8XC196NP, 80C196NU USER’S MANUAL

ISR

See interrupt service routine.

LONG-INTEGER

A 32-bit, signed variable with values from –2 31

 

through +231–1.

LSB

Least-significant bit of a byte or least-significant byte

 

of a word.

MAC

See multiply-accumulate.

maskable interrupts

All interrupts except unimplemented opcode,

 

software trap, and NMI. Maskable interrupts can be

 

disabled (masked) by the individual mask bits in the

 

interrupt mask registers, and their servicing can be

 

disabled by the global interrupt enable bit. Each

 

maskable interrupt can be assigned to the PTS for

 

processing.

MSB

Most-significant bit of a byte or most-significant byte

 

of a word.

multiplexed bus

The configuration in which the device uses both

 

A19:0 and AD15:0 for address and also uses AD15:0

 

for data. See also demultiplexed bus.

multiply-accumulate

An operation performed by the 8XC196NU’s

 

enhanced multiplication instructions. The result of the

 

operation is stored in a dedicated, 32-bit accumulator.

n-channel FET

A field-effect transistor with an n-type conducting

 

path (channel).

n-type material

Semiconductor material with introduced impurities

 

(doping) causing it to have an excess of negatively

 

charged carriers.

near constants

Constants that can be accessed with nonextended

 

instructions. Constants in page 00H are near constants

 

(EP_REG = 00H is assumed). See also far constants.

near data

Data that can be accessed with nonextended instruc-

 

tions. Data in page 00H is near data (EP_REG = 00H

 

is assumed). See also far data.

nonmaskable interrupts

Interrupts that cannot be masked (disabled) and

 

cannot be assigned to the PTS for processing. The

 

nonmaskable interrupts are unimplemented opcode,

 

software trap, and NMI.

Glossary-4

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Intel 80C196NU, 8XC196NP, Microcontroller manual Isr

Microcontroller, 80C196NU, 8XC196NP specifications

The Intel 8XC196NP and 80C196NU microcontrollers are part of Intel's renowned 16-bit microcontroller series that gained popularity in the 1980s and 1990s for embedded systems applications. Designed for a variety of applications, these microcontrollers are characterized by their robust performance, versatility, and industry-standard architecture.

The 8XC196NP features an enhanced instruction set with over 100 instructions, allowing for efficient code execution. It operates at clock speeds up to 16 MHz, which contributes to improved performance in time-sensitive applications. The microcontroller is equipped with a 16-bit data bus, enabling more efficient data handling compared to its 8-bit predecessors, thus accommodating complex algorithms and large data sets.

In terms of memory architecture, the 8XC196NP supports an addressable memory space of up to 64 KB of program memory and 64 KB of data memory. This configuration provides sufficient space for large applications while ensuring fast data access. The microcontroller includes integrated features such as timers, serial I/O capabilities, and interrupt processing, which enhance its functionality for real-time applications and control mechanisms.

The 80C196NU, on the other hand, is designed for lower power operation, making it suitable for battery-powered devices. This microcontroller maintains similar features to the 8XC196NP while offering advancements that support low-power consumption. The 80C196NU can also function in a range of temperature environments, making it adaptable for industrial applications.

Both the 8XC196NP and 80C196NU support external memory interfacing, allowing designers to expand the system's capability by connecting additional ROM and RAM. This flexibility makes them appealing for developing complex systems, such as motor controls, industrial automation, and consumer electronics.

Another standout feature of these microcontrollers is their built-in debugging capabilities. Intel provided hardware and software tools that enabled developers to test and troubleshoot their applications effectively, reducing the development time and increasing reliability.

Overall, the Intel 8XC196NP and 80C196NU microcontrollers stand out for their dependability, versatility, and performance, contributing significantly to the evolution of embedded system design. Their legacy continues to influence modern microcontroller technology, ensuring their relevance in a wide array of applications today.