XR88C681J View Datasheet(PDF) - Exar Corporation

Part Name

Description

MFG CO.

XR88C681J

CMOS Dual Channel UART (DUART)

Exar Corporation 

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XR88C681

5V

MODA

MODB

E

-R/W

A8 - A15

-IRQ

AS

AD0 - AD7

68HC11

to other ICs

Address

Decoder

A4 - A7

-CS

-RD

-WR

-INTR

G

Q

D

A0 - A3

74HC373

A0 - A3

D0 - D7

XR88C681

Figure 13. XR88C681/MC68HC11 Microcontroller Interfacing Approach

Rev. 2.11

38

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