It8995e 128 Datasheet ((exclusive)) -

The is a highly integrated, high-performance Embedded Controller (EC) and Keyboard Controller (KBC) designed by ITE Technology Inc. . This integrated circuit (IC) is a staple component in modern notebook motherboards, managing core low-level system functions.

: Widely encountered as IT8995E-128 CX , with variant suffixes like CXA, CXS, and DXA .

Controls fan speeds and monitors temperature sensors. it8995e 128 datasheet

: Modern iterations often use an internal oscillator, but some circuit designs rely on an external 32.768 kHz crystal connected to designated XTAL pins. 3. Power Management & Handshaking

When troubleshooting a motherboard using the IT8995E-128, engineers focus on several critical signal pins: Description 3.3V3.3 cap V Standby power rail required for the IC to boot. WRST# / EC_RST# Hardware reset signal; must be high ( 3.3V3.3 cap V ) for operation. NBSWON# / PWR_SW# Power button trigger input; drops to when pressed. DNBSWON# : Widely encountered as IT8995E-128 CX , with

: Features 128 KB of embedded flash memory (indicated by the "-128" suffix) for firmware storage.

Using specialized hardware programmers (such as the SVOD, Vertyanov, or RT809H), technicians connect to the chip via the laptop's physical keyboard ribbon connector. This allows reading and writing the EC firmware without desoldering the chip. handling low-level tasks like power management

These chips are almost exclusively found on . They act as the "brain" behind the main CPU, handling low-level tasks like power management, keyboard scanning, and fan control.

The IT8995E-128 is configured via LPC bus I/O mapping. The base address (default 0x2E/0x2F) is set by the BIOS. Key configuration registers include: