It8995e 128 Datasheet Page

These pins connect to the motherboard’s LPC bus or PCH (Platform Controller Hub).

| Pin | Signal | Description | |------|--------|-------------| | 1 | LCLK | 33 MHz clock from PCH | | 2 | LFRAME# | Frame signal for cycle start/end | | 3 | LRST# | LPC reset (active low) | | 4 | LAD0 | Multiplexed address/data line 0 | | 5 | LAD1 | Multiplexed address/data line 1 | | 6 | LAD2 | Multiplexed address/data line 2 | | 7 | LAD3 | Multiplexed address/data line 3 | | 8 | LDRQ# | DMA request line | | 9–12 | GND | Digital ground |

  • Sample Configuration Register (CR_24 – Power Management):

    • The IT8995E-128 is a versatile and rugged Super I/O controller that remains relevant for new designs requiring legacy interface support with modern power management. Its LQFP-128 packaging balances pin count and PCB space, making it ideal for embedded systems, thin clients, and industrial motherboards. The official datasheet is indispensable for configuring GPIO mapping, fan curves, and LPC bus timing.

    Whether you are a BIOS engineer, a hardware hacker, or a repair technician, understanding the IT8995E-128 datasheet unlocks the full potential of this chip—from controlling external peripherals to monitoring system health.

    References:

    Article last updated: May 2026. For the latest revision of the IT8995E-128 datasheet, refer to ITE’s official product change notifications.

    ITE IT8995E-128 is a specialized Keyboard Controller (KBC) or "multi-controller" primarily used in laptop motherboards (such as the ASUS X543U) to manage low-level system functions. While a single consolidated datasheet is notoriously difficult to find publicly, it belongs to a family of ITE chips known for their robustness in enterprise and personal electronics. Key Specifications & Features

    Based on technical listings and repair community reports, the IT8995E-128 includes several critical safeguards: Package Type : QFP-128 (Quad Flat Package with 128 pins). Protection Mechanisms : Features built-in Electrostatic Discharge (ESD) protection and overheating safeguards to prevent failure during manufacturing and use. Compliance RoHS compliant

    , meeting international standards for lead-free electronic components. Common Variants : You may encounter specific versions like the IT8995E-128/CXA , which are often found in modern portable systems. IC Components Technical Application

    This chip acts as the "brain" for hardware management before and after the main OS boots: Power Management

    : Controls the power-on sequence and battery charging cycles. Thermal Control : Manages fan speeds and monitors system temperatures. Input/Output

    : Handles the laptop keyboard, touchpad, and various system LEDs.

    If you are troubleshooting a laptop motherboard with an IT8995E:

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    Availability of Datasheet

    The datasheet for the IT8295E chip is available from the manufacturer's website or through authorized distributors. The datasheet provides detailed information on the chip's features, specifications, and application notes, which can be useful for designers and engineers developing products based on this chip.

    Deep Dive: Deciphering the ITE IT8995E-128 Datasheet If you’ve ever cracked open a modern notebook—especially an ASUS or similar laptop—you’ve likely spotted a square, multi-legged chip labeled ITE IT8995E-128. For repair technicians and hardware enthusiasts, this "Super I/O" or Embedded Controller (EC) is the gatekeeper of the motherboard.

    Below is a breakdown of what the technical documentation reveals about this powerhouse component. 1. What Exactly is the IT8995E-128?

    The IT8995E-128 is a highly integrated Embedded Controller (EC) and Keyboard Controller (KBC). It is essentially a mini-computer on your motherboard that manages the low-level functions that the main CPU is too "important" to handle.

    Package: Industrial LQFP-128 (Low-profile Quad Flat Package), meaning it has 128 pins—32 on each side.

    Memory: Features 128KB of internal eFlash (programmable memory) to store its unique firmware. 2. Key Responsibilities (The "Hidden" Manager)

    While the CPU handles your operating system, the IT8995E-128 manages the physical reality of the machine:

    Power Sequencing: It decides when to turn on different power rails when you hit the power button.

    Thermal Management: Monitoring temperature sensors and adjusting fan speeds to prevent your laptop from melting.

    Input Handling: Managing the keyboard matrix and touchpad signals.

    Battery Management: Communicating with the battery to handle charging cycles and reporting health data. 3. The "Firmware" Catch

    One of the most critical takeaways from the technical specs is that this chip is programmable.

    Automatic Sync: In some designs, the chip can automatically "pull" its required software from the main BIOS.

    Manual Programming: If the system doesn't start after a chip replacement, it often requires manual flashing via the I2C interface or the keyboard connector using a specialized programmer. This is why simply swapping the hardware isn't always enough for a successful repair. 4. Compatibility and Revisions

    In motherboard schematics, you might see variations like CXA or CXS. Generally, these revisions are cross-compatible during repairs. The chip also includes modern safety standards like RoHS compliance, built-in electrostatic discharge (ESD) protection, and overheating safeguards to ensure a long product lifecycle. Summary Table: Quick Specs Specification Manufacturer ITE Tech Pins 128-pin LQFP Flash Memory 128 KB eFlash Primary Roles Power sequencing, KBC, Thermal control, Battery Mgmt Interface LPC, I2C, SPI IT8995E-128/CXA ITE - IC Components

    IT8995E-128 highly integrated Embedded Controller (EC) and Super I/O (SIO) chipset manufactured by

    . It is primarily used in laptop motherboards, including high-performance models like the Apple MacBook Pro, to manage low-level system functions such as power sequencing, keyboard control, and environmental monitoring. WIT Computers Key Technical Specifications Manufacturer: ITE Tech (ITE Technologies Inc.) Package Type: Housed in a (Quad Flat Package) with 128 pins. Internal Storage: 128kb of e-Flash Programmability: The chipset must be programmed

    after soldering onto a motherboard if it does not auto-program via the BIOS. Common versions include

    . These are often interchangeable if the motherboard schematic specifies "IT8995E-128 CX" or "DX". Chipset Elektronik Core Functions & Applications System Management:

    Acts as a Power IC/SIO controller to manage power-on sequences and hardware monitoring in personal electronics and enterprise systems. Embedded Systems: These pins connect to the motherboard’s LPC bus

    Designed for industrial automation and advanced computing modules where continuous, dependable operation is required. Motherboard Integration:

    Frequently found in laptop repair contexts (e.g., Apple MacBook Pro A1286) as a critical component for restoring normal machine operation after power-related failures. Zeus Mining Reference Resources

    For detailed pinouts and electrical characteristics, you can refer to technical distributors and documentation platforms: Worldway Electronics for general category and application details. IC Components for package and thermal property information.

    often hosts community-uploaded PDF datasheets and motherboard schematics. IC Components

    If you are performing a repair, would you like to know about compatible programmers or specific motherboard schematics where this chip is commonly found? AI responses may include mistakes. Learn more It8995e 128 | PDF - Scribd

    IT8995E-128 is a specialized integrated circuit (IC) manufactured by ITE Tech. Inc. , primarily utilized as an Embedded Controller (EC)

    or "Super I/O" chip in laptops and complex embedded systems. It is often responsible for low-level hardware management, such as power sequencing, keyboard control, and thermal monitoring. IC Components Core Overview Manufacturer: ITE Tech. Inc. Package Type:

    (128-pin Quad Flat Package). This high pin count allows for extensive peripheral management and simultaneous interface connections. Applications:

    Commonly found in communications equipment, enterprise systems, and personal electronics (specifically laptop motherboards). IC Components Key Features & Functionality

    Based on its category as an embedded controller, the IT8995E-128 typically handles the following operations: Power Management:

    Manages power-on/off sequencing and charging logic (often paired with specialized charging ICs). Interface Management:

    Acts as a bridge for various I/O operations, consolidating multiple control functions into a single chip to reduce board space. System Monitoring:

    Monitors system vitals like temperature and fan speeds to ensure hardware reliability. Keyboard & Touchpad Control:

    Often serves as the primary controller for built-in input devices in notebook computers. IC Components Technical Specifications (Estimated) Compliance: Generally lead-free and RoHS compliant. Interchangeability: In repair communities (like

