Intel 80286 microprocessor

80286 is available in 68 pin . CLK This is the system clock input pin . D15-D0 These are sixteen bidirectional data bus  Lines . BHE This output signal ,  indicate that there is a transfer on the higher byte of the Data bus . S0-S1 These are the active low status output signal Which indicates imitation of a bus cycle and  with 0 and COD / INTA , they define the type of the bus cycle. INTR Through this active high input , an external device request 80286 to suspect the current instruction execution and serve the interrupt request. Vss This pin is a system ground pin of 80286 . Vcc This pin is used to apply +5v power supply voltage to the internal circuit of 80286 . 

1) The Intel 80286 is an advanced version of       the 8086 microprocessor. 2) 80286 is designed for multiple and      multitasking system . 3) It is high performance 16- bit              microprocessor , six times faster then      the 8086 microprocessor. 4) It provides hardware and software logic     to implement multitasking Os like     windows . 5) It is upward compatible with 8086, 8088     and 80186/80188 instruction set . 6) It provides an on : chip MMU. The MMU    operates in two mode viz . Real mode and    Protected mode . 7) It was used in IBM PC-AT . 8) It provides 24- bit address bus ; hence it    can access 16 MB physical or    semiconductor memory . 9) In protected mode, it can accept 1GB    virtual memory . 10) The clock frequencies are 4MHz , 6MHz,      8MHz , 10 MHz and 12.5 ...