A Generic PWM Waveform | Intel Microcontroller, 80C196NU, 8XC196NP

STANDARD AND PTS INTERRUPTS

Output Value

on		off		on	off

0	T1		T2	T2 + T1	time

On-time = T1

Off-time = T2 - T1

A0263-02

Figure 6-14. A Generic PWM Waveform

The PWM modes do not use a PTSCOUNT register to specify the number of consecutive PTS cycles. To stop producing the PWM output, first clear the PTSSEL.x bit to disable PTS service for the interrupt and then use the interrupt service routine to reconfigure the EPA channel.

6.6.5.1PWM Toggle Mode Example

Figure 6-15 shows the PTS control block for PWM toggle mode. To generate a PWM waveform using PWM toggle mode and EPA0, complete the following procedure. This example uses the values stored in CSTORE1 and CSTORE2 to control the frequency and duty cycle of a PWM.

1.Disable the interrupts and the PTS. The DI instruction disables all standard interrupts; the DPTS instruction disables the PTS.

2.Store the on-time value (T1) in CSTORE1.

3.Store the off-time value (T2 – T1) in CSTORE2.

4.Set up the PTSCB as shown in Table 6-8.

—Load PTSCON with 43H (selects PWM toggle mode, initial TBIT value = 1).

—Set up PTSPTR1 to point to EPA0_TIME (the EPA0 event-time register).

—Load PTSCONST1 with the on-time value (T1) from CSTORE1.

—Load PTSCONST2 with the off-time value (T2 – T1) from CSTORE2.

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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.

Intel Microcontroller, 80C196NU, 8XC196NP manual a Generic PWM Waveform, PWM Toggle Mode Example

Models: Microcontroller 80C196NU 8XC196NP