The KB926QF is a 128-pin embedded I/O controller with an 8051 microprocessor and LPC interface, primarily used in notebook platforms for keyboard and system management. It features a shared-ROM architecture supporting SPI flash and operates in environments ranging from -40∘Cnegative 40 raised to the composed with power C 105∘C105 raised to the composed with power C
. Detailed technical specifications and pinout diagrams are available at DatasheetCafe. KB926QF PDF Datasheet ( Pinout ) - I/O Controller - ENE
The ENE KB926QF is a highly integrated Embedded Controller (EC) specifically designed for notebook and laptop platforms. It acts as the "Keyboard Controller" (KBC) and manages critical low-level system functions. Key Technical Functions
According to the KB926QF Implementation Overview and technical notes from Yashan, this chip handles the following:
Power Sequencing: It is responsible for the system's trigger mechanism before the power button is even pressed. It must receive stable power (often referred to as EC_AVCC) and a 32.768 kHz clock to initialize the system. Integrated Peripherals:
8051 MCU Core: The internal processing unit for control logic. kb926qf datasheet
LPC Interface: Connects to the chipset (PCH/Southbridge) for communication.
Keyboard Matrix Encoder: Directly manages the laptop’s physical keyboard. Interfaces: Includes PS/2, SMBus, SPI, and GPIO pins.
Hardware Monitoring: Fan control via PWM and thermal management through A/D converters. Physical & Product Variations
Package Type: Typically found in a 128-pin QFP (Quad Flat Package) format.
Common Revisions: You may encounter different versions such as KB926QF-A1, B1, C0, C1, D2, D3, and E0. These are often listed as "IO Chipsets" or "Multicontrollers" on electronics supply sites like Jotrin Electronics and Atom Bilgisayar. Common Implementation Details The KB926QF is a 128-pin embedded I/O controller
Reset Logic: The Power-On Reset (POR#) occurs after the clock is stable, ensuring the chip starts in a known state.
Voltage Support: It requires specific analog and digital power sections to be active for proper system triggering.
Where to find the full datasheet:Official full datasheets for ENE chips are often restricted to registered OEMs. However, partial documentation, pinouts, and implementation guides can be found on sites like The Datasheet Archive and Scribd. ENE KB926QF D3 Search Results - The Datasheet Archive
The KB926QF is a highly integrated Embedded Controller (EC) , commonly found in laptops (Acer, Lenovo, etc.). Since a full datasheet is proprietary (NDA-protected), here are the most useful public features to look for when you find a copy:
A common failure point in these chips is voltage irregularity. According to typical specifications: Pinout : Check the pin diagram and table
0xFF0000 – boot vector).Searching for the KB926QF datasheet often stems from one of three scenarios:
Without the datasheet, the chip becomes a black box. With it, you gain access to:
The KB926QF datasheet is copyrighted by ITE Tech. Redistribution of full proprietary datasheets is not permitted here. If you need specific technical parameters (pinout, register addresses, power sequencing), please ask and I can summarize them from memory or from open references. For register-level programming, you will need the original ITE document.
Would you like me to instead provide:
