It8995e 128 Datasheet !!top!! -

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.

If you are repairing a board featuring this IC, use this quick-test matrix to locate faults: Probable Cause Diagnostic Checkpoint Missing LDO voltage or shorted capacitor.

Commonly observed markings include:

It is important to clarify that the is not a standard general-purpose microcontroller (like an STM32 or PIC). Instead, it is a specialized Embedded Controller (EC) and Super I/O chip manufactured by ITE Tech Inc. (ITE). it8995e 128 datasheet

Contains an internal microcontroller core (often based on an 8051 or RISC architecture) running proprietary firmware stored in an onboard or external SPI flash memory chip.

| Pin Group | Pins | Description | |-----------|------|-------------| | VCC (3.3V) | 22, 45, 78, 101 | Main digital power | | VCC_RTC | 32 | Real-time clock backup (2.0V–3.3V) | | VBAT | 33 | Battery backup for CMOS RAM | | XIN / XOUT | 88, 89 | 32.768 kHz crystal input/output | | VSS (GND) | 11, 30, 55, 72, 95, 120 | Multiple grounds for noise reduction |

. 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 Most pins on the IT8995E-128 are multi-function

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

The IT8995E-128 has a unique relationship with the main system BIOS. A modern laptop contains two separate flash memory chips:

: CXA and CXS revisions are generally considered interchangeable in motherboard schematics. Quality & Safety Features Compliance : RoHS compliant for hazardous materials. Commonly observed markings include: It is important to

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Supports various system wake-up functions for power management. Technical Details Manufacturer ITE Tech. Inc. Interface Typically interfaces via LPC or eSPI bus Operating Voltage Generally supports 1.8V / 3.3V logic (standard for ITE ECs) Programmability

: The internal oscillator stabilizes, or an external 32.768 kHz crystal begins oscillating.

When diagnosing a dead motherboard containing the IT8995E-128, tracking its internal state machine lifecycle is crucial. The chip operates across distinct checkpoints: