Z89175 Datasheet, PDF (35/68 Pages) Zilog, Inc. – Voice Processing Controllers

Zilog
Z89175/Z89176
Voice Processing Controllers
Interrupts. The Z8 has six different interrupts from six dif- counter/timers, and one by the DSP (Table 6). The Inter-
ferent sources. The interrupts are maskable and prioritized rupt Mask Register globally or individually enables or dis-
(Figure 22). The six sources are divided as follows; three ables the six interrupt requests.
sources are claimed by Port 3 lines P33-P31, two by
2
IRQ0 IRQ2
IRQ1, 3, 4, 5
Interrupt
Edge
Select
IRQ Register
(D6, D7)
IRQ
IMR
6
Interrupt
Request
Global
Interrupt
Enable
IPR
Priority
Logic
Vector Select
Figure 22. Interrupt Block Diagram
DS97TAD0100
PRELIMINARY
35