INSTRUCTION SET REFERENCE

 

 

 

Table A-6. Instruction Set (Continued)

 

 

 

 

 

 

 

 

 

 

 

 

Mnemonic

 

 

 

Operation

 

 

 

 

 

Instruction Format

 

 

 

 

 

 

DI

DISABLE INTERRUPTS. Disables

 

 

 

 

 

interrupts. Interrupt calls cannot occur after

DI

 

 

this instruction.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(11111010)

 

Interrupt Enable (PSW.1) 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PSW Flag Settings

 

 

 

 

 

 

Z

N

C

 

V

VT

 

ST

 

 

 

 

 

— —

 

 

 

 

 

 

 

 

 

DIV

DIVIDE INTEGERS. Divides the contents of

 

DEST, SRC

 

the destination long-integeroperand by the

DIV

lreg, waop

 

contents of the source integer word operand,

 

(11111110) (100011aa) (waop) (lreg)

 

using signed arithmetic. It stores the quotient

 

 

 

 

into the low-order word of the destination

 

 

 

(i.e., the word with the lower address) and the

 

 

 

remainder into the high-order word. The

 

 

 

following two statements are performed

 

 

 

concurrently.

 

 

 

 

 

 

 

 

 

 

(low word DEST) (DEST) / (SRC)

 

 

 

(high word DEST) (DEST) MOD (SRC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PSW Flag Settings

 

 

 

 

 

 

Z

N

C

 

V

VT

 

ST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DIVB

DIVIDE SHORT-INTEGERS. Divides the

 

DEST, SRC

 

contents of the destination integer operand

DIVB

wreg, baop

 

by the contents of the source short-integer

 

(11111110) (100111aa) (baop) (wreg)

 

operand, using signed arithmetic. It stores the

 

 

 

 

quotient into the low-order byte of the

 

 

 

destination (i.e., the word with the lower

 

 

 

address) and the remainder into the high-

 

 

 

order byte. The following two statements are

 

 

 

performed concurrently.

 

 

 

 

 

 

 

(low byte DEST) (DEST) / (SRC)

 

 

 

(high byte DEST)

(DEST) MOD (SRC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PSW Flag Settings

 

 

 

 

 

 

Z

N

C

 

V

VT

 

ST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A-13

Page 318
Image 318
Intel 80C196NU, 8XC196NP, Microcontroller manual Div, Dest MOD SRC

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.