Integrated Analog-to-Digital Converters (ADCs) continuously sample temperature sensor outputs across the board layout. Pulse Width Modulation (PWM) channels drive cooling fan circuits dynamically, altering fan duty cycles based on real-time operational thermal loads. Firmware Programming and Refurbishing Workflows
High-speed communication with the main processor chipset.
The data suggests there are two physical variants of this controller. The QFN-40 (6x6mm) variant likely contains only the USB Power Delivery controller and power management IC, while the TQFP-128 variant is the full-featured Embedded Controller found on most motherboards. The "128" in the name often refers to the pin count of the larger package.
The IT8995E‑128 is heavily used in from the mid‑2010s to early 2020s. Based on repair logs and motherboard component lists, here are confirmed models that contain this EC:
Equipped with dedicated driving matrices, the chip scans multi-row and multi-column hardware keyboard arrays directly. It decodes matrix intersections natively and translates raw tactile inputs into standard PS/2 or USB-hid scancodes forwarded to the CPU host controller. 3. Thermal Subsystems and Hardware Monitoring
LPC bus reset signal coming from the chipset, synchronizing communication. Programming and Firmware Corruption
Laptops from major brands (Dell, Lenovo, Acer) frequently use the IT8995E as the embedded controller. Symptoms of failure include:
The includes a reference design for a typical motherboard. Below is a simplified schematic partial: