Description

ENE Technology Inc. has developed the KB3926QFB1 model, an electronic component belonging to the IC Chips category. This model offers a wide range of features, including a Low Pin Count Host Interface (LPC) with support for multiple IRQ interrupt options, I/O Address Decoding, flexible programmable I/O ports, and compatibility with CLKRUN# as a slave device. It also includes an X-Bus Bus Interface (XBI) for easy connection to ISA-Type memory and I/O devices, with an addressable memory range of up to 2MB. The 8051 Microprocessor of the KB3926QFB1 provides industry-standard instruction set compliance, fast instruction fetching, and extensive interrupt and timer capabilities. Additionally, it features an 8042 Keyboard Controller, a PS/2 Controller for firmware mode operation, and an Internal Keyboard Encoder (IKB) with various functionalities such as keyboard scan matrix, support for multimedia keys, and ghost key phenomenon cancellation.

Specifications and features

• Low Pin Count Host Interface (LPC) with SIRQ supporting IRQ1, IRQ12, SCI or SMI# interrupt
• I/O Address Decoding: KBC IO Port 60h/64h, Programmable EC IO Port 62h/66h, Programmable 4-byte Index I/O ports
• One Programmable I/O write byte-address decoding (e.g., decoding Port_80h)
• Support CLKRUN# as a slave device
• X-Bus Bus Interface (XBI) for interfaces to ISA-Type memory and I/O devices
• Addressable memory range up to 2MB
• 64K code memory of 8051 mapped onto 2 independent 16KB pages
• 2 SELIO# for expanded IO (XIO) by directly connecting to TTL (74373, 74244)
• 8051 Microprocessor compliant with industry 8051 Instruction set with 3~5 cycles per instruction
• Programmable 4/8/16 MHz clock
• Fast instruction fetching from XBI Interface
• 128 bytes and 2KB tightly-coupled SRAM
• Twenty-four extended interrupt sources
• Two 16-bit tightly-coupled Timers
• 8042 Keyboard Controller with 8 Standard keyboard commands processed by hardware
• PS/2 Controller for external PS/2 device operation in firmware mode
• Support for three external PS/2 devices
• Optimized hardware for firmware processing
• Internal Keyboard Encoder (IKB) with an 18x8 keyboard scan matrix
• Support for W2K Internet / multimedia keys and hot-key events
• Ghost key phenomenon cancellation

Application Scenarios

The KB3926QFB1 model is a versatile electronic component suitable for various applications. It can be used in devices that require low pin count host interfaces, such as embedded systems, industrial control systems, and consumer electronics. The X-Bus Bus Interface makes it compatible with ISA-Type memory and I/O devices, expanding its application possibilities to include computer peripherals, gaming consoles, and communication devices. The 8051 Microprocessor and keyboard controller functionalities are ideal for devices that require reliable and efficient keyboard input processing, such as keyboards, keypads, and input devices for automation systems.

Comparison

• Flexible Low Pin Count Host Interface with multiple IRQ options
• Addressable memory range up to 2MB
• Support for external PS/2 devices in firmware mode
• Optimized hardware for firmware processing
• Extensive keyboard processing capabilities with ghost key cancellation

• No hardware mode available for PS/2 Controller