ZiLOG Z8 Technical Manual

Interrupts
Table 10-1.
Interrupt Types,
Sources,
and Vectors
Vector
NIIIe Source Location
C~ents
IRQO DAVO, IRQO
0,1 External
(
P3
2)'
,
Edge Triggered
IRQ1
DAV1'
IRQ1
2,3
External
(P33)' , Edge
Triggered
IRQZ
DAV2' IRQZ'
TIN
4,5
External
(P31)' , Edge
Triggered
IRQ3
6,7
External
(P30)' , Edge
Triggered
IRQ3
Serial
In 6,7
Internal
TO
8,9 Internal
IRQ4
Serial Out 8,9
Internal
IRQ5
T1
10,11 Internal
IRQ3 can be generated from an external source only
if Serial In is not enabled; otherwise, its source
is internal. The ext,ernal request is generated by
a negative edge signal on P3
0
as shown in Figure
10-4. Again, the external request is synchronized
and delayed before reaching IRQ.
t----1~----I S
o
o
o
o
..I1_
R
CLOCK--~------~
(INTERNAL)
Figure 10-'. Interrupt Sources IRQO-IRQ2 Block Diagrall
P30 P3M6
(IR03
SERIAL IN)
o
CLOCK--+------~
o 1- ..... --+---1
IR03 EXTERNAL SOURCE
SERIAL RECEIVER
1--_ ....
IR03
INTERNAL
SOURCE
Figure 10-4. Interrupt Source IRQ, Block Diagram
IRO
m
m = 0,1,2
IR03
10-2 3047·038.3047·039

ZiLOG Z8 Specifications

General

Brand	ZiLOG
Model	Z8
Category	Desktop
Language	English