APPENDIX

B. Interrupt Request Lines (IRQ)

Peripheral devices use interrupt request lines to notify CPU for the service required. The following table shows the IRQ used by the devices on board.

 

Level

 

 

Function

 

 

IRQ0

 

System Timer Output

 

 

IRQ1

 

 

Keyboard

 

 

IRQ2

 

Interrupt Cascade

 

 

IRQ3

 

Serial Port #2

 

 

IRQ4

 

Serial Port #1

 

 

IRQ5

 

Reserved

 

 

IRQ6

 

Floppy Disk Controller

 

 

IRQ7

 

Parallel Port #1

 

 

IRQ8

 

Real Time Clock

 

 

IRQ9

 

Reserved

 

 

IRQ10

 

Reserved

 

 

IRQ11

 

Reserved

 

 

IRQ12

 

PS/2 Mouse

 

 

IRQ13

 

80287

 

 

IRQ14

 

Primary IDE

 

 

IRQ15

 

Secondary IDE

 

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MB899 User’s Manual

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Intel MB899 user manual Interrupt Request Lines IRQ, Level Function

MB899 specifications

The Intel MB899 is a sophisticated microcontroller unit designed primarily for automotive applications and industrial control systems. This versatile device is a part of Intel's broader strategy to provide robust and scalable solutions that cater to the demanding requirements of modern electronic systems. Featuring a mix of performance, power efficiency, and comprehensive connectivity options, the MB899 is well-suited for a variety of applications.

One of the standout features of the Intel MB899 is its powerful 32-bit RISC architecture, which allows for high-speed processing and efficient execution of complex algorithms. This architecture ensures that the microcontroller can handle intensive tasks with ease, making it ideal for applications such as engine control units and advanced driver-assistance systems.

The MB899 is equipped with an array of integrated peripherals, including ADCs (Analog-to-Digital Converters), multiple timers, and interfaces like CAN (Controller Area Network), LIN (Local Interconnect Network), and SPI (Serial Peripheral Interface). This extensive set of functionalities enables seamless communication and control in automotive environments, where real-time data handling is crucial.

Energy efficiency is a significant consideration in the design of the MB899. The microcontroller incorporates power-saving features that help reduce overall power consumption, making it suitable for battery-operated systems and applications where energy efficiency is critical. These features are especially important in vehicles, where reducing power draw can lead to improved fuel efficiency.

Another important characteristic of the Intel MB899 is its reliability and ruggedness. Designed to endure harsh environments, the microcontroller can operate in a wide temperature range and withstand vibrations and electromagnetic interference. This robustness makes it suitable for use in critical applications, where failure is not an option.

Moreover, the MB899 benefits from Intel’s commitment to security. With integrated security features, the microcontroller can support secure boot processes and protect against unauthorized access, thus ensuring the integrity of the applications running on it. This aspect is increasingly important in the context of connected vehicles and IoT devices, which are frequently targeted by cyber threats.

Overall, the Intel MB899 microcontroller stands out for its powerful performance, extensive connectivity options, energy efficiency, reliability, and security features. These traits make it an exceptional choice for automotive and industrial applications, reinforcing Intel's position in the competitive landscape of microcontroller technology.