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.
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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: kb926qf datasheet
Enthusiasts building DOS-compatible systems using modern LPC-to-ISA bridges integrate Super I/O chips like the KB926QF to retain floppy and parallel port support.
A schematic excerpt from a motherboard design might show the KB926QF connected as follows: Debounce, repeat rate, scan order, and protocol selection
The datasheet provides specific recommendations for pull-up resistors, decoupling capacitors (typically 0.1µF near each power pin), and PCB layout guidelines to minimize LPC bus skew.
Many industrial single-board computers (SBCs) with PCI or ISA slots rely on the KB926QF to provide COM ports for PLCs (Programmable Logic Controllers) and serial barcode scanners. The KB926QF datasheet is copyrighted by ITE Tech
Older POS terminals use PS/2 keyboards and parallel receipt printers. The KB926QF handles these interfaces while the chipset focuses on graphics and networking.
Perhaps the most valuable section of the KB926QF datasheet for firmware developers is the register map. The chip is configured via the LPC bus using indexed I/O ports. Typically, the Super I/O uses two base addresses:
By writing specific sequences to these ports, you can enable or disable logical devices (UARTs, parallel port, FDC, etc.), assign IRQ and DMA channels, and set GPIO directions.