80C186EA/80C188EA, 80L186EA/80L188EA

Table 8. SQFP Pin Functions with Package Location

AD Bus

 

AD0

1

AD1

3

AD2

6

AD3

8

AD4

12

AD5

14

AD6

16

AD7

18

AD8 (A8)

2

AD9 (A9)

5

AD10 (A10)

7

AD11 (A11)

9

AD12 (A12)

13

AD13 (A13)

15

AD14 (A14)

17

AD15 (A15)

19

A16/S3

21

A17/S4

22

A18/S5

23

A19/S6

24

Bus Control

 

ALE/QS0

29

 

 

 

 

 

 

 

 

 

 

 

 

 

BHE/(RFSH)

26

 

 

 

 

 

 

 

 

 

40

 

S0

 

 

 

 

 

 

 

 

 

39

 

S1

 

 

S2

38

 

 

 

 

 

 

 

 

 

 

RD/QSMD

28

 

 

 

 

 

 

 

 

WR/QS1

27

 

ARDY

37

 

SRDY

44

 

DEN

 

56

 

 

 

 

 

54

 

DT/R

 

 

 

45

 

LOCK

 

HOLD

43

 

HLDA

42

 

 

 

 

 

 

 

 

 

No Connection

 

 

 

 

N.C.

4

 

N.C.

25

 

N.C.

35

 

N.C.

72

Processor Control

 

 

 

 

 

 

 

 

 

RESIN

73

 

RESOUT

34

 

CLKIN

32

 

OSCOUT

33

 

CLKOUT

36

 

 

 

 

 

 

 

 

TEST/BUSY

46

 

NMI

47

 

INT0

48

 

 

 

 

 

49

 

INT1/SELECT

 

 

 

 

52

 

INT2/INTA0

 

 

 

 

53

 

INT3/INTA1

 

PDTMR

55

Power and Ground

VCC

10

VCC

11

VCC

20

VCC

50

VCC

51

VCC

61

VSS

30

VSS

31

VSS

41

VSS

70

VSS

80

I/O

 

 

 

 

 

 

 

 

 

 

 

UCS

62

 

LCS

 

63

 

 

 

 

 

 

 

 

 

MCS0/PEREQ

57

 

 

 

 

 

 

 

 

 

MCS1/ERROR

58

 

MCS2

 

 

 

59

 

MCS3/NPS

60

 

 

 

 

 

 

PCS0

 

71

 

PCS1

69

 

PCS2

 

68

 

PCS3

 

67

 

PCS4

 

66

 

PCS5/A1

65

 

 

 

 

 

PCS6/A2

64

 

TMR IN 0

77

 

TMR IN 1

76

 

TMR OUT 0

75

 

TMR OUT 1

74

 

DRQ0

79

 

DRQ1

78

NOTE:

Pin names in parentheses apply to the 80C186EA/80L188EA.

Table 9. SQFP Pin Locations with Pin Names

1

AD0

 

21

2

AD8 (A8)

 

22

3

AD1

 

23

4

N.C.

 

24

5

AD9 (A9)

 

25

6

AD2

 

26

7

AD10 (A10)

 

27

8

AD3

 

28

9

AD11 (A11)

 

29

10

VCC

 

30

11

VCC

 

31

12

AD4

 

32

13

AD12 (A12)

 

33

14

AD5

 

34

15

AD13 (A13)

 

35

16

AD6

 

36

17

AD14 (A14)

 

37

18

AD7

 

38

19

AD15 (A15)

 

39

20

VCC

 

40

A16/S3

A17/S4

A18/S5

A19/S6

N.C.

BHE/(RFSH)

WR/QS1

RD/QSMD

ALE/QS0

VSS

VSS

X1

X2

RESET

N.C.

CLKOUT

ARDY

S2

S1

S0

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

VSS

HLDA

HOLD

SRDY

LOCK TEST/BUSY NMI

INT0

INT1/SELECT

VCC

VCC

INT2/INTA0

INT3/INTA1

DT/R

PDTMR

DEN MCS0/PEREQ

MCS1/ERROR

MCS2

MCS3/NPS

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

VCC

UCS

LCS PCS6/A2

PCS5/A1

PCS4

PCS3

PCS2

PCS1

VSS

PCS0

N.C.

RES

TMR OUT 1 TMR OUT 0 TMR IN 1 TMR IN 0 DRQ1 DRQ0

VSS

NOTE:

Pin names in parentheses apply to the 80C186EA/80L188EA.

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Intel 80C186EA, 80L186EA, 80L188EA, 80C188EA Sqfp Pin Functions with Package Location, Sqfp Pin Locations with Pin Names

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.