z89138 ZiLOG Semiconductor, z89138 Datasheet - Page 33

• Manufacturer Part Number: z89138
• Description: Voice Processing Controllers
• Manufacturer: ZiLOG Semiconductor

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
DS97TAD0201
Name
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
/DAV2, P31, TIN, AN2
/DAV0, P32, AN2
/DAV1, P33
Source
IRQ3
Interrupt
Request
T0
TI
Table 6. Interrupt Types, Sources, and Vectors
Interrupt
Vector Location
Enable
Global
Figure 22. Interrupt Block Diagram
10, 11
0, 1
2, 3
4, 5
6, 7
8, 9
P R E L I M I N A R Y
IRQ1, 3, 4, 5
Vector Select
External (P32), Programmable Rise or Fall Edge Triggered
External (P33), Fall Edge Triggered
External (P31), Programmable Rise or Fall Edge Triggered
Internal (DSP activated), Fall Edge Triggered
Internal
Internal
Priority
Logic
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.
IMR
IRQ
IPR
IRQ0 IRQ2
Interrupt
Select
Edge
Comments
IRQ Register
(D6, D7)
6
Voice Processing Controllers
Z89138/Z89139
33
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