Intel D845PEMY Specification
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Intel
D845PEMY
Technical Product Specification
®
The Intel
Desktop Board D845PEMY may contain design defects or errors known as errata that may cause the product to deviate from published specifications. Current
characterized errata are documented in the Intel Desktop Board D845PEMY Specification Update.
®
Desktop Board
August 2004
Order Number: C83645-001
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Table of Contents
Related Manuals for Intel D845PEMY
Summary of Contents for Intel D845PEMY
- Page 1 Order Number: C83645-001 ® The Intel Desktop Board D845PEMY may contain design defects or errors known as errata that may cause the product to deviate from published specifications. Current characterized errata are documented in the Intel Desktop Board D845PEMY Specification Update.
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Page 2: Revision History
Intel products are not intended for use in medical, life saving, or life sustaining applications or for any other application in which the failure of the Intel product could create a situation where personal injury or death may occur. -
Page 3: Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board D845PEMY and their components to the vendors, system integrators, and other engineers and technicians who need this level of information. It is specifically not intended for general audiences. - Page 4 When used in the description of a component, N indicates component type, xn are the relative coordinates of its location on the Desktop Board D845PEMY, and X is the instance of the particular part at that general location. For example, J5J1 is a connector, located at 5J. It is the first connector in the 5J area.
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Page 5: Table Of Contents
Board Layout ....................12 Block Diagram......................13 Online Support ......................14 Operating System Support................... 14 Processor ........................15 System Memory ......................16 ® Intel 845PE Chipset ....................18 1.7.1 AGP ....................... 18 1.7.2 USB ....................... 19 1.7.3 IDE Interfaces....................19 1.7.4... - Page 6 Intel Desktop Board D845PEMY Technical Product Specification Connectors........................37 2.8.1 Back Panel Connectors ................. 38 2.8.2 Internal I/O Connectors ................. 39 2.8.3 External I/O Connectors ................44 Jumper Blocks......................48 2.9.1 Front Panel Audio Connector/Jumper Block ..........48 2.9.2 BIOS Setup Configuration Jumper Block ............49 2.10 Mechanical Considerations ..................
- Page 7 Figures Desktop Board D845PEMY Components ..............12 Block Diagram......................13 Location of the Standby Power Indicator LED on the D845PEMY Board ....30 Back Panel Connectors....................38 Audio, Power, and Hardware Control Connectors ............40 Add-in Board and Peripheral Interface Connectors ............. 43 External I/O Connectors....................
- Page 8 Intel Desktop Board D845PEMY Technical Product Specification States for a One-Color Power LED ................46 States for a Two-Color Power LED ................46 Front Panel Audio Connector/Jumper Block ..............49 BIOS Setup Configuration Jumper Settings..............49 DC Loading Characteristics ..................52 Fan Connector Current Capability................
- Page 9 Online Support ......................14 Operating System Support................... 14 Processor ........................15 System Memory ......................16 ® Intel 845PE Chipset ....................18 I/O Controller........................ 21 Audio Subsystem ......................22 1.10 LAN Subsystem ......................23 1.11 Hardware Management Subsystem (Optional) ............24...
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Page 10: Overview
Intel Desktop Board D845PEMY Technical Product Specification 1.1 Overview 1.1.1 Feature Summary ® Table 1 summarizes the major features of the Intel Desktop Board D845PEMY. Table 1. Feature Summary Form Factor microATX (9.20 inches by 8.20 inches [233.68 millimeters by 208.28 millimeters]) •... -
Page 11: Manufacturing Options
Product Description 1.1.2 Manufacturing Options Table 2 describes the manufacturing options on the Desktop Board D845PEMY. Not every manufacturing option is available in all marketing channels. Please contact your Intel representative to determine which manufacturing options are available to you. -
Page 12: Board Layout
Intel Desktop Board D845PEMY Technical Product Specification 1.1.3 Board Layout Figure 1 shows the location of the major components on the Desktop Board D845PEMY. OM17286 Item Description Item Description Audio codec Speaker Intel 82562ET 10/100 Mbit/sec (PLC) device Battery Back panel connectors... -
Page 13: Block Diagram
Processor Socket (400/533 MHz) Intel 82801DB 3 Mbit Intel 82845PE I/O Controller Hub Firmware Hub Memory Controller (ICH4) (FWH) Hub (MCH) Intel 845PE Chipset CSMA/CD Unit Interface Interface 4X AGP Connector (1.5 V only) Memory Bus Physical DIMM Banks (2) Layer... -
