: Built around an embedded RISC architecture or an enhanced 8051 core capable of executing complex power-sequencing firmware.
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This article is based on publicly available information from component distributors, laptop repair forums, and hardware analysis. It is . Always refer to original manufacturer sources where available, and exercise caution when replacing or reprogramming sensitive embedded controllers. The author and publisher assume no responsibility for damage resulting from the use of this information.
Tells the PCH that standby power is stable. it8995e 128 datasheet
: Output from the EC to the PCH, mirroring the power button press to wake the chipset.
Unlike older, fixed-function Super I/O chips, the IT8995E-128 is fully . This means its behavior is determined entirely by the firmware flashed onto it.
If you are searching for the term you are likely working with a modern laptop motherboard—probably from ASUS—and you need to understand the embedded controller (EC) at its heart. The ITE IT8995E-128 is a high‑performance, programmable Super I/O (SIO) and Embedded Controller chip that acts as the “command center” for core system functions, from power sequencing to keyboard control and thermal management. However, unlike many common chips, the full IT8995E-128 datasheet is not publicly released by the manufacturer . This guide consolidates all publicly available, verified information from repair forums, product listings, and hardware teardowns to serve as a practical reference for technicians, engineers, and enthusiasts. : Built around an embedded RISC architecture or
Technicians use specialized hardware programmers (such as the SVOD, RT809H, or Vertyanov JIG programmer) connected directly to the motherboard's keyboard matrix connector via a ribbon cable.
| 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 |
When diagnosing a dead motherboard containing the IT8995E-128, tracking its internal state machine lifecycle is crucial. The chip operates across distinct checkpoints: : Output from the EC to the PCH,
Keyboard Scan Inputs and Keyboard Scan Outputs for the key matrix. SMCLK0/SMDAT0, SMCLK1/SMDAT1
Supports a wide range of I/O options and communication protocols to interface with sensors, peripherals, and control systems. Datasheet Resources
Through the Smart Battery System (SBS) protocol, the chip communicates directly with the internal battery pack's fuel gauge IC over an I2C/SMBus channel. It regulates charge current safety parameters, dictates charging profiles, and handles Over-Current Protection (OCP) and Over-Voltage Protection (OVP) boundaries. Pinout and Connection Architecture
The 128KB EC bin file must be extracted from a working motherboard dump or isolated from the manufacturer’s official BIOS update capsule.