XR88C681CP Datasheet, PDF (48/99 Pages) Exar Corporation – CMOS DUAL CHANNEL UART (DUART)

XR88C681

9:
#7



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9:



27
.


B

#

#B

#7
92
8288 Bus Controller
2
2B
#
#B
  >
=  6
8086 CPU
7.5

)


74LS373

)


74LS373
  >
=  6
=  6
Figure 22. Schematic of the 8086 CPU Mode (Max Mode)
8086• C Interrupt Processing
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Please note that the DUART has been configured to
operate in the Z-Mode. Therefore, the user must account
for the IEI input to the DUART device
 
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