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Intel 80C196NU, 8XC196NP manual Programming the Interrupts, Execution Times for PTS Cycles

Models: Microcontroller 80C196NU 8XC196NP

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8XC196NP, 80C196NU USER’S MANUAL

Table 6-4. Execution Times for PTS Cycles

PTS Mode

Execution Time (in State Times)

 

 

Single transfer mode

 

register/register†

18 per byte or word transfer + 1

memory/register†

21 per byte or word transfer + 1

memory/memory†

24 per byte or word transfer + 1

Block transfer mode

 

register/register†

13 + 7 per byte or word transfer (1 minimum)

memory/register†

16 + 7 per byte or word transfer (1 minimum)

memory/memory†

19 + 7 per byte or word transfer (1 minimum)

PWM remap mode

15

 

 

PWM toggle mode

15

 

 

†Register indicates an access to the register file or peripheral SFR. Memory indicates an access to a memory-mapped register, I/O, or memory. See Table 5-1 on page 5-4 for address information.

6.5PROGRAMMING THE INTERRUPTS

The PTS select register (PTSSEL) selects either PTS service or a standard software interrupt ser- vice routine for each of the maskable interrupt requests (see Figure 6-4). The interrupt mask reg- isters, INT_MASK and INT_MASK1, enable or disable (mask) individual interrupts (see Figures 6-5 and 6-6). With the exception of the nonmaskable interrupt (NMI) bit (INT_MASK1.7), setting a bit enables the corresponding interrupt source and clearing a bit dis- ables the source.

To disable any interrupt, clear its mask bit. To enable an interrupt for standard interrupt service, set its mask bit and clear its PTS select bit. To enable an interrupt for PTS service, set both the mask bit and the PTS select bit.

When you assign an interrupt to the PTS, you must set up a PTS control block (PTSCB) for each interrupt source (see “Initializing the PTS Control Blocks” on page 6-17) and use the EPTS in- struction to globally enable the PTS. When you assign an interrupt to a standard software service routine, use the EI (enable interrupts) instruction to globally enable interrupt servicing.

NOTE

The DI (disable interrupts) instruction does not disable PTS service. However, it does disable service for the end-of-PTS interrupt request. If an interrupt request occurs while interrupts are disabled, the corresponding pending bit is set in the INT_PEND or INT_PEND1 register.

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Intel 80C196NU manual Programming the Interrupts, Execution Times for PTS Cycles, PTS Mode Execution Time in State Times
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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.