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Intel Microcontroller, 8XC196NP XC196NP and 80C196NU Memory Map, Hex Description Addressing Modes

Models: Microcontroller 80C196NU 8XC196NP

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8XC196NP, 80C196NU USER’S MANUAL

Table 5-1. 8XC196NP and 80C196NU Memory Map

Hex

Description

Addressing Modes

Address

 

 

 

 

 

FFFFFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

FF3000

bus

 

FF2FFF

Program memory (Note 1)

 

FF2080

After a device reset, the first instruction fetch is from FF2080H

Indirect, indexed, extended

 

(or F2080H in external memory).

 

FF207F

Special-purpose memory (Note 1)

Indirect, indexed, extended

FF2000

 

 

FF1FFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

FF0100

bus

 

FF00FF

Reserved (Note 2)

—

FF0000

 

 

FEFFFF

Overlaid memory; xF0000—xF00FFH are reserved

Indirect, indexed, extended

0F0000

 

 

0EFFFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

010000

bus

 

00FFFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

003000

bus

 

002FFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

002000

bus (Note 3)

 

001FFF

Peripheral SFRs (Note 4)

Indirect, indexed, extended,

001F00

windowed direct

 

001EFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

001C00

bus; future SFR expansion (Note 5)

 

001BFF

External device (memory or I/O) connected to address/data

Indirect, indexed, extended

000400

bus

 

0003FF

Upper register file (register RAM)

Indirect, indexed,

000100

windowed direct

 

0000FF

Lower register file (register RAM, stack pointer, CPU SFRs)

Direct, indirect, indexed

000000

 

 

NOTES:

1.For the 80C196NP and 80C196NU, the program and special-purpose memory locations (FF2000– FF2FFFH) reside in external memory. For the 83C196NP, these locations can reside either in exter- nal memory or in internal ROM.

2.Do not use these locations except to initialize them. Except as otherwise noted, initialize unused program memory locations and reserved memory locations to FFH.

3.For the 80C196NP and 80C196NU, locations 002000–002FFFH reside in external memory. For the 83C196NP, locations 002000–002FFFH can be external memory (CCB1.2=0) or a copy of program and special-purpose memory stored in the internal ROM (CCB1.2=1).

4.For the 8XC196NP, locations 1FE0–1FFFH contain memory-mapped SFRs. They must be accessed with indirect, indexed, or extended addressing and they cannot be windowed.

5.WARNING: The contents or functions of these locations may change with future device revisions, in which case a program that relies on one or more of these locations might not function properly.

5-4

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Intel Microcontroller, 8XC196NP manual XC196NP and 80C196NU Memory Map, Hex Description Addressing Modes
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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.