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Last update: 20 September 2004

IC number:80287
IC function:Floating-point co-processor
Related components:8087 (predecessor), 80387SX, 80387DX, 80486DX, 80486DX2 (successors), 80286 (main processor)

Component documentation
IC numberManufacturerDocumentation
i80287 (80287)IntelNot available

Component versions
IC numberPackageCBM part numberCBM part description
C80287, D8028740-pin Cermic DIP380282-03IC, 80287

Positions
DevicePositionPackage
A2286U2 (not installed)DIP
PC30-III board rev. 1U302 (not installed)DIP
PC30-III board rev. 8U302 (not installed)DIP
PC40-III
SL286/SL386SX CPU card DB2U104 (not installed)DIP

Pinout
PinTypeNameSignal name
A2286PC30-III, PC40-IIISL286 CPU card
1..2Input_S1.._S0S1..S0unused
3InputCOD/_INTAconnected to pin 66 of 80286unused
4N/CN.C.unused
5..8I/OD15..D12D15..D12
9PowerVCC+5VVCC
10PowerVSSGND
11..12I/OD11.D10D11..D10
13N/CN.C.unused
14..23I/OD9..D0D9..D0
24OutputPEREQconnected to pin 61 of 80286
25Output_BUSY_BUSY287NBUSY'NBUSYNPX
26Output_ERRORERRORNERROR'NERRORNPX
27Input_NPRD_IORNIOR'NIOR
28Input_NPWR_IOWNIOW'NIOW
29InputCMD0SYSA1BADDR1BA1
30PowerVSSGND
31InputCMD1SYSA2BADDR2BA2
32InputCLKCPUCLK via JS7DCPUCLK287CLK
33InputNPS2SYSA4BADDR4BA4
34Input_NPS1_NPCSNNPCS'NNPCS
35InputRESETNPRSTRESNPX
36Input_PEACKconnected to pin 6 of 80286
37InputCLK286CPUCLKunused
38InputHLDAHLDAunused
39InputCKMGND via JS7BGNDCKM_FU_JP
40Input_READYREADYunused

Copyright © 2003-2004 Ronald van Dijk - All rights reserved