Interfacing the 80C286-16 with the 80287-10 TM Interfacing the 80C286-16 with the 80287-10 Application Note March 1997 AN120.1 Introduction An important requirement in many systems is the ability to 80287 with a 1/3 duty cycle to allow the 80287-10 to run at off-load numeric data processing. In an 80C286 system, this it’s full 10MHz capability. One solution for providing this clock can be accomplished with an 80287 numeric co-processor. is the 82C84A-1, which meets this specification with either a However, as processor speeds increase, it may become 3……