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Description
Electronic Component Model: KB3940Q A1 is an IC chip developed by ENE Technology Inc. It falls under the product category of IC chips. This chip offers various features including a low pin count host interface, support for IRQ1, IRQ12, SCI or SMI# interrupt, I/O address decoding, support for CLKRUN# as a slave device, and more. It also features an X-Bus bus interface for interfacing with ISA-type memory and I/O devices. The 8051 microprocessor included in this chip is industry 8051 instruction set compliant and offers a clock speed of 4/8/16 MHz. It also includes an 8042 keyboard controller, a PS/2 controller, and an internal keyboard encoder for optimized keyboard functionality.
Specifications and features
- Low Pin Count Host Interface (LPC)
- 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 to access internal registers
- One Programmable I/O write byte-address decoding (for example, it can be used to decode Port_80h)
- Support CLKRUN# as a slave device
- X-Bus Bus Interface (XBI)
- Interfaces to ISA-Type memory and I/O devices
- Addressable memory range up to 2MB
- The 64K code memory of 8051 can be mapped onto 2 independent 16KB pages
- 2 SELIO# for expended IO (XIO) by directly connecting to TTL (74373, 74244)
- 8051 Microprocessor
- Industry 8051 Instruction set compliant 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
- 8 Standard keyboard commands processed by hardware
- Each hardware command can be optionally processed by firmware
- PS/2 Controller
- External PS/2 device operation in firmware mode operation (no hardware mode available)
- Support three external PS/2 devices
- Optimized hardware for firmware processing
- Internal Keyboard Encoder (IKB)
- 18x8 keyboard scan matrix
- Optimized hardware for firmware processing
- Support W2K Internet / multimedia keys
- Support hot-key events
- Ghost key phenomenon cancellation (Continue ...)
Application Scenarios
The KB3940Q A1 IC chip can be used in various electronic devices and systems. It is suitable for applications that require a low pin count host interface, support for different types of interrupts, I/O address decoding, interfacing with ISA-type memory and I/O devices, and keyboard control functionalities. It is commonly used in electronic devices such as keyboards, laptops, desktop computers, and embedded systems.
Comparison
Advantages- Low pin count host interface allows for easy integration with different systems
- Support for different types of interrupts ensures compatibility with various devices and systems
- I/O address decoding simplifies the communication with internal registers
- Support for CLKRUN# as a slave device offers flexibility in system design
- X-Bus bus interface enables seamless integration with ISA-type memory and I/O devices
- 8051 microprocessor with industry 8051 instruction set compliance provides efficient processing
- Optimized keyboard control functionalities for enhanced user experience
Disadvantages- No hardware mode available for external PS/2 device operation, limiting compatibility with certain devices
- Ghost key phenomenon cancellation may not be completely effective in all scenarios
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Similar parts: 430483 , Click to view
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Datasheet
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Popular parts of the same kind
- Datasheet: Download KB3940Q A1
- Chipdatas Part: CD88-KB3940Q A1
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/10/02 14:39 +0800
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