STANDARD AND PTS INTERRUPTS

1-Mbyte Mode

64-Kbyte Mode

4

3

2 1

39

15

3

12

6

4

3

2 1

39

11

2

12

6

Execution

Interrupt

Interrupt

Pending

Bit

Response

Time

 

Ending

"NORML"

End

Call is

If Stack

 

Instruction

"NORML"

Forced

External

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set

Cleared

1-Mbyte Mode 61 State Times

64-Kbyte Mode 56 State Times

"PUSHA" If Stack

External

Interrupt Routine

A0261-02

Figure 6-2. Standard Interrupt Response Time

6.4.2.2PTS Interrupt Latency

In both 64-Kbyte and 1-Mbyte modes, the maximum delay for a PTS interrupt is 43 state times (4 + 39) as shown in Figure 6-3. This delay time does not include the added delay if a protected instruction is being executed or if a PTS request is already in progress. See Table 6-4 for execution times for PTS cycles.

64-Kbyte or 1-Mbyte Mode 4 3 2 1

 

 

 

39

 

 

 

 

 

 

Execution

Ending

 

"NORML"

 

End

 

 

Instruction

 

 

"NORML"

 

 

 

 

 

 

 

 

 

 

 

 

 

Interrupt

Interrupt Set

Pending Bit

Vector to PTS

PTS

PTS

Control Block

 

 

 

 

 

 

 

PTS Interrupt Routine

Cleared

Response Time

Latency Time

43 State Times

64-Kbyte or 1-Mbyte Mode

A0262-02

Figure 6-3. PTS Interrupt Response Time

6-9

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Intel Microcontroller, 80C196NU, 8XC196NP manual Standard Interrupt Response Time PTS Interrupt Latency
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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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