Page 14: Online Support
Audio software and utilities http://www.intel.com/design/motherbd LAN software and drivers http://www.intel.com/design/motherbd 1.4 Operating System Support The Desktop Board D845PEMY supports drivers for all of the onboard hardware and subsystems under the following operating systems: • Windows* XP • Windows ME •... -
Page 15: Processor
1.5 Processor The board is designed to support the following: • Intel Pentium 4 processors in an mPGA478 processor socket with a 533/400 MHz system bus • Intel Celeron processors in an mPGA478 processor socket with a 400 MHz system bus •... -
Page 16: System Memory
Intel Desktop Board D845PEMY Technical Product Specification 1.6 System Memory The Desktop Board D845PEMY has two DIMM sockets and is designed to support up to 2 GB of single-channel DDR SDRAM memory. The board supports the following memory features: •... -
Page 17: Supported Ddr Dimm Configurations
Product Description Table 4 lists the supported DDR DIMM configurations. Table 4. Supported DDR DIMM Configurations DIMM Configuration DDR SDRAM DDR SDRAM Organization Number of DDR Capacity (Note) Density Front-side/Back-side SDRAM Devices 64 MB 64 Mbit 8 M x 8/empty 64 MB 128 Mbit 8 M x 16/empty... -
Page 18: Intel ® 845Pe Chipset
1.7 Intel ® 845PE Chipset The Intel 845PE chipset consists of the following devices: • Intel 82845PE Memory Controller Hub (MCH) with Accelerated Hub Architecture (AHA) bus • Intel 82801DB I/O Controller Hub (ICH4) with AHA bus • Firmware Hub (FWH) The MCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the Accelerated Hub Architecture interface. -
Page 19: Usb
Product Description 1.7.2 USB The board supports up to four USB 2.0 ports, fully supports UHCI and EHCI, and uses UHCI- and EHCI-compatible drivers. For more than four USB devices, an external hub can be connected to any of the ports. The ICH4 provides the USB controller for all ports. -
Page 20: Real-Time Clock, Cmos Sram, And Battery
Intel Desktop Board D845PEMY Technical Product Specification INTEGRATOR’S NOTE ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections, noise, and inductive coupling. The IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices. -
Page 21: I/O Controller
Product Description 1.8 I/O Controller The I/O controller provides the following features: • One serial port • One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support • Serial IRQ interface compatible with serialized IRQ support for PCI systems •... -
Page 22: Audio Subsystem
The front panel audio connector is alternately used as a jumper block for routing audio signals. Refer to Section 2.9.1 on page 48 for more information. 1.9.2 Audio Subsystem Software Audio software and drivers are available from Intel’s World Wide Web site. For information about Refer to Obtaining audio software and drivers Section 1.3, page 14... -
Page 23: Lan Subsystem
⎯ Supports LAN wake capabilities 1.10.1 Intel ® 82562ET Platform LAN Connect Device The Intel 82562ET component provides an interface to the back panel RJ-45 connector with integrated LEDs. The Intel 82562ET provides the following functions: • Basic 10/100 Ethernet LAN connectivity •... -
Page 24: Hardware Management Subsystem (Optional)
Intel Desktop Board D845PEMY Technical Product Specification 1.11 Hardware Management Subsystem (Optional) The hardware management features enable the boards to be compatible with the Wired for Management (WfM) specification. The board has several hardware management features, including the following: •... -
Page 25: Power Management
Product Description 1.12 Power Management Power management is implemented at several levels, including: • Software support through Advanced Configuration and Power Interface (ACPI) • Hardware support: ⎯ Power connector ⎯ Fan connectors ⎯ LAN wake capabilities ⎯ Instantly Available PC technology ⎯... -
Page 26: Power States And Targeted System Power
The operating system uses information from applications and user settings to put the system as a whole into a low-power state. Table 7 lists the power states supported by the Desktop Board D845PEMY along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. -
Page 27: Hardware Support
Instantly Available PC technology features are used. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. The Desktop Board D845PEMY provides several power management hardware features, including: • Power connector •... -
Page 28: Fan Connector Function/Operation
Intel Desktop Board D845PEMY Technical Product Specification Resume on Ring enables telephony devices to access the computer when it is in a power-managed state. The method used depends on the type of telephony device (external or internal). NOTE The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support. - Page 29 Product Description 1.12.2.3 LAN Wake Capabilities CAUTION For LAN wake capabilities, the +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing LAN wake capabilities can damage the power supply. LAN wake capabilities enable remote wake-up of the computer through a network.
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Page 30: Location Of The Standby Power Indicator Led On The D845Pemy Board
Intel Desktop Board D845PEMY Technical Product Specification CR1F1 OM17287 Figure 3. Location of the Standby Power Indicator LED on the D845PEMY Board 1.12.2.6 Resume on Ring The operation of Resume on Ring can be summarized as follows: • Resumes operation from ACPI S1 or S3 states •... -
Page 31: Technical Reference
2 Technical Reference What This Chapter Contains Introduction ........................31 Memory Map ........................ 31 Fixed I/O Map....................... 32 DMA Channels ......................33 PCI Configuration Space Map..................33 Interrupts ........................34 PCI Interrupt Routing Map ................... 35 Connectors........................37 Jumper Blocks......................48 2.10 Mechanical Considerations .................. -
Page 32: Fixed I/O Map
I/O Map Address (hex) Size Description 0000 - 00FF 256 bytes Used by the Desktop Board D845PEMY. Refer to the ICH4 data sheet for dynamic addressing information. 0170 - 0177 8 bytes Secondary IDE channel 01F0 - 01F7 8 bytes... -
Page 33: Dma Channels
Number (hex) Description Memory controller of Intel 82845PE component Host to AGP bridge (virtual P2P) Hub link to PCI bridge Intel 82801DB ICH4 PCI to LPC bridge IDE controller SMBus controller AC ’97 audio controller AC ’97 modem controller (optional) -
Page 34: Interrupts
Intel Desktop Board D845PEMY Technical Product Specification 2.6 Interrupts The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH4 component. The PIC is supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is supported in Windows 2000 and Windows XP and supports a total of 24 interrupts. -
Page 35: Pci Interrupt Routing Map
PCI add-in card connect to one of these PIRQ signals. Some PCI interrupt sources are electrically tied together on the Desktop Board D845PEMY and therefore share the same interrupt. Table 15 shows an example of how the PIRQ signals are routed. -
Page 36: Pci Interrupt Routing Map
Intel Desktop Board D845PEMY Technical Product Specification Table 15. PCI Interrupt Routing Map ICH4 PIRQ Signal Name PCI Interrupt Source PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH AGP connector INTA INTB ICH4 USB UHCI controller 1 INTA SMBus controller... -
Page 37: Connectors
Technical Reference 2.8 Connectors CAUTION Only the back panel USB, front panel USB, VGA, and PS/2 connectors have overcurrent protection. The Desktop Boards’ internal connectors are not overcurrent protected and should connect only to devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer’s chassis. -
Page 38: Back Panel Connectors
Intel Desktop Board D845PEMY Technical Product Specification 2.8.1 Back Panel Connectors Figure 4 shows the location of the back panel connectors. The back panel connectors are color-coded in compliance with PC 99 recommendations. The figure legend below lists the colors used. -
Page 39: Internal I/O Connectors
Technical Reference INTEGRATOR’S NOTE The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output. 2.8.2 Internal I/O Connectors The internal I/O connectors are divided into the following functional groups: •... -
Page 40: Audio, Power, And Hardware Control Connectors
Intel Desktop Board D845PEMY Technical Product Specification 2.8.2.2 Audio, Power, and Hardware Control Connectors Figure 5 shows the location of the audio, power, and hardware control connectors. OM17289 Item Description For more information see: Front panel audio Table 16 +12 V power connector (ATX12V) -
Page 41: Front Panel Audio Connector
Technical Reference Table 16. Front Panel Audio Connector Signal Name Signal Name MIC_IN Ground MIC_BIAS +5 V RIGHT_OUT RIGHT_IN No connect LEFT_OUT LEFT_IN INTEGRATOR’S NOTES • Use only ATX12V-, SFX12V-, or TFX12V-compliant power supplies with this board. ATX12V, SFX12V, and TFX12V power supplies have an additional power lead that provides required supplemental power for the processor. -
Page 42: Main Power Connector
Intel Desktop Board D845PEMY Technical Product Specification Table 20. Main Power Connector Signal Name Signal Name +3.3 V +3.3 V +3.3 V -12 V Ground Ground +5 V PS-ON# (power supply remote on/off) Ground Ground +5 V Ground Ground Ground... -
Page 43: Add-In Board And Peripheral Interface Connectors
Add-in Board and Peripheral Interface Connectors Figure 6 shows the location of the add-in board connector and peripheral connectors for the Desktop Board D845PEMY. Note the following considerations for the PCI bus connectors: • All of the PCI bus connectors are bus master capable. -
Page 44: External I/O Connectors
Intel Desktop Board D845PEMY Technical Product Specification 2.8.3 External I/O Connectors Figure 7 shows the locations of the external I/O connectors. OM17291 Item Description For more information see: Serial Port B (optional) Table 23 Auxiliary front panel power/sleep LED Table 24... -
Page 45: Connection Diagram For Front Panel Connector
Technical Reference 2.8.3.1 Auxiliary Front Panel Power/Sleep LED Connector Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector. Table 24 lists the signal names of the Auxiliary Front Panel Power/Sleep LED connector. Table 24. -
Page 46: States For A One-Color Power Led
SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off. (The time requirement is due to internal debounce circuitry on the Desktop Board D845PEMY.) At least two seconds must pass before the power supply will recognize another on/off signal. -
Page 47: Connection Diagram For Front Panel Usb Connector
Technical Reference 2.8.3.3 Front Panel USB Connector Figure 9 is a connection diagram for the front panel USB connector. INTEGRATOR’S NOTES • The +5 V DC power on the USB connector is fused. • Pins 1, 3, 5, and 7 comprise one USB port. •... -
Page 48: Jumper Blocks
Intel Desktop Board D845PEMY Technical Product Specification 2.9 Jumper Blocks CAUTION Do not move any jumpers with the power on. Always turn off the power and unplug the power cord from the computer before changing a jumper setting. Otherwise, the Desktop Board could be damaged. -
Page 49: Bios Setup Configuration Jumper Block
Technical Reference Table 28 describes the two configurations of this connector/jumper block. CAUTION Do not place jumpers on this block in any configuration other than the one described in Table 28. Other jumper configurations are not supported and could damage the Desktop Board. Table 28. -
Page 50: Mechanical Considerations
Intel Desktop Board D845PEMY Technical Product Specification 2.10 Mechanical Considerations The Desktop Board D845PEMY is designed to fit into either a microATX or an ATX-form-factor chassis. Figure 11 illustrates the mechanical form factor for the Desktop Board. Dimensions are given in inches [millimeters]. The outer dimensions are 9.20 inches by 8.20 inches [233.68 millimeters by 208.28 millimeters]. -
Page 51: I/O Shield
Technical Reference 2.10.1 I/O Shield The back panel I/O shield for the Desktop Board D845PEMY must meet specific dimension and material requirements. Systems based on this Desktop Board need the back panel I/O shield to pass emissions (EMI) certification testing. Figure 12 shows the critical dimensions of the I/O shield. -
Page 52: Electrical Considerations
1.40 A 2.11.2 Add-in Board Considerations The Desktop Board D845PEMY is designed to provide 2 A (average) of +5 V current for each add- in board. The total +5 V current draw for add-in boards for a fully loaded Desktop Board D845PEMY (all four expansion slots filled) must not exceed 8 A. -
Page 53: Power Supply Considerations
System integrators should refer to the power usage values listed in Table 30 when selecting a power supply for use with the Desktop Board D845PEMY. Additional power required will depend on configurations chosen by the integrator. -
Page 54: Localized High Temperature Zones
Intel 82801DB ICH4 Figure 13. Localized High Temperature Zones Table 32 provides maximum case temperatures for Desktop Board D845PEMY components that are sensitive to thermal changes. The operating temperature, current load, or operating frequency could affect case temperatures. Maximum case temperatures are important when considering proper airflow to cool the Desktop Board D845PEMY. -
Page 55: Reliability
Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate repair rates and spare parts requirements. The MTBF data is calculated from predicted data at 55 ºC. The Desktop Board D845PEMY MTBF is 131566.83 hours. 2.14 Environmental Table 33 lists the environmental specifications for the Desktop Board D845PEMY. -
Page 56: Regulatory Compliance
This section describes the Desktop Boards’ compliance with U.S. and international safety and electromagnetic compatibility (EMC) regulations. 2.15.1 Safety Regulations Table 34 lists the safety regulations the Desktop Board D845PEMY complies with when correctly installed in a compatible host system. Table 34. -
Page 57: European Union Declaration Of Conformity Statement
Connect the equipment to a different electrical branch circuit from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the user’s authority to operate the equipment. 2.15.2.2 Canadian Compliance Statement This Class B digital apparatus complies with Canadian ICES-003. -
Page 58: Product Ecology Statements
2.15.4.2 Recycling Considerations Intel encourages its customers to recycle its products and their components (e.g., batteries, circuit boards, plastic enclosures, etc.) whenever possible. In the U.S., a list of recyclers in your area can be found at: http://www.eiae.org/... -
Page 59: Overview Of Bios Features
BIOS Security Features ....................65 3.1 Introduction The board uses an Intel/AMI BIOS that is stored in the Firmware Hub (FWH) and can be updated using a disk-based program. The FWH contains the BIOS Setup program, POST, the PCI auto- configuration utility, and Plug and Play support. -
Page 60: Bios Flash Memory Organization
Intel Desktop Board D845PEMY Technical Product Specification Table 37 lists the BIOS Setup program menu features. Table 37. BIOS Setup Program Menu Bar Maintenance Main Advanced Security Power Boot Exit Clears Allocates Configures Sets Configures Selects boot Saves or passwords and... -
Page 61: System Management Bios (Smbios)
Overview of BIOS Features to PIO Mode 3 or 4, depending on the capability of the drive. You can override the auto- configuration options by specifying manual configuration in the BIOS Setup program. To use ATA-66/100 features the following items are required: •... -
Page 62: Bios Updates
To install an operating system that supports USB, verify that Legacy USB support in the BIOS Setup program is set to Enabled and follow the operating system’s installation instructions. 3.6 BIOS Updates The BIOS can be updated using either of the following utilities, which are available on the Intel World Wide Web site: •... -
Page 63: Boot Options
Overview of BIOS Features NOTE If you add a custom splash screen, it will share space with the Intel branded logo. For information about Refer to The Intel World Wide Web site Section 1.3, page 14 3.7 Boot Options In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives, CD-ROM, or the network. -
Page 64: Fast Booting Systems With Intel Rapid Bios Boot
It is possible to optimize the boot process to the point where the system boots so quickly that the Intel logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives with minimum initialization times can also contribute to a boot time that might be so fast that necessary logo screens and POST messages cannot be seen. -
Page 65: Bios Security Features
Overview of BIOS Features 3.9 BIOS Security Features The BIOS includes security features that restrict access to the BIOS Setup program and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup program and for booting the computer, with the following restrictions: •... - Page 66 Intel Desktop Board D845PEMY Technical Product Specification...
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Page 67: Error Messages And Beep Codes
4 Error Messages and Beep Codes What This Chapter Contains BIOS Error Messages ....................67 Port 80h POST Codes ....................69 Bus Initialization Checkpoints ..................73 Speaker ........................74 BIOS Beep Codes......................74 4.1 BIOS Error Messages Table 41 lists the error messages and provides a brief description of each. Table 41. - Page 68 Intel Desktop Board D845PEMY Technical Product Specification Table 41. BIOS Error Messages (continued) Error Message Explanation Checking NVRAM..NVRAM is being checked to see if it is valid. Update OK! NVRAM was invalid and has been updated. Updated Failed NVRAM was invalid but was unable to be updated.
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Page 69: Port 80H Post Codes
F000:0000 in Shadow RAM and give control to recovery code in F000 Shadow RAM. Initialize interrupt vector tables, initialize system timer, initialize DMA controller and interrupt controller. Initialize extra (Intel Recovery) Module. Initialize floppy drive. Try to boot from floppy. If reading of boot sector is successful, give control to boot sector code. -
Page 70: Runtime Code Uncompressed In F000 Shadow Ram
Intel Desktop Board D845PEMY Technical Product Specification Table 44. Runtime Code Uncompressed in F000 Shadow RAM Code Description of POST Operation NMI is Disabled. To check soft reset/power-on. BIOS stack set. Going to disable cache if any. POST code to be uncompressed. - Page 71 Error Messages and Beep Codes Table 44. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation To prepare the descriptor tables. To enter in virtual mode for memory test. To enable interrupts for diagnostics mode. To initialize data to check memory wrap around at 0:0. Data initialized.
- Page 72 Intel Desktop Board D845PEMY Technical Product Specification Table 44. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation Lock-key checking over. To check for memory size mismatch with CMOS. Memory size check done. To display soft error and check for password or bypass setup.
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Page 73: Bus Initialization Checkpoints
Error Messages and Beep Codes Table 44. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in shadow. Going to copy any code to specific area. Copying of code to specific area done. -
Page 74: Speaker
A 47 Ω inductive speaker provides audible error code (beep code) information during POST. For information about Refer to The location of the onboard speaker on the Desktop Board D845PEMY Figure 1, on page 12 4.5 BIOS Beep Codes Whenever a recoverable error occurs during POST, the BIOS displays an error message describing the problem (see Table 48). -
Page 75: Beep Codes
Error Messages and Beep Codes If POST completes normally, the BIOS issues one short beep before passing control to the operating system. Table 48. Beep Codes Beep Description Refresh failure Parity cannot be reset First 64 KB memory failure Timer not operational Not used 8042 GateA20 cannot be toggled Exception interrupt error... - Page 76 Intel Desktop Board D845PEMY Technical Product Specification...
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