80C186EA/80C188EA, 80L186EA/80L188EA

INSTRUCTION SET SUMMARY (Continued)

 

 

 

 

 

 

 

80C186EA

80C188EA

 

Function

 

 

Format

 

Clock

Clock

Comments

 

 

 

 

 

 

 

Cycles

Cycles

 

ARITHMETIC (Continued)

 

 

 

 

 

 

 

 

IMUL e Integer multiply (signed):

 

1 1 1 1 0 1 1 w

mod 1 0 1 r/m

 

 

 

 

 

Register-Byte

 

 

 

 

 

25 – 28

25 – 28

 

Register-Word

 

 

 

 

 

34 – 37

34 – 37

 

Memory-Byte

 

 

 

 

 

31 – 34

32 – 34

 

Memory-Word

 

 

 

 

 

40 – 43

40 – 43*

 

 

 

 

 

 

 

 

 

 

IMUL e Integer Immediate multiply

 

0 1 1 0 1 0 s 1

mod reg r/m

data

data if se0

22 – 25

22-25

 

(signed)

 

 

 

 

 

 

29 – 32

29 – 32

 

 

 

 

 

 

 

 

 

DIV e Divide (unsigned):

 

1 1 1 1 0 1 1 w

mod 1 1 0 r/m

 

 

 

 

 

Register-Byte

 

 

 

 

 

29

29

 

Register-Word

 

 

 

 

 

38

38

 

Memory-Byte

 

 

 

 

 

35

35

 

Memory-Word

 

 

 

 

 

44

44*

 

IDIV e Integer divide (signed):

 

1 1 1 1 0 1 1 w

mod 1 1 1 r/m

 

 

 

 

 

Register-Byte

 

 

 

 

 

44 – 52

44 – 52

 

Register-Word

 

 

 

 

 

53 – 61

53 – 61

 

Memory-Byte

 

 

 

 

 

50 – 58

50 – 58

 

Memory-Word

 

 

 

 

 

59 – 67

59 – 67*

 

AAM e ASCII adjust for multiply

 

1 1 0 1 0 1 0 0

0 0 0 0 1 0 1 0

 

 

19

19

 

 

 

 

 

 

 

 

 

AAD e ASCII adjust for divide

 

1 1 0 1 0 1 0 1

0 0 0 0 1 0 1 0

 

 

15

15

 

 

 

 

 

 

 

 

 

 

CBW e Convert byte to word

 

1 0 0 1 1 0 0 0

 

 

 

 

2

2

 

 

 

 

 

 

 

 

 

 

CWD e Convert word to double word

 

1 0 0 1 1 0 0 1

 

 

 

 

4

4

 

LOGIC

 

 

 

 

 

 

 

 

Shift/Rotate Instructions:

 

 

 

 

 

 

 

 

Register/Memory by 1

 

1 1 0 1 0 0 0 w

mod TTT r/m

 

 

2/15

2/15

 

 

 

 

 

 

5an/17an

5an/17an

 

Register/Memory by CL

 

1 1 0 1 0 0 1 w

mod TTT r/m

 

 

 

 

 

 

 

 

 

 

 

 

 

Register/Memory by Count

 

1 1 0 0 0 0 0 w

mod TTT r/m

count

 

5an/17an

5an/17an

 

 

 

 

TTT Instruction

 

 

 

 

 

 

 

 

0 0 0

ROL

 

 

 

 

 

 

 

 

0 0 1

ROR

 

 

 

 

 

 

 

 

0 1 0

RCL

 

 

 

 

 

 

 

 

0 1 1

RCR

 

 

 

 

 

 

 

 

1 0 0

SHL/SAL

 

 

 

 

 

 

 

 

1 0 1

SHR

 

 

 

 

 

 

 

 

1 1 1

SAR

 

 

 

 

 

AND e And:

 

 

 

 

 

 

 

 

Reg/memory and register to either

 

