8XC196NP, 80C196NU USER’S MANUAL

 

 

 

TCHCL

TCLCL

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TCLLH

TLLCH

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CLKOUT

 

 

 

 

 

 

 

TLHLH

 

 

 

 

TWHLH

 

 

 

 

TRHLH

TLHLL

ALE

 

 

 

 

 

 

 

TRHRL

 

TRLCL

 

 

TRHDZ

 

T

T

RLRH

TRHAX

 

AVRL

 

 

 

RD#

 

 

 

 

 

 

TCHDV

 

 

TRLDV

 

 

 

TAVDV

 

 

 

 

TSLDV

 

 

 

AD15:0

 

 

Valid

 

(read)

 

 

 

 

 

 

 

TWLCL

 

 

TWHQX

 

TAVWL

TWLWH

TWHAX

 

WR#

 

 

 

 

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(write)

 

 

 

 

 

 

 

 

 

 

TWHBX,TRHBX

 

BHE#, INST

 

 

 

 

A19:0

 

 

 

 

CSx#

 

 

 

 

 

 

 

 

T0012-02

Figure 13-23. Demultiplexed System Bus Timing (80C196NU)

13.9.1 Deferred Bus-cycle Mode (80C196NU Only)

The 80C196NU offers a deferred bus cycle mode. This bus mode (enabled by CCR1.5; see Figure 13-7 on page 13-16) reduces bus contention when using the 80C196NU in demultiplexed mode with slow memories. As shown in Figure 13-24, a delay of 2t occurs in the first bus cycle follow- ing a chip-select output change and the first write cycle following a read cycle.

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Intel 8XC196NP, Microcontroller manual Deferred Bus-cycle Mode 80C196NU Only, Demultiplexed System Bus Timing 80C196NU
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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.
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