xr88c681 Exar Corporation, xr88c681 Datasheet - Page 48
xr88c681
Manufacturer Part Number
xr88c681
Description
Cmos Dual Channel Uart Duart
Manufacturer
Exar Corporation
Datasheet
1.XR88C681.pdf
(101 pages)
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Figure 21 and Figure 22 present the 8086 CPU Mode, when operating in the “min” and “max” modes, respectively.
Rev. 2.11
Vcc
INTR
-INTA
HOLD
-DEN
DT/-R
MN/-MX
8086 CPU
Figure 21. Schematic of the 8086 CPU Mode (Min Mode)
AD8 - AD15
AD0 - AD7
M/-IO
ALE
-RD
-WR
48
D
C
D
C
74LS373
74LS373
Q
Q
D0 - D7
A0 - A7
D8 - D15
A8 - A15
-IOR
-MEMR
-IOW
-MEMW
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