XR88C681J-F Datasheet, PDF (38/101 Pages) Exar Corporation – Two Full Duplex, Independent Channels

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