XR88C681CN/40 EXAR [Exar Corporation], XR88C681CN/40 Datasheet - Page 40

• Manufacturer Part Number: XR88C681CN/40
• Description: CMOS DUAL CHANNEL UART (DUART)
• Manufacturer: EXAR [Exar Corporation]

Additional Things to Note About Z-Mode Operation


XR88C681
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Figure 16. Timing Diagram Illustrating the Sequence of Events Occurring Between the
DUART and the CPU During an Interrupt Request/Acknowledge and Servicing
Figure 15
Figure 15
Figure 16


Please note that it is possible to interface the 80X86
Family of microprocessors to an I-Mode DUART,
however, additional components and design complexity
would be required in order to accomplish this
C.6.2.1 Z-80 Microprocessor
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