it8995e 128 datasheet

The IT8995E-128 communicates directly with the Southbridge, PCH (Platform Controller Hub), or CPU SoC using standard ACPI states:

Translates key presses into standard PS/2 or HID scan codes for the OS. 3. Thermal and Fan Management Monitors thermal diodes spread across the CPU and GPU.

Fans spin at 100% continuously, or do not spin at all, leading to rapid CPU overheating. Diagnostic Steps

As a specialized system manager, the IT8995E-128 handles tasks independent of the main operating system or primary CPU processor. 1. System Power Sequencing

The IT8995E-128 is a suitable Super I/O for embedded systems requiring legacy port support and hardware monitoring. Its 128-pin LQFP package balances integration and PCB area. Designers must follow the configuration sequence and electrical limits outlined in the official datasheet.

Multiple independent master/slave channels to communicate with the smart battery charger, thermal sensors, and RAM SPD.

The is a high-performance Embedded Controller (EC) and Keyboard Controller (KBC) integrated circuit (IC) manufactured by ITE Tech. Inc. . It is a critical component commonly found in notebook motherboards, specifically used for managing essential low-level hardware functions and power sequencing. Key Technical Specifications

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

, to manage low-level power sequences and interface functions. Key Specifications Package Type : QFP-128 (128 pins). : Features 128KB e-Flash for internal programming. : Common suffixes include Application

| 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 EC asserts PM_PWRBTN# to the Intel/AMD chipset.

One of the most important takeaways for repair technicians looking up the IT8995E-128 datasheet is its firmware dependence.

logo