Z86E3016PSG Datasheet, PDF (162/348 Pages) Zilog, Inc. – Z86E3016PSG

Z8 Family of Microcontrollers
User Manual
144
Register F9h
Interrupt Priority Register (IPR)
(Write-Only)
D7 D6 D5 D4 D3 D2 D1 D0
Interrupt Group Priority
Bits Priority
000 Reserved
001 C > A > B
010 A > B > C
011 A > C > B
100 B > C > A
101 C > B > A
110 B > A > C
111 Reserved
Group C (IRQ1 and IRQ4 Priority)
0 = IRQ1 > IRQ4
1 = IRQ4 > IRQ1
Group B (IRQ0 and IRQ2 Priority)
0 = IRQ2 > IRQ0
1 = IRQ0 > IRQ2
Group A (IRQ3 and IRQ5 Priority)
0 = IRQ5 > IRQ3
1 = IRQ3 > IRQ5
Reserved (Must be 0)
Figure 96. Interrupt Priority Register
Table 19. Interrupt Priority
Group
C
B
Bit
Bit 1
Bit 2
Value
0
1
0
1
Priority
Highest
IRQ1
IRQ4
IRQ2
IRQ0
Lowest
IRQ4
IRQ1
IRQ0
IRQ2
Interrupts
UM001602-0904