Z89175 Zilog., Z89175 Datasheet - Page 35

• Manufacturer Part Number: Z89175
• Description: Voice Processing Controllers
• Manufacturer: Zilog.

Zilog
Interrupts. The Z8 has six different interrupts from six dif-
ferent sources. The interrupts are maskable and prioritized
(Figure 22). The six sources are divided as follows; three
sources are claimed by Port 3 lines P33-P31, two by
DS97TAD0100
Interrupt
Request
Interrupt
Enable
Global
Figure 22. Interrupt Block Diagram
P R E L I M I N A R Y
IRQ1, 3, 4, 5
Vector Select
Priority
counter/timers, and one by the DSP (Table 6). The Inter-
rupt Mask Register globally or individually enables or dis-
ables the six interrupt requests.
Logic
IMR
IRQ
IPR
IRQ0 IRQ2
Interrupt
Select
Edge
Voice Processing Controllers
IRQ Register
(D6, D7)
6
Z89175/Z89176
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2