XR88C681_06 Datasheet, PDF (94/101 Pages) Exar Corporation – CMOS Dual Channel UART (DUART)

XR88C681
-RD or
-CS
IP0 - IP6
-WR or
-CS
OP0 - OP7
t_PS
t_PH
OLD DATA
NEW DATA
t_PD
Figure 54. Port Timing
-RD or
-CS or
-WR
Interrupt
Output
Rev. 2.11
t_IR
Figure 55. Interrupt Timing
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