Interrupt Pending Intpend Register | Intel 80C196NU, 8XC196NP

8XC196NP, 80C196NU USER’S MANUAL

INT_PEND	Address:	0009H
	Reset State:	00H

When hardware detects a pending interrupt, it sets the corresponding bit in the interrupt pending (INT_PEND or INT_PEND1) registers. When the vector is taken, the hardware clears the pending bit. Software can generate an interrupt by setting the corresponding interrupt pending bit.

EPA0	RI	TI	EXTINT1

EXTINT0	—	OVRTM2	OVRTM1

Bit		Function
Number		Function
Number

7:3	Any set bit indicates that the corresponding interrupt is pending. The interrupt bit is
1:0	cleared when processing transfers to the corresponding interrupt vector.
	The standard interrupt vector locations are as follows:
	Bit Mnemonic	Interrupt	Standard Vector
	EPA0	EPA Capture/Compare Channel 0	FF200EH
	RI	SIO Receive	FF200CH
	TI	SIO Transmit	FF200AH
	EXTINT1	EXTINT1 pin	FF2008H
	EXTINT0	EXTINT0 pin	FF2006H
	OVRTM2	Timer 2 Overflow/Underflow	FF2002H
	OVRTM1	Timer 1 Overflow/Underflow	FF2000H

2	Reserved. This bit is undefined.

Figure 6-7. Interrupt Pending (INT_PEND) Register

6-16

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 80C196NU, 8XC196NP, Microcontroller manual Interrupt Pending Intpend Register

Models: Microcontroller 80C196NU 8XC196NP

8XC196NP, 80C196NU USER’S MANUAL

INT_PEND

EPA0

Bit

Bit Mnemonic

Figure 6-7. Interrupt Pending (INT_PEND) Register

Microcontroller, 80C196NU, 8XC196NP specifications