Z90103 Zilog., Z90103 Datasheet - Page 21

• Manufacturer Part Number: Z90103
• Description: 40-Pin Low-Cost Digital Television Controller
• Manufacturer: Zilog.

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