It8995e 128 Datasheet Link Jun 2026

| Register Offset | Name | Description | |----------------|------|-------------| | 0x07 | Logical Device Number | Select active device (UART, LPT, GPIO, etc.) | | 0x21 | GPIO Direction | 0 = input, 1 = output | | 0x22 | GPIO Polarity Inversion | 1 = invert input | | 0x24 | GPIO Pull-up Enable | Internal 100kΩ pull-up | | 0x60–0x67 | Base Address Registers | I/O base for UART/LPT | | 0x70 | Interrupt Select | IRQ mapping (3,4,5,7,9,10,11,12) | | 0x71 | Fan Tachometer Divisor | Sets measurement range |

The IT8995E-128 is a critical embedded controller in modern laptop design, providing robust power management, peripheral control, and thermal protection in a compact 128-pin package. For hardware engineers designing portable devices, its 128KB flash and extensive I/O offer great flexibility. For repair professionals, ensuring high-quality IT8995E-128/CXA components and proper firmware programming is vital for restoring laptop functionality.

Because this is a specialized component often sold under Non-Disclosure Agreements (NDAs) to Original Design Manufacturers (ODMs) like Lenovo, HP, Dell, and ASUS, a full public datasheet is rarely available. it8995e 128 datasheet

: Manages system power sequencing and battery charge management.

The IT8995E-128 belongs to a large family of ITE embedded controllers. Understanding its position in the product lineup helps in selecting replacements. | Register Offset | Name | Description |

Standby power inputs (typically 3.3V) that keep the chip alive during sleep or off states.

The IT8995E-128 is a highly integrated and versatile embedded controller that offers a rich set of peripherals, low power consumption, and a compact package. Its robust design and wide operating temperature range make it suitable for harsh industrial environments. With its ARM Cortex-M4 core and ample memory, the IT8995E-128 is an ideal choice for a wide range of applications, from industrial control and automation to IoT devices. Because this is a specialized component often sold

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

When the chip is blank or corrupted, it is programmed through dedicated pins, often mapped directly to the keyboard matrix connector (KSI/KSO lines) on the motherboard: Serial Clock for SPI/In-System Programming. EDI_DO: Data Output from the EC. EDI_DI: Data Input to the EC. EDI_CS#: Chip Select (Active Low). Typical Power-Up Sequence

eSPI (Enhanced Serial Peripheral Interface) or LPC (Low Pin Count) bus to communicate with the Central Processing Unit (CPU) or Platform Controller Hub (PCH).

Ensure that pressing the power button drops the voltage on the input pin from 3.3V to 0V, and check if PM_PWRBTN# replicates this drop toward the PCH. 5. Firmware Programming and Flashing