    ), this chip is noted for specific version compatibility; suffixes like "CXA" indicate specific firmware or hardware revisions. IC Components Repair & Replacement

    Because the IT8995E-128 is a "Power IC" or Multi-I/O chip, its failure can lead to a device not powering on or specific ports (like the keyboard) failing. Technicians often use specialized programmers, such as the Vertyanov Successor

    , to read or write the internal firmware needed for the chip to communicate with a specific motherboard. Zeus Mining IT8995E-128/CXA ITE - IC Components

    The IT8995E-128 is a high-performance Embedded Controller (EC) and Keyboard Controller (KBC) integrated circuit (IC) developed by ITE Technology. It is primarily found in notebook and laptop motherboards, serving as a critical "Super I/O" chip that manages low-level system functions. Key Specifications & Features

    The IT8995E-128 is designed with a specific focus on low power consumption and high integration to reduce the physical footprint on a motherboard.

    Package Type: LQFP-128 (Low-profile Quad Flat Package with 128 pins).

    Memory: Includes 128KB of internal programmable eFlash (Embedded Flash). Interfaces Supported: LPC (Low Pin Count) interface. SMBus/I2C for communication with peripheral devices. PS/2 for legacy keyboard and mouse support. Sample Configuration Register (CR_24 – Power Management):

    GPIO (General Purpose Input/Output) for various system signals.

    Safety Features: Built-in electrostatic discharge (ESD) protection and overheating safeguards. Primary Functions in Laptops

    As an embedded controller, the IT8995E-128 acts as the "manager" for several essential hardware tasks:

    Power Sequencing: Controlling the power-on and power-off cycles of the motherboard.

    Keyboard & Touchpad Control: Processing signals from the user's input devices.

    Battery Management: Monitoring charge levels and managing charging circuits.

    Thermal Monitoring: Regulating fan speeds based on temperature sensor data. Programming and Compatibility

    One of the most important aspects for repair technicians is that the IT8995E-128 must be programmed for the specific motherboard model it is being installed on.

    Firmware Synchronization: While it may sometimes auto-sync from the main BIOS, it often requires manual programming via the I2C or keyboard connector interface to initiate the system cycle.

    Version Interchangeability: Revisions like CXA, CXS, DXA, and DXS are often interchangeable depending on the specific motherboard schematic. For example, the IT8995E-128/DX model often allows for both DXA and DXS variants.

    Application Examples: This IC is commonly used in Asus motherboards, such as the Asus X407UB Rev 2.0. Repair & Installation Tips

    If you are replacing this chip, specialized equipment and skills are required:

    Soldering: High-level soldering skills are needed due to the 128-pin high-density layout.

    Programming Tools: Technicians typically use a dedicated programmer (like the RT809H or SVOD) to flash the 128KB eFlash with the correct .bin file before or after soldering.

    Diagnostic Indicators: Faulty controllers often lead to "no power" issues, dead batteries not charging, or unresponsive keyboards. Go to product viewer dialog for this item.

    Ite It8995e-128-dxa It8995e 128 Dxa Tqfp Ec Power Ic Chip Chipset

    | Pin # | Name | Type | Function | |-------|------|------|----------| | 1 | LAD0 | I/O | LPC address/data line 0 | | 2 | LAD1 | I/O | LPC address/data line 1 | | ... | ... | ... | ... | | 64 | VCC | PWR | 3.3V supply | | 128 | GND | PWR | Ground |

    (Include full pinout table from datasheet, marking power, ground, LPC, GPIO, serial, parallel, h/w monitor pins)

    A responsible engineer must check the "Absolute Maximum Ratings" section in the official datasheet. Based on ITE’s typical specs:

    Power Sequencing Warning: The IT8995E 128 requires VTR (standby voltage) before the main VDD. If your motherboard shows no standby current, the EC is likely dead or not receiving its 3.3V standby rail.

    Prepared for: [Course/Project Name]
    Date: [Current Date]
    Source: Based on ITE IT8995E-128 Datasheet (preliminary/final revision X.X)

    Most pins on the IT8995E-128 are multi-function. The datasheet defines a register map to select between GPIO, UART, fan control, or ADC input.

    Common alternate functions: