ZiLOG Z8 User Manual

Z8 Microcontrollers
Interrupts ZiLOG
7-2 UM001601-0803
7.2 INTERRUPT SOURCES
Table 7-1 presents the interrupt types, sources, and vectors available in the Z8 family of processors.
7.2.1 External Interrupt Sources
External sources involve interrupt request lines IRQ0-IRQ3.
IRQ0, IRQ1, and IRQ2 can be generated by a transition on the
corresponding Port 3 pin (P32, P33, and P31 correspond to
IRQ0, IRQ1, and IRQ2, respectively).
Figure 7-3 is a block diagram for interrupt sources IRQ0, IRQ1,
and IRQ2.
Note: The interrupt sources and trigger conditions are device
dependent. See the device product specification to determine
available sources (internal and external), triggering edge
options, and exact programming details.
Tab le 7-1. Interrupt Types, Sources, and Vectors *
Name Sources Vector Location Comments
IRQ
0
DAV
0
, IRQ
0
, Comparator 0,1 External (P3
2
), Edge Triggered; Internal
IRQ
1
DAV
1
, IRQ
1
2,3 External (P3
3
), Edge Triggered; Internal
IRQ
2
DAV
2
, IRQ
2
, TIN, Comparator 4,5 External (P3
1
), Edge Triggered; Internal
IRQ
3
6,7 External (P3
0
) or (P3
2
), Edge Triggered;
Internal
Serial In 6,7 Internal
T
0
8,9 Internal
Serial Out 8,9 Internal
IRQ
5
T
1
10,11 Internal
Figure 7-3. Interrupt Sources IRQ0-IRQ2 Block Diagram
P3
n
IRQ
m
System Clock
Multiple Input
n = 2, 3, 1
and Signal
Q
S
R
Conditioning
Circuitry
m = 0,1,2
(Internal)
Q
D
Q
D

ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English