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Intel 80C196NU, 8XC196NP, Microcontroller EPA and PTS Operations for the PWM Toggle Mode Example

Models: Microcontroller 80C196NU 8XC196NP

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STANDARD AND PTS INTERRUPTS

 

Start

 

EPA

No

Timer

 

Match

 

?

 

Yes

 

Toggle Output

 

PTS Cycle

= 0

= 1

 

TBIT

EPA0_TIME = EPA0_TIME + T1

EPA0_TIME = EPA0_TIME + (T2 - T1)

 

Toggle TBIT

 

A2552-02

Figure 6-16. EPA and PTS Operations for the PWM Toggle Mode Example

You can modify the duty cycle without interrupting the PWM operation. To change the duty cycle during a PWM cycle, the PTS service routine should write new T1 and T2 – T1 values to CSTORE1 and CSTORE2 and select normal interrupt service for the next EPA0 interrupt. When the next timer match occurs, the output is toggled, and the device executes a normal interrupt ser- vice routine, which performs these operations:

1.The routine writes the new value of T1 (in CSTORE1) to PTSCONST1 and the new value of T1 – T2 (in CSTORE2) to PTSCONST2.

2.It selects PTS service for the EPA0 interrupt.

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Intel 80C196NU, 8XC196NP, Microcontroller manual EPA and PTS Operations for the PWM Toggle Mode Example
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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.