0 0 1 0 0 0 d w

mod reg r/m

 

 

3/10

3/10*

 

 

 

 

 

 

 

4/16*

 

Immediate to register/memory

 

1 0 0 0 0 0 0 w

mod 1 0 0 r/m

data

data if we1

4/16

 

Immediate to accumulator

 

0 0 1 0 0 1 0 w

 

data

data if we1

 

3/4

3/4*

8/16-bit

TESTeAnd function to flags, no result:

 

 

 

 

 

 

 

 

Register/memory and register

 

1 0 0 0 0 1 0 w

mod reg r/m

 

 

3/10

3/10*

 

 

 

 

 

 

 

4/10*

 

Immediate data and register/memory

 

1 1 1 1 0 1 1 w

mod 0 0 0 r/m

data

data if we1

4/10

 

 

 

 

 

 

 

 

 

 

Immediate data and accumulator

 

1 0 1 0 1 0 0 w

 

data

data if we1

 

3/4

3/4

8/16-bit

OReOr:

 

 

 

 

 

 

 

 

Reg/memory and register to either

 

0 0 0 0 1 0 d w

mod reg r/m

 

 

3/10

3/10*

 

 

 

 

 

 

 

4/16*

 

Immediate to register/memory

 

1 0 0 0 0 0 0 w

mod 0 0 1 r/m

data

data if we1

4/16

 

Immediate to accumulator

0 0 0 0 1 1 0 w

data

data if we1

3/4

3/4*

8/16-bit

Shaded areas indicate instructions not available in 8086/8088 microsystems.

NOTE:

*Clock cycles shown for byte transfers. For word operations, add 4 clock cycles for all memory transfers.

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Intel 80C188EA, 80L186EA, 80L188EA, 80C186EA specifications Logic
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80L186EA, 80L188EA, 80C186EA, 80C188EA specifications

The Intel 80C188EA, 80C186EA, 80L188EA, and 80L186EA microprocessors represent significant developments in the realm of embedded computing during the 1980s. These processors are part of Intel's x86 architecture, designed to cater to a variety of industrial applications, including automotive and telecommunications.

The 80C188EA and 80C186EA are CMOS variants that offer enhanced power efficiency and reduced heat generation compared to their NMOS predecessors. Operating at clock speeds of up to 25 MHz, these processors are known for their performance in real-time applications. The 80C188EA features a 16-bit data bus and a 16-bit address bus, which can support up to 1 MB of addressable memory. It also boasts an extended instruction set for greater computing flexibility, making it suitable for intricate tasks in embedded systems.

Similarly, the 80C186EA is characterized by its 16-bit architecture, but it includes additional on-chip memory management capabilities. This processor can handle 256 KB of memory directly and supports paged memory management, facilitating efficient multitasking and resource sharing in complex applications. Its integrated DMA controller and interrupt controller allow for superior handling of peripheral devices, making it ideal for real-time processing requirements.

On the other hand, the 80L188EA and 80L186EA are low-power variants optimized for battery-operated designs. These microprocessors are tailored for applications where power consumption is critical. The 80L188EA retains the essential features of the 80C188EA but operates at lower voltage levels, thus allowing for longer operational life in portable devices. The 80L186EA similarly benefits from reduced power consumption, taking advantage of its energy-efficient design to enhance durability in industrial automation scenarios.

All four processors leverage Intel's established x86 architecture, enabling a wide range of software compatibility. Their built-in support for real-time interrupt handling and I/O operations provides developers with valuable tools for building reliable embedded systems. Additionally, they feature on-chip oscillators and timers, further streamlining design requirements and reducing the need for external components.

Overall, the Intel 80C188EA, 80C186EA, 80L188EA, and 80L186EA processors are ideal for diverse applications in embedded systems. Their blend of processing power, energy efficiency, and versatility continues to influence the design of modern electronic devices, underscoring Intel's pivotal role in advancing microprocessor technology.
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