Z90102 Datasheet, PDF (21/36 Pages) Zilog, Inc. – 40-Pin Low-Cost Digital Television Controller

Zilog
Z90102/90103/90104
40-Pin Low-Cost Digital Television Controller
Interrupts. The DTC has six different interrupts from six two sources are claimed by Port 3 (P30, P31), one by
different sources. These interrupts are maskable and pri- VSYNC, two by the counter/timers, and one is software
oritized (Figure 19). The six sources are divided as follows: triggered only.
1
IRQ
IRQ
IMR
6
Global
Interrupt
Enable
IPR
Interrupt
Request
Priority
Logic
Vector Select
Figure 19. Interrupt Block Diagram
DS97TEL1902
21