audio Driver MI800 User s Manual 51 ...

Page 56: ... the Welcome screen appears click Next to continue 3 Setup has finished installing Realtek High Definition Audio Driver on your computer Click Finish to restart the computer and for changes to take effect 52 MI800 User s Manual ...

Page 57: ...stallation Follow the steps below to install the Intel 82574L LAN Drivers 1 Insert the CD that comes with the board Click LAN Card and then Intel R PRO 82574L LAN Drivers 2 In the next screen click Install Drivers MI800 User s Manual 53 ...

Page 58: ...t 4 In the License Agreement screen click Next to accept the terms in the license agreement 5 In the Setup Options screen click the checkbox of Drivers to select it and then click Next 6 Click Next to begin installation of the drivers 7 When the InstallShield Wizard is completed click Finish 54 MI800 User s Manual ...

Page 59: ...tall the Intel PRO LAN Network Drivers 1 Insert the CD that comes with the motherboard Click Intel Chipsets and then Intel R I945G GC Chipset Drivers Click Intel PRO LAN Network Drivers 2 In the next screen click Install Drivers MI800 User s Manual 55 ...

Page 60: ...een click Next to accept the agreement and continue the Setup process In the Setup Type screen of the InstallShield Wizard select Complete and click Next to go to Ready to Install the Program screen Click Install 3 When the Installation is complete click Finish 56 MI800 User s Manual ...

Page 61: ...05Fh Timer 060h 06Fh Keyboard Controller 070h 07Fh Real Time Clock NMI 080h 09Fh DMA Page Register 0A0h 0BFh Interrupt Controller 2 0C0h 0DFh DMA Controller 2 0F0h Clear Math Coprocessor Busy Signal 0F1h Reset Math Coprocessor 1F0h 1F7h IDE Interface 278 27F Parallel Port 2 LPT2 2F8h 2FFh Serial Port 2 COM2 2B0 2DF Graphics adapter Controller 378h 3FFh Parallel Port 1 LPT1 360 36F Network Ports 3B...

Page 62: ...ng table shows the IRQ used by the devices on board Level Function IRQ0 System Timer Output IRQ1 Keyboard IRQ2 Interrupt Cascade IRQ3 Serial Port 2 IRQ4 Serial Port 1 IRQ5 Reserved IRQ6 Floppy Disk Controller IRQ7 Parallel Port 1 IRQ8 Real Time Clock IRQ9 Reserved IRQ10 Reserved IRQ11 Reserved IRQ12 PS 2 Mouse IRQ13 80287 IRQ14 Primary IDE IRQ15 Secondary IDE ...

Page 63: ...MPLE CODE THIS CODE AND INFORMATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OR FITNESS FOR A PARTICULAR PURPOSE include stdio h include stdlib h include W627EHF H int main int argc char argv void copyright void void EnableWDT int void DisableWDT void int main int argc char argv unsigned ch...

Page 64: ...igned char bBuf bBuf Get_W627EHF_Reg 0x2D bBuf 0x01 Set_W627EHF_Reg 0x2D bBuf Enable WDTO Set_W627EHF_LD 0x08 switch to logic device 8 Set_W627EHF_Reg 0x30 0x01 enable timer bBuf Get_W627EHF_Reg 0xF5 bBuf 0x08 Set_W627EHF_Reg 0xF5 bBuf count mode is second Set_W627EHF_Reg 0xF6 interval set timer void DisableWDT void Set_W627EHF_LD 0x08 switch to logic device 8 Set_W627EHF_Reg 0xF6 0x00 clear watch...

Page 65: ...result unsigned char ucDid W627EHF_BASE 0x2E result W627EHF_BASE ucDid Get_W627EHF_Reg 0x20 if ucDid 0x88 goto Init_Finish W627EHF_BASE 0x4E result W627EHF_BASE ucDid Get_W627EHF_Reg 0x20 if ucDid 0x88 goto Init_Finish W627EHF_BASE 0x00 result W627EHF_BASE Init_Finish return result void Unlock_W627EHF void outportb W627EHF_INDEX_PORT W627EHF_UNLOCK outportb W627EHF_INDEX_PORT W627EHF_UNLOCK void L...

Page 66: ... INFORMATION IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND EITHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND OR FITNESS FOR A PARTICULAR PURPOSE ifndef __W627EHF_H define __W627EHF_H 1 define W627EHF_INDEX_PORT W627EHF_BASE define W627EHF_DATA_PORT W627EHF_BASE 1 define W627EHF_REG_LD 0x07 define W627EHF_UNLOCK 0x87 define W627EHF_LOCK 0xAA uns...

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