80C286_08 Datasheet, PDF(3/60 Page) Intersil Corporation – High Performance Microprocessor with Memory Management and Protection

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80C286_08 Datasheet, PDF (3/60 Pages) Intersil Corporation – High Performance Microprocessor with Memory Management and Protection

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80C286

Pinouts (Continued)

68 LEAD PLCC

P.C. Board View - As viewed from the component side of the P.C. board.

PIN 1 INDICATOR

68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52

BHE 1

NC 2

NC 3

S1 4

S0 5

PEACK 6

A23 7

A22 8

VSS 9

A21 10

A20 11

A19 12

A18 13

A17 14

A16 15

A15 16

A14 17

51 D15

50 D7

49 D14

48 D6

47 D13

46 D5

45 D12

44 D4

43 D11

42 D3

41 D10

40 D2

39 D9

38 D1

37 D8

36 D0

35 VSS

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

MOLD MARK DOES NOT

INDICATE PIN 1

Functional Diagram

ADDRESS UNIT (AU)

OFFSET

ADDER

SEGMENT

BASES

SEGMENT

LIMIT SEGMENT

CHECKER SIZES

PHYSICAL

ADDRESS

ADDER

ALU

ADDRESS

LATCHES AND DRIVERS

PRE-

FETCHER

PROCESSOR

EXTENSION

INTERFACE

BUS CONTROL

DATA TRANSCEIVERS

6-BYTE

PREFETCH

QUEUE

BUS UNIT (BU)

REGISTERS CONTROL

EXECUTION UNIT (EU)

3 DECODED

INSTRUCTION

QUEUE

INSTRUCTION

DECODER

INSTRUCTION

UNIT (IU)

NMI

BUSY

INTR ERROR

A23 - A0,

BHE, M/IO

PEACK

PEREQ

READY,

HOLD,

S1, S0,

COD/INTA,

LOCK, HLDA

D15 - D0

RESET

CLK

VSS

VCC

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