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Z86C91 Datasheet(PDF) 39 Page - Zilog, Inc.

Part # Z86C91
Description  CMOS Z8 ROMLess Microcontrollers
PDF  56 Pages
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z86C91 Datasheet(HTML) 39 Page - Zilog, Inc.

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D7 D6 D5
D4 D3
D2
D1 D0
Interrupt Group Priority
R249 IPR
Reserved = 000
C>A>B = 001
A>B>C = 010
A>C>B = 011
B>C>A = 100
C>B>A = 101
B>A>C = 110
Reserved = 111
IRQ1, IRQ4 Priority (Group C)
0 IRQ1>IRQ4
1 IRQ4>IRQ1
IRQ0, IRQ2 Priority (Group B)
0 IRQ2>IRQ0
1 IRQ0>IRQ2
IRQ3, IRQ5 Priority (Group A)
0 IRQ5>IRQ3
1 IRQ3>IRQ5
Reserved (Must be 0)
D7
D6
D5
D4 D3
D2
D1 D0
R250 IRQ
IRQ0 = P32 Input (D0 = IRQ0)
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = P30 Input, Serial Input
IRQ4 = T0, Serial Input
IRQ5 = T1
Reserved (Must be 0)



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